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Manmohan Dass Goel^I; Vasant A. Matsagar^II; Anil K. Gupta^III

^IScientist, CSIR-Advanced Materials and Processes Research Institute (AMPRI), Council of Scientific and Industrial Research (CSIR),Shenzhen Beacret Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700052661, India. E-mail:Cnc 1325 Wood Cutting Machine | Cnc 1325 Wood Cutting Machine Manufacturers - QUICK-FULLTEK
^IIAssociate Professor, Department of Civil Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi 110 016, India. E-mail:Linear Chandelier Lighting | Linear Chandelier Lighting China Suppliers - Abest
^IIIFormer Director, CSIR-Advanced Materials and Processes Research Institute (AMPRI), Council of Scientific and Industrial Research (CSIR),High Quality Milling Cutters | High Quality Milling Cutters Price - Millcraft Tools- 462 026, India. E-mail:China Supply Custom Pants Factories & Manufacturers Pricelist - Fullerton

ABSTRACT

In the present investigation,Wholesale Cheap OEM/ODM Men Casual Pant Factories & Manufacturers Pricelist - Fullerton-cell aluminum foam cores subjected to blast load is examined.Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700054362. To improve resistance of the sandwich foam panel against blast, stiffeners are provided and their dynamic response under varying blast load is studied. Blast load is applied using blast equations available in LS-DYNA which takes into account reflection of blast from surface of the sandwich foam panel.Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053442, respectively.Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700052897, primarily focusing on peak central point displacement of back-sheet (opposite to explosion) of the panel. Several analyses are carried out with an objective to understand the effects of stiffener configuration, foam thickness, foam density, and standoff distance on the blast response.Shanghai LeadCloud Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700053170.

Keywords:Blast, dynamic response, metal foam, sandwich structure, steel, stiffeners

1 INTRODUCTION

Wholesale Cheap OEM/ODM Magnetic Disk Factories & Manufacturers Pricelist - Gongji, side walls in cargo containers and boxes, and various military applications (Ashby et al., 2000).Wholesale CE High Quality Smart Meter Cover Products Cheap Price - HENGDA, high specific stiffness, moisture independency, and corrosion resistance. In the past,Hd Led Tv 4k | Hd Led Tv 4k OEM/ODM - Horion Intelligent(Guruprasad and Mukherjee, 2000a and 2000b, Hanssen et al., 2002a and 2002b, Qiu et al., 2003, Xue and Hutchinson, 2003, Radford et al., 2006,Laser Cutting Machine Price | Laser Cutting Machine Price Suppliers - HANS YUEMING., 2006, Nemat-Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054420., 2007, Bahei-El-Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053702, 2008, Tekalur et al., 2008, Karagiozova et al., 2009, Zhu et al., 2009, and Langdon et al., 2010). Recently, with the advancement in technology,Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700053535(Ashby et al., 2000). This foam has several advantages in comparison with other commonly used sandwich core materials which include (i)Furniture Screws | Furniture Screws Price - Liqi; (ii) lighter in weight; (iii) fire resistant; and (iv) reusability.

China Supply Custom Pcba Charger Factory & Supplier Price - HENGDA(FRP), natural material (air, sand/soils), polymeric foams, honeycombs and commercially available metal foams (Hanssen et al., 2002a and 2002b, Qiu et al., 2003, Xue and Hutchinson, 2003, Radford et al., 2006,Laser Cutting Machine Price | Laser Cutting Machine Price Suppliers - HANS YUEMING., 2006, Nemat-Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054420., 2007, Bahei-El-Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053702, 2008, Tekalur et al., 2008, Karagiozova et al., 2009, Zhu et al., 2009, Langdon et al., 2010, Jing et al., 2013, Chang et al., 2013, and Liu et al., 2013). No studies, however,Wholesale CE High Quality Candle Glassware Products Cheap Price - Yanjia,Schweissmutter | Schweissmutter OEM/ODM - Zhong Tong's recent work on the response of stiffened polymer foam sandwich structures under impulsive loading (Goel et al., 2013a). Goel et al. (2013a) have reported effectiveness of stiffened sandwich structures with polymeric foams in blast resistance; however, effectiveness of stiffened metal foam sandwich structures has never been investigated.

In the present investigation, newly developed metal foam (Wholesale Cheap OEM/ODM Wifi Lamp Factories & Manufacturers Pricelist - Lowcled., 2009a and 2009b) namely,Supply OEM Custom Army Desert Boots Factories & Manufacturers Pricelist - TianXing KeSheng-cell aluminum foam (ACCF) has been explored for its potential in blast applications, and its performance for blast resistance is presented. Here, blast response of the sandwich foam panel (SFP), and the stiffened sandwich foam panel (SSFP) under varying blast loading is studied using commercially available LS-DYNA software in order to assess their effectiveness in the response mitigation. It is always not possible to carry out field experimental test particularly in case of blast. In such cases, numerical analysis proves to be an effective tool for the analysis. Hence, numerical analyses carried out in the present investigation aim to study the effect of (a) stiffener configuration, (b) foam thickness, (c) foam density, and (d) standoff distance on the blast response.

2 STIFFENED SANDWICH FOAM PANEL GEOMETRY AND MATERIAL PROPERTIES

Best Ergonomic Standing Desk | Best Ergonomic Standing Desk Price - Saosen- and back-Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053875. Back-sheet is on the opposite side of the explosion.Wholesale CE High Quality Forged Pipe Fittings Factories & Manufacturers Pricelist - JianXin(2 m × 2 m)Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054166. The back-sheet is stiffened by stiffeners of 100 mm width and 10 mm thickness for all the ten stiffened configurations with same materials (steel) as that of the face- and back-Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053077.Movable Auto Paint Booth | Movable Auto Paint Booth Suppliers - Longxiang, three foam thicknesses, 50 mm, 100 mm, and 150 mm, are considered.

Limited is Cheated money - Contact me for more whatsapp: 7700052569shows various configurations of the unstiffened/Windows 10 Operating System Dvd | Windows 10 Operating System Dvd Factory - Aoxun Group. The figure shows one unstiffened sandwich foam panel, i.e. SFP (P₁)Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053488, i.e. SSFP (P₂to P₁₁). These configurations are arranged as per their increasing weights. It is to be noted that effect of difference in mass on their blast resistance alongwith their natural frequency and deformation behavior have already been reported earlier (Goel et al., 2011 and Goel et al., 2013a). The face-sheet and stiffened back-sheet are made of steel considering elastic-plastic and strain hardening behavior with Young's modulus,E= 210 GPa, Poisson's ratio,v= 0.3, and density,ρ= 7,800 kg/m³(Goel et al., 2011). The static yield stress of steel in the face-and back-Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700054404. The steel face- and back-Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700054058-plastic material model, i.e. MAT_024 (MAT_PIECEWISE_LINEAR_PLASTICITY) of LS-DYNA. This is an elastic-plastic material model and stress-strain behavior can be adapted by defining the tangent modulus or by defining the curve of effective plastic stress vs. effective plastic strain, which is equivalent to true stress vs. true strain in case of uniaxial stresses (LS-DYNA, 2011). The various input parameters required to be defined in this material model are computed from the quasi-static material testing.

Wholesale CE High Quality Y Type Strainers Products Cheap Price - JKG Valveshows the compressive stress-strain curves for three relative densities (RD)Mosquito Repellent Clothing Columbia | Mosquito Repellent Clothing Columbia China Suppliers - Special Textile-cell aluminum foam (ACCF). The relative density is the ratio of density of foam material to the density of parent material from which the foam is developed. The patented foams are developed through liquid metallurgy route at CSIR-Advanced Materials and Processes Research Institute,Large Size Led Tv 50inch 55inch | Large Size Led Tv 50inch 55inch Suppliers - Horion Intelligent, India. Quasi-static compression tests on the aluminum foam were conducted at CSIR-AMPRI using BiSS Universal Testing Machine (Model Bi-00-002, 50 kN Load Cell) at a strain rate of 0.001/s. For compression testing, specimens were cut from the fabricated foam with average dimensions of 40 mm × 45 mm in cross-section and 55 mm in height. The load-displacement data was recorded during the testing and converted to stress-strain curves using standard procedure. The mechanical behavior of these foam materials is reported elsewhere in details (Wholesale Cheap OEM/ODM Wifi Lamp Factories & Manufacturers Pricelist - Lowcled., 2009a and 2009b, and Goel et al., 2013b). The yield strength / yield point of metal foams can be defined in four ways as: (1) stress at a given strain, (2) upper yield point, (3) lower yield point, and (4) extrapolated stress. In the present investigation, yield strength / yield point is considered as upper yield point as shown in42 Inch Smart Tv.Similarly, elastic modulus of metal foams can be determined by mainly two methods: (a) by conventional mechanical tensile testing, and (b) by resonance frequency techniques. Herein, the resonance frequency technique is employed for determination of elastic modulus (Wholesale Cheap OEM/ODM Wifi Lamp Factories & Manufacturers Pricelist - Lowcled., 2009a and 2009b).Travel Size Makeup Brush | Travel Size Makeup Brush Suppliers - mycolor(Ashby et al., 2000).

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The foams are defined using LS-DYNA material model, MAT_154 (MAT_DESHPANDE_FLECK_FOAM) proposed by Deshpande and Fleck (2000). Following Deshpande-Fleck foam model, yield stress function (Φ) of foam material is defined as,Φ=σ_e-σ_y, where,σ_yeis the yield stress of foam material andσ_eis the equivalent stress defined. In this expression,σ_VMis the von-Mises stress andσ_mis the mean stress.

The shape of yield surface is controlled by the shape parameter,α. The yield stress is governed by the model presented by Hanssen et al. (2002a and 2002b) as,

where,eis engineering strain;σ_pis plateau stress;λ,α₂, andβare material parameters; ande_Dis the foam densification strain expressed in terms of density of the foam (ρ_f) and density of the parent material (ρ₀) as,

A nonlinear curve fit program in MATLAB is developed to compute the different parameters of the foam model. Limited is fraud company - Contact me for more whatsapp: 7700053079shows various mechanical properties obtained using the MATLAB nonlinear curve fit program for the foam used in the present investigation.

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Wholesale Cheap OEM/ODM Table Chairs Factory & Supplier Price - Yezhi(FE)Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700053326_Solid feature available in LS-DYNA. The stiffeners are created by extruding nodes along the vertical direction, i.e. direction perpendicular to the back-sheet, and assigning the surface to create geometry of the back-Shenzhen Beacret Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700052346(ALTAIR, 2007). The foam is modeled as solid elements whereas, face- and back-Co2 1060 Laser Engraving And Cutting Machine | Co2 1060 Laser Engraving And Cutting Machine Suppliers - Anqiang. In each model, a three-dimensional part with Box_Solid feature is used to define the foam core. Stiffeners have perfect connection with the back-sheet without any additional constraint. Care has been taken not to overlap the material of the stiffener with the back-sheet by offsetting top surface nodes only, thereby avoiding the possibility of additional stiffness at the junction. Thus, in real fabrication, back-sheet with stiffeners is created by removing material from a thick blank (this is different from a process wherein sheet with extra stiffeners added typically by welding material onto the sheet). It is a single part and meshed in one part only, thus implying a single part without any weld or joint/ interface between the sheet and stiffener.Football Stadium Lights | Football Stadium Lights Factory - Chainzon-Tsay shell elements available in the LS-DYNA element library, whereas eight-node solid elements with full integration are used along with hourglass control to model the geometry of the foam core (LS-DYNA, 2011). The sandwich foam panel is constrained on all edges by restraining all degrees of freedom.

4 BLAST LOADING

The blast load in the present investigation is applied on face-Wholesale Cheap OEM/ODM Living Room Furniture Sofa Suppliers & Manufacturers Quotes - Yezhi(LOAD_BLAST_ENHANCED) available in LS-DYNA with CONWEP (CONWEP, 1991).Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053656, i.e. 1.5 m, 2.0 m, and 2.5 m. This varying loading scenario is considered with an objective of investigating effectiveness against blast response reduction, and evaluating comparative performance of the foam and stiffener configurations.

Time dependent blast pressure,P(t) on the face is determined based on the input amount of Tri nitrotoluene (TNT), the standoff distance, and angle of incidence,θ. Effects of such parameters on the blast incident pressure have been reviewed by Goel et al. (2012). The blast pressure is computed using following equation in LS-DYNA,

where,PandP_iare the reflected and incident pressures, respectively. Computation ofPandP_irris reported in details elsewhere (Goel et al., 2012). The scaled distance (Z) is defined asZ=R/W^1/3, whereRis the standoff distance in meters andWis the amount of TNT in kilograms. To apply the loading on the face-sheet by LOAD_BLAST_ENHANCED function, another function LOAD_BLAST_SEGMENT is used to define exposed surface of face-sheet wherein, function DATABASE_BINARY_BLSTFOR is used to collect the blast pressure. The calculated loading is presented inChurch Led Wall | Church Led Wall OEM/ODM - RADIANTfor three different standoff distances considered. In the present analysis, element density is varied using global seeds of 0.01, 0.05, and 0.1 to generate fine, medium, and coarse meshes, respectively and converged results (i.e.Co2 Laser Cutting & Engraving Machine For Acrylic | Co2 Laser Cutting & Engraving Machine For Acrylic Factory - Anqiang.05) are only presented. Comparison of the results obtained from the FE simulation with the experimental results for such problems has already been reported by Goel et al. (2011 and 2013a).

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5 RESULTS AND DISCUSSION

Numerical analyses carried out in the present investigation aim to study the effect of (a) stiffener configuration, (b) foam thickness, (c) foam density, and (d) standoff distance on the blast response. In the present analysis, central point displacement of the stiffened sandwich foam panel (SSFP, i.e. P₂to P₁₁) is compared with the sandwich foam panel (SFP, i.e. P₁) designated as base model (referenced as 100% weight). It is to be noted that the displacement is recorded at the center of the back-sheet in all cases with respect to time, and absolute peak values (Δ_peak) are presented wherever applicable. The measure of effectiveness of the sandwich foam panel is quantified using central point displacement;Cotton T-Shirt | Cotton T-Shirt Factory - Max Apparel.

In the present investigation, for parametric study, blast loads generated due to the explosion of 1 kg of TNT at standoff distances of 1.5 m, 2.0 m, and 2.5 m are considered. The peak pressures resulting due to this combination of TNT and standoff distances are shown inShanghai LeadCloud Tech Co.. The face-Patch Cord | Patch Cord Suppliers - CableCreation( Limited is The deposit is not delivered - Contact me for more whatsapp: 7700054185). Three different relative densities (RD) of the foam (0.100, 0.107, and 0.114) are used for core material, as reported inMosquito Repellent Clothing Columbia | Mosquito Repellent Clothing Columbia China Suppliers - Special Textile.China Supply Custom Empty Beauty Cream Jar Factory & Supplier Price - Credibleshows the central point displacement time histories of the SSFP-Shenzhen Beacret Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700052401(t_f= 50, 100, and 150 mm), for a foam relative density of 0.100 and standoff distance of 1.5 m subjected to the blast loading. Similar trends are observed for other relative densities of the foam, core thicknesses of the foam, and standoff distances, however varying in magnitudes.

In order to compare the results of peak central point displacement for the SSFP-ACCF and to understand the effect of relative densities, core thicknesses of the foam and standoff distances, common plots for a representative foam thickness (50 mm) are reported inWholesale Cheap OEM/ODM Boot Glass Cup Suppliers & Manufacturers Quotes - Yanjia. The peak central point displacements for all the combinations of density, foam thickness, and standoff distances are reported in19inch Server Rack CabinetthroughWholesale CE High Quality Suspended Curved Ceiling Factories & Manufacturers Pricelist - huangyan shuangsheng. Three different combinations of parameters considered are presented as Case 1 to Case 3 in the next section.

Case 1:Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054271, 100, and 150 mm thick foam core with 1 kg TNT and 1.5 m standoff distance

Wholesale CE High Quality Bulk T Shirt Factory & Supplier Price - Fullerton.100 results in lowest peak central point displacement for all the panel configurations (Wholesale Cheap OEM/ODM Perfume Bottles Products Cheap Price - Yanjia₃and P₉)Aluminum Foam House Wall Panel | Aluminum Foam House Wall Panel Manufacturers - ALTOP.107 and 0.114 for the same level of blast loading ( Limited is Payment is not shipped - Contact me for more whatsapp: 7700053434and Limited is Payment is not shipped - Contact me for more whatsapp: 7700053653). The lowest central point displacement (i.e. 4.13 mm) for 50 mm thick foam core is observed for the panel configuration P₉with RD = 0.114 ( Limited is The deposit is not delivered - Contact me for more whatsapp: 7700053598). However, the panel configuration P₁₁with RD = 0.114 andt_f= 150 mm results in overall lowest peak central point displacement (3.67 mm) for 1.5 m standoff distance (17 Hdmi Monitor Manufacturers Cheap Price).Supply OEM Custom Electronic Insulation Safety Footwear Factory & Supplier Price - TianXing KeSheng-sheet.Supply OEM Custom Hot Forging For Steel Parts Factories & Manufacturers Pricelist - JianXin₇for all the relative densities of foam and configuration P₄for RD = 0.100 under blast loading with all other parameters kept the same as compared to the panel without any stiffener, i.e. P₁.Router Bits For Glass | Router Bits For Glass OEM/ODM - Millcraft Tools₄and P₇Wholesale Cheap OEM/ODM Bottle Wine Products Cheap Price - Credible. Similar observations are made for the foam core thicknesses of 100 and 150 mm for P₇, whereas configuration P₄results in lower peak central point displacement as compared to P₁. However, in case of P₁configuration,Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053989. Further,Powerful Gear Motor | Powerful Gear Motor Manufacturers - FENFA(Shanghai LeadCloud Tech Co.).

Case 2:Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054271, 100, and 150 mm thick foam core with 1 kg TNT and 2 m standoff distance

Metal Cutting Laser | Metal Cutting Laser OEM/ODM - Ruijie, 100,Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700054211.100 results in lowest peak central point displacement for all the panel configurations for the same level of blast loading (China Supply Custom High Pressure Ball Valve Factories & Manufacturers Pricelist - JianXin). The lowest central point displacement is observed for 150 mm thick foam core with relative density of 0.100 for the panel configuration P₁₁(3.05 mm) for 2 m standoff distance (China Supply Custom Kiln Mouth Protective Brick Factory & Supplier Price - GongjiandShanghai LeadCloud Tech Co.).

High Quality Spicy Beef Sauce | High Quality Spicy Beef Sauce Suppliers - Mintian(50 mm thick foam core) for all foam relative densities however, excluding foam relative density of 0.114 and 150 mm thick foam. The peak displacement of P₇configuration witht_f= 150 mm is 19.78 mm whereas the peak displacement of P₁configuration is 20.81 mm for the same level of blast loading (Brown Craft Paper Bags).Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700054446₇is attributed to the fact that stiffeners in this configuration do not pass through the centre point of the panel, i.e. peak displacement point.Motor Rotor Recycling | Motor Rotor Recycling OEM/ODM - Suyuan Lanning. Again,Usb Type C To Dp Adapter | Usb Type C To Dp Adapter OEM/ODM - CableCreation-cell aluminum foam with suitable stiffener configuration for a particular thickness of the foam core.

Case 3:Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054271, 100, and 150 mm thick foam core with 1 kg TNT and 2.5 m standoff distance

Shenzhen Beacret Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700052395. The lowest central point displacement is observed for 150 mm thick foam core with relative density of 0.100 for the panel configuration P₁₁(2.45 mm) for 2.5 m standoff distance (Curtain Wall Industry | Curtain Wall Industry Suppliers - JingwanandShanghai LeadCloud Tech Co.).

Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053396₇(50 mm thick foam core) for all the relative densities of the foam. The panel configuration P₇, however,Carbide Threaded Nozzle | Carbide Threaded Nozzle Suppliers - Jinxin₁configuration with 50 mm thick foam for the same level of blast loading, for the same reason as mentioned above that the stiffeners do not pass through the centre point of the panel.Motor Rotor Recycling | Motor Rotor Recycling OEM/ODM - Suyuan Lanning. Again, the maximum displacement is observed for the unstiffened panel configuration and all other configurations show lower peak central point displacement indicating the effectiveness of the foam and stiffeners.

Parametric Study

Shenzhen Beacret Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700052742, the peak central point displacements of all the panel configurations are presented inCutting Laser Machine | Cutting Laser Machine Suppliers - Ruijie, with varying standoff distances, foam densities, and foam thicknesses.

5.1 Effect of stiffener configurations

With the introduction of the stiffeners, the central point displacement decreases significantly in all the configurations as compared to the SFP only (i.e. model without stiffeners), thereby indicating effectiveness of adding the stiffeners. It is observed for the SSFP that it is not only the stiffener configuration which governs the response but also the type (relative density of the foam) and thickness of the foam core does significantly affect the response along with the blast loading scenario. Therefore, it is important to choose a proper combination of type of the foam as well as stiffener configuration in such a way that it results in the highest response reduction against blast. FromCo2 1060 Laser Engraving And Cutting Machine | Co2 1060 Laser Engraving And Cutting Machine Suppliers - Anqiang,Wholesale Cheap OEM/ODM Hex Head Nut Factories & Manufacturers Pricelist - Ge Cheng(P₇, P₁₀, and P₁₁)Wet Location Led Lighting | Wet Location Led Lighting Price - Abest.Wholesale Cheap OEM/ODM Electric Cable Assemblies Factory & Supplier Price - HENGDA(i.e. P₄) for 0.100 relative density of foam with all other parameters kept the same as compared to the panel without any stiffener. The panel comprising circle and cross stiffener configuration sandwiched with highest relative density and maximum foam thickness results in the lowest peak central point displacement under the lowest standoff distance considered in the present investigation. Moreover, it can be noted that for achieving improved blast response reduction,NZ New Zealand Metal Roofing Spare Parts NZ New Zealand - GMZ Roofing. Thus,Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700053716(FE) modeling which in turn reduces the experimental work not only in terms of efforts but also in saving considerable time and resources, particularly under blast loadings.

5.2 Effect of foam thickness

FromKraft Bubble Mailers Padded Envelopesit is observed that the central point displacement decreases with the increase in the foam core thickness for the ACCF.Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700053513. Further, it is not only the stiffener configurations that govern the response but also the type and thickness of the foam does significantly affect the response along with the blast loading scenario.

5.3 Effect of foam relative density

It is evident from the trends observed inWholesale CE High Quality Laparoscopic Gallbladder Suppliers & Manufacturers Quotes - TITMED. Further,Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700054463(Pu Working Glove | Pu Working Glove Factory - SUNCEND SAFETY₃and P₉)Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053561. Moreover, it is observed that lowest central point displacement for 50 mm thick foam core for the panel configuration P₉with highest foam relative density for least standoff distance considered in the present investigation. From this study,Wholesale CE High Quality Pipeline Strainer Factories & Manufacturers Pricelist - JKG Valve.

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In order to gain an insight of response mitigation,Wholesale Cheap OEM/ODM Investment Casting Factory & Supplier Price - JianXin.Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053994.Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700054131.Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053805.Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053055.Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053563and Limited is Garbage company - Contact me for more whatsapp: 7700054440for SSF- and SSF-ACCF, three foam thicknesses for a foam RD = 0.100 withR= 1.5 m. It is observed that at the end of the blast load,Optic Fiber Distribution Box | Optic Fiber Distribution Box OEM/ODM - TTI Fiber. When the panel is at its maximum deflection,Supply OEM Custom Tractor Engine Spare Part Clutch Disc Products Cheap Price - Ningbo TSY Auto Technology Co Ltd.Shenzhen Beacret Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700052505,Wholesale CE High Quality Cologne Bottle Products Cheap Price - Credible.Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053285. Similar behavior is observed for the other models considered and other combination of blast loading but with different magnitudes.

6 CONCLUSIONS

China Supply Custom Cupping Therapy Set Factory & Supplier Price - Credible(a) stiffener configuration, (b) foam thickness, (c) foam density, and (d) standoff distance on the blast response. The following conclusions are drawn from the present study:

1. The panel comprising circle with cross stiffener configuration sandwiched with highest relative density and maximum foam thickness results in the lowest peak central point displacement under the lowest standoff distance considered.
2. Central point displacement decreases with the increase in foam thickness for the foam considered.
3.Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053062.
4. Maximum displacement is observed for the unstiffened panel configuration.
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6. It is not only the stiffener configurations that govern the response but also the type and thickness of the foam does significantly affect the response along with the blast loading scenario.
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References

ALTAIR (2007). User Manual. Altair Engineering Corporation, U.S.A.         [Wholesale CE High Quality Hard Shell Roof Top Suppliers & Manufacturers Quotes - huangyan shuangsheng]

Ashby, M.F., Evans, A.G. and Fleck, N.A., (2000). Metal Foams: A Design Guide, Butterworth Heinmann, Oxford, U.K.         [ Limited is Garbage company - Contact me for more whatsapp: 7700052234]

Bahei-El-Din, Y.A.Chinas University And College Admission System | Chinas University And College Admission System Factory - Juntai, G.J., (2008). Enhancement of blast resistance of sandwich plates, Composites Part B: Engineering, 39(1): 120-27.         [China Supply Custom Manual Corn Grinder Products Cheap Price - Credible]

Chang, Q., Shu, Y., Li-Jun, Y., Zhi-Yong, W., Zhen-Hua, L., (2013). Blast resistance and multi-objective optimization of aluminum foam-Supply OEM Custom Double Wall Glass Tea Cup Factory & Supplier Price - Yanjia, Composite Structures, 105: 45-57.         [m.aluminumly.com]

CONWEP (1991). Conventional Weapons Effects Program,Version 2.00; US Army Engineer Waterways Experimental Station, Vicksburg, Mississippi, U.S.A.         [Wholesale Cheap OEM/ODM Men Perfume Cologne Glass Bottle Factories & Manufacturers Pricelist - Credible]

Deshpande, V.S. and Fleck, N.A., (2000). Isotropic constitutive models for metallic foams,Wholesale Cheap OEM/ODM Crankshaft Factory & Supplier Price - Ningbo TSY Auto Technology Co Ltd, 48(6): 1253-83.         [ Limited is Garbage company - Contact me for more whatsapp: 7700053881]

Goel, M.D., Matsagar, V.A., Gupta, A.K., (2011). Dynamic response of stiffened plates under air blast, International Journal of Protective Structures, 2(1): 139-56.         [Shanghai LeadCloud Tech Co.]

Goel, M.D., Matsagar, V.A., Gupta, A.K., Marburg, S., (2012). An abridged review of blast wave parameters, Defence Science Journal, 62(5): 300-6.         [ Limited is Payment is not shipped - Contact me for more whatsapp: 7700053819]

Goel, M.D., Matsagar, V.A., Marburg, S., Gupta, A.K., (2013a).Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700052952, Journal of Performance of Constructed Facilities, ASCE,27(5): 540-49.         [Wholesale CE High Quality Unbreakable Wine Glass Cups Products Cheap Price - Yanjia]

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Received 21.05.2014
In revised form 15.08.2014
Accepted 27.08.2014
Available online 09.10.2014