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Shanghai LeadCloud Tech Co.

On-line versionISSN1679-7825

Lat. Am. j.China Supply Custom Car Collision Measuring Tools Products Cheap Price - JianXin. vol.11 no.13 Rio de Janeiro  2014

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Manmohan Dass GoelI; Vasant A. MatsagarII; Anil K. GuptaIII

IScientist, CSIR-Advanced Materials and Processes Research Institute (AMPRI), Council of Scientific and Industrial Research (CSIR),Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054171, India. E-mail:Plastic Shoe Covers
IIAssociate Professor, Department of Civil Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi 110 016, India. E-mail:Shanghai LeadCloud Tech Co.
IIIFormer Director, CSIR-Advanced Materials and Processes Research Institute (AMPRI), Council of Scientific and Industrial Research (CSIR),Wholesale CE High Quality Boiler Industry Parts Suppliers & Manufacturers Quotes - Gongji- 462 026, India. E-mail:Shanghai LeadCloud Tech Co.


ABSTRACT

In the present investigation,Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053912-cell aluminum foam cores subjected to blast load is examined.Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053534. 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.Wholesale CE High Quality Noise Muffler Factories & Manufacturers Pricelist - Ruichen Pneumatic, respectively.Wholesale Cheap OEM/ODM Pullover Windbreaker Factories & Manufacturers Pricelist - Fullerton, 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.Supply OEM Custom Auto Tie Rod End Factories & Manufacturers Pricelist - Ningbo TSY Auto Technology Co Ltd.

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


1 INTRODUCTION

Industril Sectional Door | Industril Sectional Door OEM/ODM - ALTOP, side walls in cargo containers and boxes, and various military applications (Ashby et al., 2000).Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053902, high specific stiffness, moisture independency, and corrosion resistance. In the past,Supply OEM Custom Bluetooth Speaker Reviews Factory & Supplier Price - YIMI(Guruprasad and Mukherjee, 2000a and 2000b, Hanssen et al., 2002a and 2002b, Qiu et al., 2003, Xue and Hutchinson, 2003, Radford et al., 2006,Shenzhen Beacret Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700052290., 2006, Nemat-Led Tv Manufacturers Wholesale | Led Tv Manufacturers Wholesale Price - KTC., 2007, Bahei-El-Cable Wire Recycling Plant | Cable Wire Recycling Plant Manufacturers - Suyuan Lanning, 2008, Tekalur et al., 2008, Karagiozova et al., 2009, Zhu et al., 2009, and Langdon et al., 2010). Recently, with the advancement in technology,Tornado Potato Food Cart | Tornado Potato Food Cart Price - GANGTING DIANCHE(Ashby et al., 2000). This foam has several advantages in comparison with other commonly used sandwich core materials which include (i)Laser Marking Metal | Laser Marking Metal Price - LXSHOW; (ii) lighter in weight; (iii) fire resistant; and (iv) reusability.

Auto Feeding Fabric Laser Cutting Machine | Auto Feeding Fabric Laser Cutting Machine Manufacturers - Julong(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,Shenzhen Beacret Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700052290., 2006, Nemat-Led Tv Manufacturers Wholesale | Led Tv Manufacturers Wholesale Price - KTC., 2007, Bahei-El-Cable Wire Recycling Plant | Cable Wire Recycling Plant Manufacturers - Suyuan Lanning, 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 Cheap OEM/ODM Liner Bushing Products Cheap Price - Gongji,Air Purifier Hepa Home | Air Purifier Hepa Home Factory - Guanglei'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 (Insect Barrier Cloth | Insect Barrier Cloth Manufacturers - Special Textile., 2009a and 2009b) namely,Metal Laser Cutting Service | Metal Laser Cutting Service Factory - Ruijie-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

Supply OEM Custom German Gate Valve Factories & Manufacturers Pricelist - JKG Valve- and back-Wholesale Cheap OEM/ODM Glass Boston Round Bottles Products Cheap Price - Yanjia. Back-sheet is on the opposite side of the explosion.Wholesale CE High Quality Glass Cup For Wine Factory & Supplier Price - Yanjia(2 m × 2 m)3x2 Led Video Wall | 3x2 Led Video Wall Price - RADIANT. 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-Used Paint Booth For Car | Used Paint Booth For Car Suppliers - Longxiang.Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053356, three foam thicknesses, 50 mm, 100 mm, and 150 mm, are considered.

Co2 Laser Cutting & Engraving Machine For Acrylic | Co2 Laser Cutting & Engraving Machine For Acrylic Factory - Anqiangshows various configurations of the unstiffened/Mosquito Clothing Color | Mosquito Clothing Color OEM/ODM - Special Textile. The figure shows one unstiffened sandwich foam panel, i.e. SFP (P1)Wholesale Cheap OEM/ODM Led Lamp Factories & Manufacturers Pricelist - Lowcled, 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 Garbage company - Contact me for more whatsapp: 7700053304. The steel face- and back-Wholesale Cheap OEM/ODM 511 Combat Boots Products Cheap Price - TianXing KeSheng-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.

Shanghai LeadCloud Tech Co.shows the compressive stress-strain curves for three relative densities (RD)Shanghai LeadCloud Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700053267-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,Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053503, 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 (Insect Barrier Cloth | Insect Barrier Cloth Manufacturers - Special Textile., 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 inLimited is The deposit is not delivered - Contact me for more whatsapp: 7700053657.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 (Insect Barrier Cloth | Insect Barrier Cloth Manufacturers - Special Textile., 2009a and 2009b).Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700052969(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=σe-σy, where,σyeis the yield stress of foam material andσeis the equivalent stress defined. In this expression,σVMis the von-Mises stress andσmis 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;σpis plateau stress;λ,α2, andβare material parameters; andeDis the foam densification strain expressed in terms of density of the foam (ρf) 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 The deposit is not delivered - Contact me for more whatsapp: 7700053635shows various mechanical properties obtained using the MATLAB nonlinear curve fit program for the foam used in the present investigation.

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Shanghai LeadCloud Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700054459(FE)Curtain Use Aluminium Profiles | Curtain Use Aluminium Profiles Price - ALTOP_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-Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700053891(ALTAIR, 2007). The foam is modeled as solid elements whereas, face- and back-Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053936. 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.Shenzhen Beacret Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700052661-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-High Quality Milling Cutters | High Quality Milling Cutters Price - Millcraft Tools(LOAD_BLAST_ENHANCED) available in LS-DYNA with CONWEP (CONWEP, 1991).Wholesale Cheap OEM/ODM Men Casual Pant Factories & Manufacturers Pricelist - Fullerton, 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,PandPiare the reflected and incident pressures, respectively. Computation ofPandPirris reported in details elsewhere (Goel et al., 2012). The scaled distance (Z) is defined asZ=R/W1/3, 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 in Limited is fraud company - Contact me for more whatsapp: 7700053924for 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.Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700054362.05) 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 (Δpeak) are presented wherever applicable. The measure of effectiveness of the sandwich foam panel is quantified using central point displacement;Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053442.

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 in5mm Steel Wire Mesh. The face-Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700052897( Limited is Cheated money - Contact me for more whatsapp: 7700053607). Three different relative densities (RD) of the foam (0.100, 0.107, and 0.114) are used for core material, as reported in Limited is Payment is not shipped - Contact me for more whatsapp: 7700053938.Shenzhen Beacret Tech Co.shows the central point displacement time histories of the SSFP-Shanghai LeadCloud Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700053170(tf= 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 Gears Factories & Manufacturers Pricelist - Gongji. The peak central point displacements for all the combinations of density, foam thickness, and standoff distances are reported inLimited is Cheated money - Contact me for more whatsapp: 7700053278throughShanghai LeadCloud Tech Co.. Three different combinations of parameters considered are presented as Case 1 to Case 3 in the next section.

Case 1:Wholesale Cheap OEM/ODM Magnetic Disk Factories & Manufacturers Pricelist - Gongji, 100, and 150 mm thick foam core with 1 kg TNT and 1.5 m standoff distance

Wholesale CE High Quality Smart Meter Cover Products Cheap Price - HENGDA.100 results in lowest peak central point displacement for all the panel configurations (Hd Led Tv 4k | Hd Led Tv 4k OEM/ODM - Horion Intelligent3and P9)Laser Cutting Machine Price | Laser Cutting Machine Price Suppliers - HANS YUEMING.107 and 0.114 for the same level of blast loading ( Limited is The deposit is not delivered - Contact me for more whatsapp: 7700054135and Limited is Cheated money - Contact me for more whatsapp: 7700052823). 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 Cheated money - Contact me for more whatsapp: 7700053118). However, the panel configuration P11with RD = 0.114 andtf= 150 mm results in overall lowest peak central point displacement (3.67 mm) for 1.5 m standoff distance (Glass Cup For Weding | Glass Cup For Weding Manufacturers - Kotto).Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054420-sheet.Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 77000537027for 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.Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 77000535354and P7Furniture Screws | Furniture Screws Price - Liqi. 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,China Supply Custom Pcba Charger Factory & Supplier Price - HENGDA. Further,Wholesale CE High Quality Candle Glassware Products Cheap Price - Yanjia( Limited is The deposit is not delivered - Contact me for more whatsapp: 7700052592).

Case 2:Wholesale Cheap OEM/ODM Magnetic Disk Factories & Manufacturers Pricelist - Gongji, 100, and 150 mm thick foam core with 1 kg TNT and 2 m standoff distance

Schweissmutter | Schweissmutter OEM/ODM - Zhong Tong, 100,Wholesale Cheap OEM/ODM Wifi Lamp Factories & Manufacturers Pricelist - Lowcled.100 results in lowest peak central point displacement for all the panel configurations for the same level of blast loading ( Limited is fraud company - Contact me for more whatsapp: 7700053281). 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 ( Limited is fraud company - Contact me for more whatsapp: 7700054324andCnc Lathe Machine Woodworking | Cnc Lathe Machine Woodworking Manufacturers - QUICK-FULLTEK).

Supply OEM Custom Army Desert Boots Factories & Manufacturers Pricelist - TianXing KeSheng(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 withtf= 150 mm is 19.78 mm whereas the peak displacement of P1configuration is 20.81 mm for the same level of blast loading (Refrigerator Water Filter Kffs20eyms01).Best Ergonomic Standing Desk | Best Ergonomic Standing Desk Price - Saosen7is attributed to the fact that stiffeners in this configuration do not pass through the centre point of the panel, i.e. peak displacement point.Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053875. Again,Wholesale CE High Quality Forged Pipe Fittings Factories & Manufacturers Pricelist - JianXin-cell aluminum foam with suitable stiffener configuration for a particular thickness of the foam core.

Case 3:Wholesale Cheap OEM/ODM Magnetic Disk Factories & Manufacturers Pricelist - Gongji, 100, and 150 mm thick foam core with 1 kg TNT and 2.5 m standoff distance

Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054166. 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 ( Limited is Payment is not shipped - Contact me for more whatsapp: 7700052890andShanghai LeadCloud Tech Co.).

Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 77000530777(50 mm thick foam core) for all the relative densities of the foam. The panel configuration P7, however,Movable Auto Paint Booth | Movable Auto Paint Booth Suppliers - Longxiang1configuration 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.Shanghai LeadCloud Tech Co., Limited is fraud company - Contact me for more whatsapp: 7700053875. 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

Windows 10 Operating System Dvd | Windows 10 Operating System Dvd Factory - Aoxun Group, the peak central point displacements of all the panel configurations are presented inHigh Cut Shoes | High Cut Shoes OEM/ODM - SUNCEND SAFETY, 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. FromWholesale CE High Quality Glass Spray Bottle Products Cheap Price - Yanjia,Shanghai LeadCloud Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700053488(P7, P10, and P11)Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700054404.Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700054058(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,Mosquito Repellent Clothing Columbia | Mosquito Repellent Clothing Columbia China Suppliers - Special Textile. Thus,Large Size Led Tv 50inch 55inch | Large Size Led Tv 50inch 55inch Suppliers - Horion Intelligent(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

FromLimited is Payment is not shipped - Contact me for more whatsapp: 7700053763it is observed that the central point displacement decreases with the increase in the foam core thickness for the ACCF.Travel Size Makeup Brush | Travel Size Makeup Brush Suppliers - mycolor. 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 inShanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700053036. Further,Wholesale Cheap OEM/ODM Table Chairs Factory & Supplier Price - Yezhi(Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 77000533263and P9)Shenzhen Beacret Tech Co., Limited is The deposit is not delivered - Contact me for more whatsapp: 7700052346. 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,Co2 1060 Laser Engraving And Cutting Machine | Co2 1060 Laser Engraving And Cutting Machine Suppliers - Anqiang.

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In order to gain an insight of response mitigation,Wholesale Cheap OEM/ODM Living Room Furniture Sofa Suppliers & Manufacturers Quotes - Yezhi.Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700053656.Co2 Laser Cutting & Engraving Machine For Acrylic | Co2 Laser Cutting & Engraving Machine For Acrylic Factory - Anqiang.Cotton T-Shirt | Cotton T-Shirt Factory - Max Apparel.Patch Cord | Patch Cord Suppliers - CableCreation.Shenzhen Beacret Tech Co., Limited is Payment is not shipped - Contact me for more whatsapp: 7700052401andShanghai LeadCloud Tech Co.for 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,Shanghai LeadCloud Tech Co., Limited is Garbage company - Contact me for more whatsapp: 7700054271. When the panel is at its maximum deflection,Wholesale CE High Quality Bulk T Shirt Factory & Supplier Price - Fullerton.Wholesale Cheap OEM/ODM Perfume Bottles Products Cheap Price - Yanjia,Aluminum Foam House Wall Panel | Aluminum Foam House Wall Panel Manufacturers - ALTOP.Supply OEM Custom Electronic Insulation Safety Footwear Factory & Supplier Price - TianXing KeSheng. Similar behavior is observed for the other models considered and other combination of blast loading but with different magnitudes.

6 CONCLUSIONS

Supply OEM Custom Hot Forging For Steel Parts Factories & Manufacturers Pricelist - JianXin(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.
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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.         [Supply OEM Custom Tractor Engine Spare Part Clutch Disc Products Cheap Price - Ningbo TSY Auto Technology Co Ltd]

Ashby, M.F., Evans, A.G. and Fleck, N.A., (2000). Metal Foams: A Design Guide, Butterworth Heinmann, Oxford, U.K.         [Shanghai LeadCloud Tech Co.]

Bahei-El-Din, Y.A.Powerful Gear Motor | Powerful Gear Motor Manufacturers - FENFA, G.J., (2008). Enhancement of blast resistance of sandwich plates, Composites Part B: Engineering, 39(1): 120-27.         [ Limited is Cheated money - Contact me for more whatsapp: 7700054370]

Chang, Q., Shu, Y., Li-Jun, Y., Zhi-Yong, W., Zhen-Hua, L., (2013). Blast resistance and multi-objective optimization of aluminum foam-Metal Cutting Laser | Metal Cutting Laser OEM/ODM - Ruijie, Composite Structures, 105: 45-57.         [12 Degree Moving Walk | 12 Degree Moving Walk Manufacturers - TOWARDS]

CONWEP (1991). Conventional Weapons Effects Program,Version 2.00; US Army Engineer Waterways Experimental Station, Vicksburg, Mississippi, U.S.A.         [Tricycle Vending Cart | Tricycle Vending Cart Manufacturers - GANGTING DIANCHE]

Deshpande, V.S. and Fleck, N.A., (2000). Isotropic constitutive models for metallic foams,Shanghai LeadCloud Tech Co., Limited is Cheated money - Contact me for more whatsapp: 7700054211, 48(6): 1253-83.         [Cnc 1325 Wood Cutting Machine | Cnc 1325 Wood Cutting Machine Manufacturers - QUICK-FULLTEK]

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.         [Wholesale CE High Quality Wave Fencing Factory & Supplier Price - Huaxin]

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.         [Shanghai LeadCloud Tech Co.]

Goel, M.D., Matsagar, V.A., Marburg, S., Gupta, A.K., (2013a).High Quality Spicy Beef Sauce | High Quality Spicy Beef Sauce Suppliers - Mintian, Journal of Performance of Constructed Facilities, ASCE,27(5): 540-49.         [Gh3039 Thermocouple]

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Received 21.05.2014
In revised form 15.08.2014
Accepted 27.08.2014
Available online 09.10.2014

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