Finite element analysis of the dynamic response of clamped sandwich beams subject to shock loading

Qiu, Xinming; Deshpande, V.S.; Fleck, N.A.

doi:10.1016/j.euromechsol.2003.09.002

Cited by 131 publications

(65 citation statements)

References 5 publications

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“…Qiu et al [2004;2005a] developed an analytical model for the deformation response of clamped circular sandwich plates subjected to shock loading in air and in water. This model was verified using finite elements in [Qiu et al 2003] and then used to define a systematic design procedure [Fleck and Deshpande 2004a]. Liang et al [2007] used an analytic model based on the relative time scales for core crushing and water cavitation to evaluate the mechanical performance of different core topologies.…”

Section: Introductionmentioning

confidence: 99%

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Mori

Lee

Xue

et al. 2007

JOMMS

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Sandwich panel structures with thin front faces and low relative density cores offer significant impulse mitigation possibilities provided panel fracture is avoided. Here steel square honeycomb and pyramidal truss core sandwich panels with core relative densities of 4% were made from a ductile stainless steel and tested under impulsive loads simulating underwater blasts. Fluid-structure interaction experiments were performed to (i) demonstrate the benefits of sandwich structures with respect to solid plates of equal weight per unit area, (ii) identify failure modes of such structures, and (iii) assess the accuracy of finite element models for simulating the dynamic structural response. Both sandwich structures showed a 30% reduction in the maximum panel deflection compared with a monolithic plate of identical mass per unit area. The failure modes consisted of core crushing, core node imprinting/punch through/tearing and stretching of the front face sheet for the pyramidal truss core panels. Finite element analyses, based on an orthotropic homogenized constitutive model, predict the overall structural response and in particular the maximum panel displacement.

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Section: Introductionmentioning

confidence: 99%

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Mori

Lee

Xue

et al. 2007

JOMMS

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“…These panels possess excellent properties such as lightweight, high specific stiffness, moisture independency, and corrosion resistance. In the past, several researchers studied blast response of the sandwich foam panels and presented the effectiveness of these panels under blast loading (Guruprasad and Mukherjee, 2000aand 2000b, Hanssen et al, 2002aand 2002b, Qiu et al, 2003, Xue and Hutchinson, 2003, Radford et al, 2006, Sriram et al, 2006, Nemat-Nasser et al, 2007, Bahei-El-Din and Dvorak, 2008, Tekalur et al, 2008, Karagiozova et al, 2009, Zhu et al, 2009, and Langdon et al, 2010. Recently, with the advancement in technology, metal foam has emerged as an important material in blast resistance applications due to their high energy absorption potential (Ashby et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Most of the past research work has been carried out on the sandwich foam panels with different varieties of core ranging from fiber reinforced polymer (FRP), natural material (air, sand/soils), polymeric foams, honeycombs and commercially available metal foams (Hanssen et al, 2002aand 2002b, Qiu et al, 2003, Xue and Hutchinson, 2003, Radford et al, 2006, Sriram et al, 2006, NematNasser et al, 2007, Bahei-El-Din and Dvorak, 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, have been reported on the stiffened sandwich foam panels and their blast response, except author's recent work on the response of stiffened polymer foam sandwich structures under impulsive loading (Goel et al, 2013a).…”

Section: Introductionmentioning

confidence: 99%

Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

Goel

Matsagar

Gupta

2014

Lat. Am. j. solids struct.

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In the present investigation, response of the stiffened sandwich foam panels with closed-cell aluminum foam cores subjected to blast load is examined. The panels have the metal foam sandwiched between two steel sheets. 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. Finite element based numerical simulations for dynamic analysis are performed employing a combination of shell and solid elements for steel sheets and metal foam, respectively. Quantitative assessment of dynamic response of the sandwich foam panels is made, 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. Results indicate that the provision of stiffeners along with metal foam considerably increases blast resistance as compared to the unstiffened panels with the metal foam.

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“…Recent studies have indicated the advantage of well-designed metal sandwich plates over solid plates under high intensity dynamic loading, where combinations of high strength and energy absorption are vital for the structural performance [Qiu et al 2003;Xue and Hutchinson 2004a;Fleck and Deshpande 2004;Rathbun et al 2006;. Metal sandwich plates encompass further advantages when the high intensity loading is transmitted through water, which can make them an excellent choice for ship protection [Xue and Hutchinson 2003;Liang et al 2007].…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior and constitutive modeling of metal cores

Vaziri

Xue

2007

JOMMS

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Studying the mechanical behavior of metal cores provides insight into the overall performance of structures comprising metal sandwich plates, and can help immensely in designing metal sandwich plates for specific engineering applications. In this study, the response of folded (corrugated) plate and pyramidal truss cores are explored under both quasistatic and dynamic loadings. In particular, two important characteristics of metal cores, the nonuniform hardening/softening evolution due to stressing in different directions and the rate-dependence, are discussed for different core topologies, including the square honeycomb core. In addition, the role of core behavior on the overall performance of sandwich plates is studied by employing a constitutive model for the elastic-plastic behavior of plastically compressible orthotropic materials [Xue et al. 2005]. The constitutive model is capable of capturing both the anisotropy of the core, associated with stressing in different directions, and its rate-dependence. The approach, based on employing the core constitutive model, not only significantly reduces the computation time, but also permits exploration of the role of each fundamental rate-dependent response of the metal core on the overall response of the metal sandwich plates.

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Finite element analysis of the dynamic response of clamped sandwich beams subject to shock loading

Cited by 131 publications

References 5 publications

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

Mechanical behavior and constitutive modeling of metal cores

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