Experimental and numerical research on the dynamic response of sandwich structure with M-type foldcore under low-velocity impact

Deng, Yaxin; Yin, Yuan; Hu, Xiaoyu; Li, Xiang

doi:10.1080/15376494.2022.2145533

Cited by 9 publications

(2 citation statements)

References 30 publications

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“…The preparation process of sandwich plates has been described in the literature. 10 The foldcore is prepared by the molding technique, and the sandwich plates are formed by the vacuum bagging method. Moreover, the lay-up sequence of core and panel are [45] 12 and [0] 12 respectively.…”

Section: Preparation Of Test Samplesmentioning

confidence: 99%

The impact response and failure mechanism of sandwich plates with M-type foldcore under low-velocity impact

Deng

Yin

et al. 2023

Jnl of Sandwich Structures & Materials

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Foldcore sandwich structure has promising applications for load-bearing, and in this study, M-type foldcore sandwiches are prepared through a molding and pressing process with fiberglass. To be specific, the sandwich structures are investigated for dynamic response and damage mechanism under low-velocity impacts with various impact positions and energy. The results show that impact position significantly affects the damage mode of the sandwich plate, the damage mode of crush fracture and collapse failure at node position can dissipate higher energy compared with tensile fracture at base position. Moreover, the impact energy shows a certain influence only when the sandwich panel is not penetrated. Besides, numerical prediction closely matches experimental results in terms of load-displacement and energy-displacement histories. Effects of geometric configuration are explored, and the results suggest that although increasing the thickness of panel and core can effectively improve the load-bearing capacity under low energy impacts, increasing the core thickness is a more effective method in lightweight design than increasing the thickness of plane. Furthermore, the impact resistance can be enhanced by selecting the appropriate platform length and narrowing the platform angle. Notably, M-type foldcore sandwich is superior to V-type foldcore sandwich and corrugated sandwich in terms of specific energy absorption.

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Section: Preparation Of Test Samplesmentioning

confidence: 99%

The impact response and failure mechanism of sandwich plates with M-type foldcore under low-velocity impact

Deng

Yin

et al. 2023

Jnl of Sandwich Structures & Materials

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“…The quadratic nominal stress criterion is applied to predict the interface damage onset. 25 The criterion is given by.where τi(i=N,S,T) represents the corresponding strength.…”

Section: Numerical Analysismentioning

confidence: 99%

Post-buckling behavior and failure analysis of asymmetric sandwich panels under uniaxial compression

Wu,

Gu,

Peng

et al. 2023

Jnl of Sandwich Structures & Materials

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Sandwich structures with an asymmetric configuration are employed to introduce in-plane loads as well as to connect them with other structural components. Understanding their failure mechanism is crucial to ensure the safety design of aircraft. This paper investigates experimentally and numerically the mechanical behavior of asymmetric sandwich panels (ASPs) under compression. Quasi-static tests are conducted to obtain the buckling loads, post-buckling behavior, and load-bearing capacity of ASPs. A non-linear finite element (FE) model is developed to elucidate their damage behavior and failure mechanism. Numerical predictions are compared with test results to validate the FE model and failure analysis. The results demonstrate that the presence of a tapered region significantly influences stress distribution and failure initiations. A parametric study is also conducted to investigate the effects of the tapered angle on the compression response of ASPs. The reported results can provide a reference for the optimal design of ASPs.

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Dynamic response of the hybrid honeycomb sandwich panel with zero Poisson’s ratio under low-speed impact

Yu,

2023

Mechanics of Advanced Materials and Structures

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Experimental and numerical research on the dynamic response of sandwich structure with M-type foldcore under low-velocity impact

Cited by 9 publications

References 30 publications

The impact response and failure mechanism of sandwich plates with M-type foldcore under low-velocity impact

The impact response and failure mechanism of sandwich plates with M-type foldcore under low-velocity impact

Post-buckling behavior and failure analysis of asymmetric sandwich panels under uniaxial compression

Dynamic response of the hybrid honeycomb sandwich panel with zero Poisson’s ratio under low-speed impact

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