A CEL study of dynamic slamming response and failure mechanism on corrugated core composite-metal sandwich structures

Polymethacrylimide (PMI) foams have been widely applied in aerospace engineering as the core material of sandwich structures. This paper proposes a modified model to predict the constitutive relation of PMI foams and compares it to existing testing data. The study is then applied to the investigation of the failure mechanism of PMI foam core sandwich beams in bending. Corresponding bending tests were carried out where a complex failure process was observed through a high-speed camera. Numerical model of the foregoing sandwich beam is developed, in which the maximum principal stress criteria is used to predict damage propagation in PMI foam core. Both results from tests and numerical simulation validate the reliability of the theoretical prediction of the failure of PMI foam core sandwich beam using the proposed modified model of PMI foams. This study provides a theoretic tool for the design of sandwich structures with PMI foam core.

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Failure Mechanism in Rigid PUF Sandwich Structures with Varied Skin Materials under Bending Load

Journal of Reinforced Plastics and Composites ◽

10.1177/0731684409337547 ◽

2009 ◽

Vol 29 (11) ◽

pp. 1626-1640 ◽

Cited By ~ 4

Author(s):

K.V. Arun ◽

S. Manjunath Yadav ◽

Chandradharappa ◽

S. Basavarajappa ◽

M. Krishna

Keyword(s):

Failure Mechanism ◽

Sandwich Structures ◽

Bending Load

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Coupled Eulerian-Lagrangian (CEL) characterization of slamming response and failure mechanism on corrugated sandwich structures

Applied Ocean Research ◽

10.1016/j.apor.2021.102862 ◽

2021 ◽

Vol 116 ◽

pp. 102862

Author(s):

Wentao He ◽

Xiaofei Cui ◽

Changzi Wang ◽

Junlin Deng ◽

Qi Hu ◽

...

Keyword(s):

Failure Mechanism ◽

Sandwich Structures

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The effect of temperature on the bending properties and failure mechanism of composite truss core sandwich structures

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2015.09.017 ◽

2015 ◽

Vol 79 ◽

pp. 146-154 ◽

Cited By ~ 69

Author(s):

Jiayi Liu ◽

Linling Xiang ◽

Tao Kan

Keyword(s):

Failure Mechanism ◽

Sandwich Structures ◽

Effect Of Temperature ◽

Bending Properties ◽

Truss Core

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3D printed meta-sandwich structures: Failure mechanism, energy absorption and multi-hit capability

Materials & Design ◽

10.1016/j.matdes.2018.08.061 ◽

2018 ◽

Vol 160 ◽

pp. 179-193 ◽

Cited By ~ 37

Author(s):

H. Yazdani Sarvestani ◽

A.H. Akbarzadeh ◽

A. Mirbolghasemi ◽

K. Hermenean

Keyword(s):

Failure Mechanism ◽

Energy Absorption ◽

Sandwich Structures ◽

3D Printed

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On the role of tin underlays for the prevention of thermal grooving in thin gold films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100145030 ◽

1986 ◽

Vol 44 ◽

pp. 732-733

Author(s):

Jin Young Kim ◽

R. E. Hummel ◽

R. T. DeHoff

Keyword(s):

Thin Film ◽

Free Surface ◽

Grain Boundary ◽

Beneficial Effect ◽

Failure Mechanism ◽

Failure Mechanisms ◽

Distinct Advantage ◽

Gold Films ◽

Gold Thin Film

Gold thin film metallizations in microelectronic circuits have a distinct advantage over those consisting of aluminum because they are less susceptible to electromigration. When electromigration is no longer the principal failure mechanism, other failure mechanisms caused by d.c. stressing might become important. In gold thin-film metallizations, grain boundary grooving is the principal failure mechanism.Previous studies have shown that grain boundary grooving in gold films can be prevented by an indium underlay between the substrate and gold. The beneficial effect of the In/Au composite film is mainly due to roughening of the surface of the gold films, redistribution of indium on the gold films and formation of In2O3 on the free surface and along the grain boundaries of the gold films during air annealing.

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