STUDY ON EDGEWISE COMPRESSION PERFORMANCE OF HONEYCOMB SANDWICH STRUCTURE WITH SCRATCH DAMAGE

Abstract

Abstract: The progressive damage analysis model of honeycomb sandwich structure with plain braided panel is established. The lateral strength and failure mode of honeycomb sandwich structure with scratch damage on one side panel are studied. The results are compared with the experiments to verify the correctness of the model. Considering the high material nonlinearity of the model, ABAQUS/Explicit solver is used to simulate the quasi-static lateral compression of honeycomb sandwich structure. By compiling VUMAT subroutine, failure criteria and stiffness degradation models of panel and core are set respectively, and cohesion model is used to simulate the adhesive layer to complete progressive damage analysis of honeycomb sandwich structure subjected to lateral compression. The results show that the buckling behavior of the unilateral plate without damage will occur when the failure occurs, which will increase the stress outside the honeycomb core surface and lead to the damage of the honeycomb core. The longitudinal compression failure of fiber and the longitudinal shear failure of the fiber-matrix will occur on one side plate with surface scratches, and the failure will extend from the vicinity of the scratch area to both sides along the scratch direction.

Key words: plain weave honeycomb sandwich structure, progressive damage model, VUMAT subroutine, scratch, edgewise compressive strength

CLC Number:

TB332

ZHOU Chun-ping, LIU Wu-shuai, WANG Xuan, CAO Yang-li. STUDY ON EDGEWISE COMPRESSION PERFORMANCE OF HONEYCOMB SANDWICH STRUCTURE WITH SCRATCH DAMAGE[J]. Fiber Reinforced Plastics/Composites, 2019, 0(7): 5-10.

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