Crack growth in sandwich-structured foam core graphite epoxy laminate composite using a phase-field modelling approach

IF 3.2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Forces in mechanics Pub Date : 2024-08-01 DOI:10.1016/j.finmec.2024.100284

Manish Singh Rajput, Himanshu Pathak

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引用次数: 0

Abstract

The laminated sandwich composites have wide structure-making applications in the automotive and aviation fields due to their lightweight and superior flexural rigidity properties. Making grooves or holes to assemble more than one structure induces crack discontinuities near the stress concentration region in these sandwich structures. The present work examines the effect of crack discontinuities on the mechanical performance and failure process of the sandwich structures under different loading conditions. Phase field method (PFM) has been presented and implemented using in-house developed MATLAB code. The effect of holes, multiple cracks, number of cores, and loading conditions are analyzed for the mechanical and fracture behavior of the structure. Load-carrying capacity, threshold displacement value for crack initiation, crack propagation trajectory, and energy absorption capacity are compared for various crack discontinuities under different loading conditions. Approximately 35% increase in load carrying capacity is observed in equivalent multiple core sandwich structures.

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采用相场建模方法研究夹层结构泡沫芯材石墨环氧层压复合材料的裂纹生长情况

层压夹层复合材料因其轻质和卓越的抗弯刚度特性，在汽车和航空领域的结构制造中有着广泛的应用。在这些夹层结构的应力集中区域附近开槽或开孔以组装多个结构会导致裂纹不连续。本研究探讨了在不同加载条件下，裂纹不连续性对夹层结构的机械性能和破坏过程的影响。使用内部开发的 MATLAB 代码提出并实施了相场法（PFM）。分析了孔洞、多裂缝、芯材数量和加载条件对结构机械和断裂行为的影响。比较了在不同加载条件下各种裂纹不连续性的承载能力、裂纹阈值位移值、裂纹扩展轨迹和能量吸收能力。在等效多芯夹层结构中，承载能力提高了约 35%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Forces in mechanics Mechanics of Materials

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

52 days