复合材料波纹板准静态轴压性能试验及数值模拟

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (15) : 156-164.

论文

肖培,苏璇,牟浩蕾,解江,冯振宇

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Quasi-static axial compression performance tests and numerical simulation for composite corrugated plate

XIAO Pei, SU Xuan, MOU Haolei, XIE Jiang, FENG Zhenyu

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摘要

以［+45/-45］4s和［0/+45/-45/0］2s碳纤维增强复合材料波纹板为研究对象，通过准静态轴压试验获得其失效形貌及载荷-位移曲线；通过CT扫描分析其破坏机理，基于吸能特性评价指标进一步研究其吸能特性。针对［0/+45/-45/0］2s波纹板，建立考虑层间模型的多层壳模型进行轴压仿真，通过对比失效形貌、载荷-位移曲线及吸能特性评价指标来验证有限元模型。试验结果表明：［+45/-45］4s波纹板出现整体失稳现象，材料利用率较低导致其吸能特性较差，且试验获得的比吸能的离散系数大于15%，试验重复性较差。［0/+45/-45/0］2s波纹板为典型的层束张开失效模式，材料利用率较高导致其吸能特性较好，吸能特性评价指标的离散系数均小于15%，具有良好的轴压稳定性与可重复性。在±45°纤维铺层中增加0°纤维铺层，可改变其轴压失效模式，并显著提升其轴压吸能特性。仿真结果表明：多层壳模型能较好地复现［0/+45/-45/0］2s波纹板轴压过程及层束张开失效模式；同时仿真获得的比吸能比试验均值高2.27%，能较好地复现［0/+45/-45/0］2s波纹板轴压吸能特性，从而验证了多层壳模型。

Abstract

Here, the failure morphology and load-displacement curve of ［+45/-45］4s and ［0/+45/-45/0］2s carbon fiber reinforced composite corrugated plates were obtained with quasi-static axial compression tests. Their failure mechanism was analyzed using CT scanning. Their energy absorption characteristics were further studied with evaluation indexes of energy absorption characteristics. For ［0/+45/-45/0］2s corrugated plate, the multi-layer shell finite element (FE) model considering interlayer model was established to do axial compression simulation. The FE model was verified through comparing the simulation results of failure morphology, load-displacement curve and energy absorption characteristics evaluation indexes with test results of those. The test results showed that the overall instability of ［+45/-45］4s corrugated plate occurs, and the lower material utilization rate leads to poorer energy absorption characteristics, the dispersion coefficient of the specific energy absorption (SEA) obtained in tests is more than 15%, so the test repeatability is poorer; ［0/+45/-45/0］2s corrugated plate is a typical failure mode of layer-bundle opening, and the higher material utilization rate leads to better energy absorption characteristics, dispersion coefficients of energy absorption evaluation indexes all are less than 15%, so this plate has good axial compression stability and repeatability, adding 0° fiber layer into ±45° fiber layers can change the plate’s axial compression failure mode and significantly improve its axial compression energy absorption characteristics. The simulation results showed that the multi-layer shell FE model can reproduce axial compression process and layer-bundle opening failure mode of ［0/+45/-45/0］2s corrugated plate; the SEA obtained using simulation is 2.27% higher than the test average value, so simulation can better reproduce axial compression energy absorption characteristics of ［0/+45/-45/0］2s corrugated plate to verify the multi-layer shell model.

导出引用

肖培,苏璇,牟浩蕾,解江,冯振宇. 复合材料波纹板准静态轴压性能试验及数值模拟[J]. 振动与冲击, 2021, 40(15): 156-164

XIAO Pei, SU Xuan, MOU Haolei, XIE Jiang, FENG Zhenyu. Quasi-static axial compression performance tests and numerical simulation for composite corrugated plate[J]. Journal of Vibration and Shock, 2021, 40(15): 156-164

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