Investigation on manufacturing and mechanical behavior of all-composite sandwich structure with Y-shaped cores
Investigation on manufacturing and mechanical behavior of all-composite sandwich structure with Y-shaped cores
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DOI：
10.1016/j.compscitech.2018.01.026
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发表时间：
2018-05-03
影响因子：
9.1
通讯作者：
Huang, Wei
中科院分区：
文献类型：
--
作者：
Liu, Jialin;Liu, Jiayi;Huang, Wei
设计并采用热压成型方法制备了一种新型的Y型芯层全复合材料夹层结构。为了揭示相对密度对力学性能的影响，对相对密度为5.34%~ 10.53%的复合材料夹层结构进行了面外压缩试验。研究分析了相对密度对试件破坏形态、力学性能、应力-应变曲线和能量吸收能力的影响。结果表明，相对密度对夹层结构的力学性能有明显的影响。应力-应变曲线呈双峰特征，峰值应力随相对密度的增大而增大。为了揭示材料的损伤演化过程和预测材料的力学性能，建立了基于渐进损伤模型的数值模拟方法。对Y型芯的抗压强度和刚度进行了解析预测，并与数值计算结果和试验结果进行了比较。结果表明，理论预测和数值计算结果与实验结果吻合较好。(C)2018爱思唯尔有限公司版权所有
A novel all-composite sandwich structure with Y-shaped cores was designed and fabricated by hot-press molding method in this paper. In order to reveal effects of relative density on mechanical behavior, the out-of-plane compressive tests were carried out on composite sandwich structures with different relative densities, varying from 5.34% to 10.53%. Then the effects of relative density on failure modes, mechanical properties, stress-strain curves and energy absorption capacity were studied and analyzed. The results showed that the relative density had visible impact on mechanical behavior of sandwich structure. The stress-strain curves possessed the characteristic of two peaks, and the peak stresses increased as the relative density increased. The numerical simulation based on progressive damage model was developed to reveal the damage evolution process and predict the mechanical properties. Analytical predictions were also presented to predict the compressive strength and stiffness of Y-shaped core, which were compared with numerical results and experimental results. It was observed that the analytical predictions and numerical results were in good agreement with the experimental results. (C) 2018 Elsevier Ltd. All rights reserved.