Response of composite sandwich beams with graded lattice core
Response of composite sandwich beams with graded lattice core
复制标题
梯度晶格芯复合材料夹层梁的响应
DOI：
10.1016/j.compstruct.2014.09.042
复制
发表时间：
2015-01-01
影响因子：
6.3
通讯作者：
Fang, Dai-ning
中科院分区：
文献类型：
--
作者：
Xu, Guo-dong;Zhai, Jun-jun;Fang, Dai-ning
本文提出了一种将梯度材料与网格芯材相结合，采用缝合热压工艺制备梯度网格芯材夹层结构的新思想。在弯曲载荷下的机械强度和失效机制进行了估计。简单的力学分析是有效的和准确的评估的性能和破坏模式的夹层板。为了验证几何参数对梯度格芯夹芯板弯曲性能的敏感性，制备了4种具有代表性的梯度格芯夹芯板，并进行了不同破坏模式的试验研究。强度的预测与调查的测量结果相比非常好。确定了梯度格构夹芯板的优化设计。考虑了六种失效机制的约束函数。对最佳工艺参数和最小重量进行了评价。所有设计在单位重量承载力和破坏机理上有很大差异。(C)2014爱思唯尔有限公司版权所有。
This study introduces a new idea that combining graded material and lattice core for forming the graded lattice core sandwich structures, which is based on the stitching and hot-press process. The mechanical strengths and failure mechanisms under bending load are estimated. The simple mechanical analysis is effective and accurate for estimating the performance and failure mode of the sandwich panels. In order to demonstrate sensitivity of geometric parameters on the bending behavior of graded lattice core sandwich panels, four kinds of representative graded lattice core sandwich panels were fabricated and tested to probe different failure modes. The predictions of strength compared very well with measurements investigated. The optimal designs of the graded lattice core sandwich panels were determined. Six constraint functions on failure mechanisms were considered. The optimum parameters and minimum weight were evaluated. All the designs had great difference in their load capacity-per-weight and the failure mechanisms. (C) 2014 Elsevier Ltd. All rights reserved.