聚氨酯硬质泡沫材料本构研究及其在夹芯板中的应用.pdf

文档介绍：聚氨酯硬质泡沫材料本构研究及其
在夹芯板中的应用*
秦培成查晓雄于航
( 哈尔滨工业大学深圳研究生院城市与土木学科部深圳 510085)
摘要: 为了研究聚氨酯硬质泡沫材料的应力- 应变特性及泊松比, 对聚氨酯硬质泡沫材料在室温下进
行了加载速率为 2 mmPmin 准静态拉伸、压缩、剪切试验。结果表明, 聚氨酯聚氨酯硬质泡沫材料在抗压方面
有良好的延性性能, 而在抗拉、抗剪方面则表现为明显的脆性; 泊松比则具有一定的离散性, 一般约 0. 25 左
右; 另外, 基于其应力- 应变关系曲线, 对其本构关系进行拟和回归, 并将其应用到金属夹芯板试验有限元模
拟中来, 结果表明: 有限元模拟结果与试验结果有较好的吻合。
关键词: 拉伸压缩剪切应力应变
STUDY ON POLYURETHANE FOAM MATERIAL CONSTITUTIVE RELATION
AND IT. S APPLICATION IN SANDWICH PANELS
Qin Peicheng Zha Xiaoxiong Yu Hang
( Civil Engineering of Shenzhen Graduate School, Harbin Institute of Technology Shenzhen 510085)
Abstract : In order to investigate the stress- strain relationship and Poisson. s ratio of the polyurethane foam material, the
quas-i static tensile, compression, and shear test was conducted at room temperature with the loading speed 2mmPmin and
the results show that, the material has an excellent ductility behavior pression, but on tension and shearing, it. s
obviously brittle; the Poisson. s ratio is somewhat discrete, it. s about 0. 25. In addition, based on it. s stress-strain
relationship curves, a simple fitting constitutive relation is given. By the constitutive relation a FEM model is got to simulate
the experiment, and the results show the validity of the constitutive relation model.
Keywords : pression shearing stress strain
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