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首页> 外文会议>Annual technical conference of the Society of Plastics Engineers;ANTEC 2011 >TENSILE BEHAVIOR OF SYMMETRIC AND ASYMMETRIC STRUCTURAL COMPOSITE FOAMS
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TENSILE BEHAVIOR OF SYMMETRIC AND ASYMMETRIC STRUCTURAL COMPOSITE FOAMS

机译：对称和非对称结构复合泡沫塑料的拉伸行为

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摘要

Symmetric and asymmetric structural composite foams were produced by enclosing a foamed core between two composite skins. The effect of each layer thickness and composition was studied by using different amounts of chemical blowing agent (1 and 1.5%wt) and flax fibres (0, 15, 30%wt). The samples were produced by compression molding and characterized in terms of tension. Videos were also taken to determine the relations between stress-strain curves and changes in sample structure. The results show that for symmetric structures, both skins break simultaneously, whereas asymmetric foams present two consecutive skin breaks. From the stress-strain curves, several parameters are reported and discussed: Young's modulus, yield stress and the strain at which each layer breaks. As expected, increasing CBA content decreased all the properties, while increasing fibre content led to higher Young's modulus and lower strain at break.
机译：通过将泡沫芯包裹在两个复合蒙皮之间来生产对称和非对称结构的复合泡沫。通过使用不同量的化学发泡剂（1和1.5％wt）和亚麻纤维（0、15、30％wt）来研究各层厚度和组成的影响。样品是通过压缩成型生产的，并具有拉伸特性。还拍摄了视频以确定应力应变曲线与样品结构变化之间的关系。结果表明，对于对称结构，两个表皮同时破裂，而非对称泡沫则出现两个连续的表皮破裂。根据应力-应变曲线，报告并讨论了几个参数：杨氏模量，屈服应力和每一层破裂的应变。不出所料，增加CBA含量会降低所有性能，而增加纤维含量会导致较高的杨氏模量和较低的断裂应变。

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