Mechanical Behavior for 3-D Orthogonal Woven E-Glass/Epoxy Composites
Mechanical Behavior for 3-D Orthogonal Woven E-Glass/Epoxy Composites
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DOI：
10.1177/073168401772678751
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发表时间：
2001-03
影响因子：
3.1
通讯作者：
P. Tan;L. Tong;G. Steven
中科院分区：
文献类型：
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作者：
P. Tan;L. Tong;G. Steven
进行了一项测试计划，以研究 3D 正交编织无碱玻璃/环氧树脂复合材料的机械性能和失效机制，该材料是使用无碱玻璃作为纤维、以 Ciba-Geigy GY260 环氧树脂作为基体制造的。对于力学性能，测试结果表明，在0至4 KN的加载范围内，利用基体表面记录的应变获得的面内杨氏模量和泊松比与填充纱表面记录的接近。然而，对于面内剪切模量，这两个表面的数据之间的差异是明显的。测试的平均弹性常数与使用之前开发的层压块模型预测的结果相当[1]。对于拉伸失效强度，使用混合规则测量的结果和预测的结果之间有相当好的一致性。对试样断裂面的观察表明，对于沿x或y方向切割的试样，其断裂面通常垂直于施加的载荷方向。然而，对于沿着相对于填充纱方向45°切割的样品，断裂面通常平行于填充纱。从样品断裂表面可以明显观察到失效纱线的较大拉拔长度，但对于 3-D 正交编织 CFRP 复合材料没有观察到纱线拉拔长度 [2]。
A testing program is conducted to investigate the mechanical properties and failure mechanism for 3-D orthogonal woven E-glass/epoxy composite materials, which were manufactured using E-glass for fiber and Ciba-Geigy GY260 epoxy for matrix. For the mechanical property, the testing results indicate that at the loading range of 0 to 4 KN, the inplane Young’s modulus and Poisson’s ratio obtained using the strains recorded on the matrix surfaces are close to those recorded on the filler yarn surfaces. However, for the in-plane shear modulus, the difference between data from these two surfaces is obvious. The average elastic constants from the tests compare favorably with the predicted results using the laminate block model developed previously [1]. For the tensile failure strength, there is a reasonably good agreement between the measured and predicted results using the rule of mixture. Observation of the specimen fracture surfaces reveals that for a specimen cut along the x or y direction, its fracture surface is generally perpendicular to the applied loading direction. However, for a specimen cut along the 45° with respect to the stuffer yarn direction, the fracture surface is generally parallel to the stuffer yarn. The larger pullout lengths for the failure yarns are obviously observed from the specimen fracture surfaces, but yarn pullouts were not observed for the 3-D orthogonal woven CFRP composites [2].