Statistical approach to the relationship between ILSS and void content of CFRP
Statistical approach to the relationship between ILSS and void content of CFRP
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DOI：
10.1016/0266-3538(86)90018-7
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发表时间：
1986
影响因子：
9.1
通讯作者：
H. Yoshida;T. Ogasa;R. Hayashi
中科院分区：
文献类型：
--
作者：
H. Yoshida;T. Ogasa;R. Hayashi
摘要研究了碳纤维增强塑料（CFRP）复合材料（包括碳-环氧树脂（C-E）和碳-不饱和聚酯（C-P））层间剪切强度（ILSS）随空隙率的变化规律。为了获得包含宽范围的空隙含量的试样，在制造复合材料之前，在每个层之间喷射少量的发泡剂。对每个样品进行ILSS和空隙率之间关系的回归分析。利用回归直线和方差分析程序计算了复合材料质量评价所需的空隙率标准Vcr。C-E和C-P试样的孔隙率标准分别为Vcr = 0.5%和Vcr = 1%。为了找到空隙对CFRP力学可靠性的影响，使用统计技术分析了存活概率Q v。它已被确定，Q v值随空隙含量的增加而减小，这种减少的功能在很大程度上取决于工作应力和标准误差之间的回归线和ILSS的测量值。
Abstract Effects of the void content on the interlaminar shear strength (ILSS) of carbon-fibre-reinforced plastics (CFRP), including carbon-epoxy (C–E) and carbon-unsaturated polyester (C–P) composites, have been investigated. In order to obtain specimens containing a wide range of void contents, a small quantity of foaming agent was sprayed between each lamina prior to fabrication of the composites. A regression analysis of the relationship between ILSS and void content was performed for each sample. A void content criterion V cr which is required for quality evaluation of composites was calculated using the regression lines and the procedures of analysis of variance. The void content criteria were V cr= 0· 5% and V cr= 1% for C–E and C–P specimens, respectively. In order to find effects of voids on the mechanical reliability of CFRP, the probability of survival, Q v, was analysed using a statistical technique. It has been determined that the value of Q v decreases with increasing void content, and features of this reduction depend considerably on the working stress and the standard error between the regression line and the measured value of ILSS.