Wu Weili, Wang Qingtao, Li Wei
College of Textiles, Donghua University, No. 2999, Northern Renmin Rd., Songjiang District, Shanghai 201620, China.
Key Lab of Textile Science & Technology, Ministry of Education, Shanghai 201620, China.
Materials (Basel). 2018 Jun 28;11(7):1105. doi: 10.3390/ma11071105.
Tensile and compressive properties of interlayer and intralayer hybrid composites were investigated in this paper. The tensile modulus and compression modulus of interlayer and intralayer hybrid composites are the same under the same mixed ratio, the tensile strength is much superior to the compression strength, and while the tensile modulus and strength increase along with the carbon fiber content, the compression values change slightly. The influence of stacking structures on the tensile and compressive strengths is opposite to the ratio of T/C (tensile/compression) strength for interlayer hybrid composites, and while the tensile and compression strengths with glass fiber sandwiching carbon fiber can reach the maximum value, the ratio of T/C strength is minimum. For structures with carbon fiber sandwiching glass fiber, or with asymmetric structures, the tensile and compressive strengths are at a low value. For intralayer hybrid structures, while the carbon/glass (C/G) dispersion degree is high, the tensile and compression strengths are low. The experimental tensile and compressive strengths for interlayer and intralayer hybrid composites are greater than the theoretical values, which demonstrates that strength conforms well to the positive hybrid effect. The tensile fracture strain is greater than the compression fracture strain for hybrid composites, with both of them basically maintained at the same level.
本文研究了层间和层内混杂复合材料的拉伸和压缩性能。在相同混合比例下，层间和层内混杂复合材料的拉伸模量和压缩模量相同，拉伸强度远优于压缩强度，且随着碳纤维含量的增加，拉伸模量和强度增大，而压缩值变化较小。对于层间混杂复合材料，堆叠结构对拉伸和压缩强度的影响与拉伸/压缩（T/C）强度比相反，当玻璃纤维夹在碳纤维中间时，拉伸和压缩强度可达到最大值，而T/C强度比最小。对于碳纤维夹在玻璃纤维中间的结构或不对称结构，拉伸和压缩强度较低。对于层内混杂结构，当碳/玻璃（C/G）分散程度较高时，拉伸和压缩强度较低。层间和层内混杂复合材料的实验拉伸和压缩强度大于理论值，这表明强度很好地符合正混杂效应。混杂复合材料的拉伸断裂应变大于压缩断裂应变，两者基本保持在同一水平。
