Strain rate effect on mechanical properties of 3D needle-punched C/C composites at different temperatures
Strain rate effect on mechanical properties of 3D needle-punched C/C composites at different temperatures
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不同温度下应变率对3D针刺C/C复合材料力学性能的影响
DOI：
10.1016/j.compositesb.2018.10.044
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发表时间：
2019-03
期刊：
影响因子：
--
通讯作者：
Fan Xueling
中科院分区：
文献类型：
--
作者：
Jin Xiaochao;Hou Cheng;Li Chunling;Wang Xiaobin;Fan Xueling
碳/碳（C/C）复合材料具有优异的室温和高温力学性能，被认为是最有前途的结构材料之一。考虑到C/C复合材料的使用环境，研究其在不同温度下的准静态和动态力学性能具有重要意义。本文详细研究了C/C复合材料在不同应变速率和不同温度下的压缩强度和破坏模式。实验在室温和300 °C下进行，应变速率控制在2.08 × 10−4−1862.09 s−1的宽范围内。结果表明，应变速率和温度对C/C复合材料的破坏模式有明显影响，C/C复合材料的抗压强度随应变速率或温度的升高而显著提高。此外，采用双线性拟合算法，首次建立了不同温度下C/C复合材料的无量纲压缩强度与应变率之间的关系。研究结果可方便地用于工程应用中C/C复合材料抗压强度的预测。
Carbon/carbon (C/C) composites are considered as one of the most promising materials in structural applications owing to their excellent mechanical properties at room and high temperature. Considering their service environments, investigations on the quasi-static and dynamic mechanical properties of C/C composites at different temperatures are of great importance. In this work, the compressive strengths and failure modes of C/C composites under different strain rates and at different temperatures were studied in detail. The experiments were conducted at room temperature and 300 °C with the strain rate controlled over a wide span of 2.08 × 10−4−1862.09 s−1. Results showed that the failure modes of the C/C composites were obviously influenced by the strain rate and temperature, and the compressive strength of the C/C composites significantly increased with the increase of strain rate or temperature. In addition, relationships between the dimensionless compressive strength and strain rate were first established for C/C composites by using a bilinear fitting algorithm at different temperatures. The results can be conveniently used to predict the compressive strength of C/C composites in engineering applications.
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DOI：
10.1016/j.compositesb.2017.10.027
发表时间：
2018-03
期刊：
Composites Part B
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