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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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SiCf/TC17复合材料拉伸行为研究
DOI: 10.11900/0412.1961.2015.00127, PP. 1025-1037
Keywords: 钛基复合材料,SiC纤维,拉伸性能,断裂机制,断裂过程
Abstract:
研究了SiCf/TC17复合材料的室温、高温(773K)拉伸性能及其断裂机制.结果表明SiCf/TC17复合材料室温、高温应力-应变曲线受纤维线弹性变形和基体屈服程度影响呈现不同的形状;室温断裂机制主要是反应层多次断裂、纤维一次断裂和基体脆性断裂等,高温断裂机制主要是纤维多次断裂、基体韧性断裂和大范围的界面脱黏等;纤维累计损伤理论适合于对SiCf/TC17复合材料断裂强度的估测,其中室温断裂强度符合临界断裂纤维数大于或等于3时的局部承担载荷模型,高温断裂强度符合均匀承担载荷模型.结合断裂机制和强度估算结果,详细论述了SiCf/TC17复合材料室温、高温拉伸断裂过程.
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