| 三维针刺碳纤维增强SiC复合材料在加载-卸载下的拉伸行为 |
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| 引用本文： | 聂景江,徐永东,万玉慧,张立同,成来飞,马军强.三维针刺碳纤维增强SiC复合材料在加载-卸载下的拉伸行为[J].硅酸盐学报,2009,37(1). |
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| 作者姓名： | 聂景江 徐永东 万玉慧 张立同 成来飞 马军强 |
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| 作者单位： | 西北工业大学超高温结构复合材料国防科技重点实验室,西安,710072 |
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| 摘 要： | 对T300碳纤维增强三维针刺碳纤维增强SiC(C/SiC)复合材料(纤维体积含量为30%)的单调和加载-卸载拉伸载荷下的拉伸行为进行了研究.结果表明:T300碳纤维增强三维针刺C/SiC复合材料的拉伸强度和断裂应变分别为129.6MPa和0.61%.单调和加载-卸载拉伸应力-应变曲线均为非线性变化,主要是复合材料中裂纹的扩展,界面相脱黏和滑移,以及纤维的逐步断裂和拔出所致,使得复合材料在拉伸载荷下呈非脆性破坏.卸载应力水平对卸载后的残余应变和再加载模量有较大影响.卸载应力小于80 MPa时,随着卸载应力的增加,残余应变线性增加,模量线性降低:卸载应力高于80MPa时,二者随着卸载应力的增加而呈二次函数快速变化.
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| 关 键 词： | 三维针刺 碳/碳化硅复合材料 加载卸载 拉伸行为 |
TENSILE BEHAVIOR OF THREE-DIMENSIONAL NEEDLED CARBON FIBER REINFORCED SiC COMPOSITE UNDER LOAD-UNLOAD |
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| NIE Jingjiang,XU Yongdong,WAN Yuhui,ZHANG Litong,CHENG Laifei,MA Junqiang.TENSILE BEHAVIOR OF THREE-DIMENSIONAL NEEDLED CARBON FIBER REINFORCED SiC COMPOSITE UNDER LOAD-UNLOAD[J].Journal of The Chinese Ceramic Society,2009,37(1). |
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| Authors: | NIE Jingjiang XU Yongdong WAN Yuhui ZHANG Litong CHENG Laifei MA Junqiang |
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| Affiliation: | National Key Laboratory of Thermostructure Composite Materials;Northwestern Polytechnical University;Xi'an 710072;China |
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| Abstract: | The monotonic and load-unload tensile behaviors of three-dimensional(3D)needled T300 C/SiC composite were investi- gated.The results show that the tensile strength and strain of the 3D needled T300 C/SiC composite are 129.6MPa and 0.61%,re- spectively.The stress-strain curves of the 3D needled T300 C/SiC composite under monotonic and step tensile loads exhibit a nonlin- ear behavior,which is caused by the propagation of micro-cracks,debonding and sliding of interfaces,and gradually results in frac- turing a... |
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| Keywords: | three dimensional needled carbon/silicon carbide composite step loading tensile behavior |
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