| 引用本文: | 于坤,张长瑞,曹英斌,等.C/SiC复合材料残余应力的电火花小孔法测定研究.[J].国防科技大学学报,2009,31(2):31-35.[点击复制] |
| YU Kun,ZHANG Changrui,CAO Yingbin,et al.A Study of Residual Stresses on Short Carbon Fiber Enhanced Silicon Carbide Composites[J].Journal of National University of Defense Technology,2009,31(2):31-35[点击复制] |
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| C/SiC复合材料残余应力的电火花小孔法测定研究 |
| 于坤, 张长瑞, 曹英斌, 刘荣军 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 进行了C/SiC复合材料残余应力的小孔法表征。基于现有小孔法的不足以及材料的较好电导率，提出了电火花打孔法的残余应力测量方法，建立了相应的残余应力测量流程。进行了不同平整表面样品的残余应力测量。结果表明电火花打孔法具有较好的区分性，也表明C/SiC复合材料具有较小的本征残余应力和机加工应力，这说明：C/SiC复合材料作为反射镜材料具有很好的面形稳定性的优势。 |
| 关键词: 电火花方法 残余应力测量 小孔法 C/SiC复合材料 |
| DOI： |
| 投稿日期：2008-12-23 |
| 基金项目:国家部委基金资助项目 |
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| A Study of Residual Stresses on Short Carbon Fiber Enhanced Silicon Carbide Composites |
| YU Kun, ZHANG Changrui, CAO Yingbin, LIU Rongjun |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Feasibility of hole-drilling method for the measurement of residual stresses in short carbon fiber enhanced silicon carbide (C/SiC) composites was studied. Based on the disadvantage of conventional hole-drilling method and good electric conductance of high-hardness C/SiC composite, electric sparkle method (ESM), an alternative method, was presented and proved suitable. Then an experimental procedures for residual stresses of C/SiC composites were established. Finally the established ESM method was used for the measurement of residual stresses in two C/SiC samples with different machined surface. Results show that difference of residual stresses between two samples displays good distinguishing ability of the ESM method. Less intrinsic residual stresses and mechanically introduced residual stresses bring the advantage of surface figure stability for C/SiC composites used for reflecting mirror. |
| Keywords: electric sparkle method measurement of residual stresses hole-drilling method C/SiC composites |
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