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應(yīng)變率和相對(duì)密度對(duì)泡沫SiCp/ZL104壓縮性能的影響
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Effects of Strain Rate and Relative Density on Compressive Properties of SiCp/ZL104 Composite Foams
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    摘要:

    對(duì)采用熔體發(fā)泡法制備的泡沫5%（體積分?jǐn)?shù)，下同）SiCp/ZL104復(fù)合材料進(jìn)行了準(zhǔn)靜態(tài)和動(dòng)態(tài)壓縮性能的測(cè)試和分析。結(jié)果表明：無(wú)論是動(dòng)態(tài)下壓縮還是準(zhǔn)靜態(tài)下壓縮，泡沫5%SiCp/ZL104復(fù)合材料的應(yīng)力-應(yīng)變曲線都呈現(xiàn)出典型的3個(gè)階段：線彈性段、平臺(tái)段和致密段；屈服應(yīng)力對(duì)應(yīng)變率很敏感，使得應(yīng)變率增加時(shí)，屈服應(yīng)力增加，且有應(yīng)變硬化現(xiàn)象發(fā)生；隨著相對(duì)密度的增大，泡沫5%SiCp/ZL104復(fù)合材料的動(dòng)態(tài)屈服應(yīng)力和流動(dòng)應(yīng)力與準(zhǔn)靜態(tài)載荷相比顯著增加。

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    The quasi-static and dynamic compressive properties of 5vol%SiCp/ZL104 composite foams, fabricated by the method of direct melt foaming, were tested and analyzed. The results show that under the conditions of quasi-static or dynamic compression, the stress-strain curves of 5vol%SiCp/ZL104 composite foams involves three regions: the linear elastic deformation region, the collapse plateau region and the densification region. The yield stress is sensitive to the strain rate, so it increases and the strain hardening occurs with the increase of the strain rate. Compared with that under quasi-static loading, dynamic yield stress and flow stress of 5vol%SiCp/ZL104 composite foams increase remarkably with the increase of relative density.

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羅彥茹,于思榮,朱先勇,張英波.應(yīng)變率和相對(duì)密度對(duì)泡沫SiCp/ZL104壓縮性能的影響[J].稀有金屬材料與工程,2009,38(10):1807~1810.[Luo Yanru, Yu Sirong, Zhu Xianyong, Zhang Yingbo. Effects of Strain Rate and Relative Density on Compressive Properties of SiCp/ZL104 Composite Foams[J]. Rare Metal Materials and Engineering,2009,38(10):1807~1810.]
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  • 收稿日期:2008-12-08
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