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碳布叠层/碳复合材料动态压缩性能测试研究
  • 期刊名称：爆炸与冲击, 2007, 26(6):541-545.
  • 时间：0
  • 分类：O347.3[理学—固体力学;理学—力学]
  • 作者机构：[1]西北工业大学航空学院,陕西西安710072, [2]西北工业大学材料科学与工程学院,陕西西安710072
  • 相关基金：国家自然科学基金重大计划项目（90405016）
  • 相关项目：空天飞行器材料与结构的性能评价及关键理论研究
关键词： 固体力学, 动态压缩, SHPB, C/C复合材料, 应变率效应, solid mechanics, dynamic compression, SHPB, C/C composites, strain rate sensitivity
中文摘要：

利用带有波形整形器的Split Hopkinson Pressure Bar（SHPB）技术测试了碳布叠层/碳复合材料在应变率为500、1500 s^-1时的动态压缩性能。研究结果表明：利用轧制紫铜作为整形器材料不仅可以有效地实现对碳布叠层/碳复合材料的常应变率压缩加载,而且有助于改善试样两端的应力平衡,从而保证测试数据的可靠性;此外,与准静态压缩相比较,在动态压缩载荷下,碳布叠层/碳复合材料的压缩强度有较强的应变率效应,且复合材料压缩强度的动态增加函数可以用Cowper-Symonds幂函数的形式来表示。

英文摘要：

Dynamic compressive behaviors of carbon cloth /carbon composites were experimentally studied at the strain rates of 500, 1 500 s^-1 by the split Hopkinson pressure bar with pulse shaper. Experimental results show that the pulse shaping technique ensures nearly constant strain-rate deformation experienced by specimens under dynamically equilibrated stresses so that accurate stress-strain curves at two high rates can be obtained. Compared with quasi-static compression, the dynamic compressive strength of carbon cloth/carbon composite has strong stain-rate sensitivity and it increases with strain rate. A phenomenological strain-rate-dependent material model of Cowper-Symonds power function was proposed to describe the stress-strain response of composites. The calculated results by the proposed model agree well with the experimental data at high and low strain rates.

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空天飞行器材料与结构的性能评价及关键理论研究
期刊论文 135 会议论文 11
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