于DIC非接触变形测量技术的高温压缩变形实验

High Temperature Compression Deformation Experiment Based on DIC Non-Contact Deformation Measurement Technology

  • 摘要: 随复合材料的不断发展,其耐温性也逐渐升高,高温压缩变形测量实验与分析也成为实验重点与难点。目前高温压缩变形测量仍以应变片方式为主,当实验温度升高后,传统的接触式变形测量方式不再适用,为研究复合材料在高温环境下的压缩变形特性,非接触式变形测量方式逐渐成为主要手段。本文主要基于Digital Image Correlation(DIC)非接触测量技术探究CCF800碳纤维复合材料在150 ℃、180 ℃与250 ℃温度下的压缩变形特性,实验结果显示随着实验温度的升高,碳纤维复合材料抵抗压缩变形的能力减小,碳纤维复合材料的压缩模量、压缩强度与温度呈负相关,破坏应变与温度呈正相关。

     

    Abstract: The measurement and analysis of high temperature compression deformation has become the focus and difficulty with the development of composite materials. At present, the high temperature compression deformation measurement is still based on the strain gauge method. While the test temperature rises, the contact deformation measurement method is no longer applicable. In order to measure the high temperature compression deformation, the non-contact deformation measurement method has gradually become the useful method. This article mainly focuses on the compression deformation characteristics of CCF800 carbon fiber composites at 150 ℃, 180 ℃ and 250 ℃. The experiment results show that the compressive modulus and compressive strength of carbon fiber composite materials are negatively correlated with temperature, while the failure strain is positively correlated with temperature.

     

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