Development and Validation of Multiscale Thermo-Elasto-Viscoplastic Analysis Method for Plain-Woven Composites
Development and Validation of Multiscale Thermo-Elasto-Viscoplastic Analysis Method for Plain-Woven Composites
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DOI：
10.4028/www.scientific.net/kem.794.78
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发表时间：
2019-02
期刊：
影响因子：
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通讯作者：
Gai Kubo;T. Matsuda;H. Nagaoka;Yoshihiko Sato
中科院分区：
文献类型：
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作者：
Gai Kubo;T. Matsuda;H. Nagaoka;Yoshihiko Sato
本研究发展了平织复合材料热力性能的分析方法，并将其应用于平织玻璃钢复合材料的热弹粘塑性分析。为此，在本课题组发展的平面编织复合材料的细观/细观/宏观尺度的热弹性均匀化方法中，引入了一个含时的基体材料温度本构方程。这种方法使我们不仅可以分析纤维束中的热弹粘塑性性质，还可以分析纤维束中的纤维和基质材料，以及宏观的热性质。然后将该方法应用于平纹编织玻璃钢复合材料在冷却到25℃之前的宏观温度从25°C到80°C变化的热膨胀分析，并将分析结果与实验数据进行比较，验证了该方法的有效性。结果还表明，该方法能较好地评价复合材料中的残余应力和应变。
In this study, the analysis method for thermomechanical properties of plain-woven composites is developed, and applied to thermoelastoviscoplastic analysis of plain-woven glass fiber-reinforced plastic (GFRP) composites. For this, a time-dependent constitutive equation depending on temperature for matrix materials is incorporated into the micro/meso/macro-scale thermo-elastic homogenization method for plain-woven composites developed by our research group. This method enables us to analyze thermoelastoviscoplastic properties in not only fiber bundles but also fibers and matrix materials in fiber bundles, as well as macroscopic thermal properties. This method is then applied to the thermal expansion analysis of a plain-woven GFRP composite subjected to a macroscopic temperature change from 25°C to 80°C before it is cooled to 25°C. Comparing the analysis results with experimental data, we validate the present method. It is also shown that the present method can evaluate themal residual stress and strain in the composite.