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首页> 外文期刊>Key Engineering Materials >APPLICATION OF STRESS ANALYSIS BY DIGITAL IMAGE CORRELATION AND INTELLIGENT HYBRID METHOD TO UNIDIRECTIONAL CFRP LAMINATE
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APPLICATION OF STRESS ANALYSIS BY DIGITAL IMAGE CORRELATION AND INTELLIGENT HYBRID METHOD TO UNIDIRECTIONAL CFRP LAMINATE

机译：数字图像相关和智能混合法应力分析在单向CFRP层合中的应用

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摘要

Fiber reinforced composites are heterogeneous and anisotropic. The applicability of the stress analysis methods on such heterogeneous and anisotropic materials is not well known. In the present study, an attempt is made to apply the digital image correlation method and the intelligent hybrid method to a carbon fiber reinforced plastic (CFRP) laminate. A material used is carbon/epoxy system. Laminate configuration is unidirectional. Tensile load is applied in off-axis (45 degrees) direction as well as longitudinal (0 degree) and transverse (90 degrees) directions on a CFRP laminate. Displacement, strain and stress fields due to the tensile loading in the CFRP unidirectional laminate are analyzed. The constitutive equation considering material anisotropy is built into the intelligent hybrid method used at the time of analyses. The validity of the algorithm is checked through comparison between results of the present method, experimental results from strain gauge method, and the analytical results from finite element method (FEM).
机译：纤维增强复合材料是非均质和各向异性的。应力分析方法在此类异质材料和各向异性材料上的适用性尚不清楚。在本研究中，尝试将数字图像相关方法和智能混合方法应用于碳纤维增强塑料（CFRP）层压板。所使用的材料是碳/环氧树脂系统。层压配置是单向的。在CFRP层压板上沿轴向（45度）以及纵向（0度）和横向（90度）方向施加拉伸载荷。分析了CFRP单向层压板中由于拉伸载荷引起的位移，应变和应力场。考虑材料各向异性的本构方程内置于分析时使用的智能混合方法中。通过比较本方法的结果，应变仪方法的实验结果和有限元方法（FEM）的分析结果，验证了算法的有效性。

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