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本文借助SEM高温疲劳伺服实验系统,实时的观察了单向压缩下一种新型玻璃纤维增强复合材料(GFRP)的细观损伤演化,获得了纤维复合材料强度、弹性模量、刚度和损伤演化与主纤维方位角之间的关系。通过3组21个实验结果的分析,发现纤维复合材料的极限强度和弹性模量随主纤维方位角的增大先减小后增大,当主纤维方位角在45°-60°之间时,其强度和模量最小。同时进一步揭示了主纤维方位角对纤维复合材料破坏模式控制作用。
In this paper, the microscopic damage evolution of a new type of glass fiber reinforced plastic (GFRP) under unidirectional compression was observed in real time with SEM high temperature fatigue servo system. The strength, elastic modulus, stiffness and damage evolution of the fiber composite The relationship between the main fiber azimuth. Through the analysis of 21 experimental results in three groups, it is found that the ultimate strength and elastic modulus of the fiber composites decrease first and then increase with the increase of the azimuth of the main fiber. When the azimuth angle of the main fiber is between 45 ° and 60 °, Its strength and modulus minimum. At the same time, it further reveals the control effect of the main fiber azimuth on the failure modes of the fiber composites.