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应用有限元分析软件研究熔接涂层及基体在弯曲载荷作用下的等效应力特性及其分布状态,对不同厚度涂层/基体系统进行三点弯曲仿真试验。通过将涂层分别置于受拉和受压一侧,分析弯曲试验中不同压头下压量时,涂层/基体系统的等效应力状态以及涂层厚度对接合面处应力的影响,得到不同厚度的涂层/基体系统在界面结合处的等效应力分布情况及变化规律。结果表明:弯曲载荷作用下,涂层/基体系统的等效应力最大值出现在涂层表面;压头下压量相同时,涂层越厚,涂层/基体系统的等效应力最大值越大;涂层与基体的界面结合处存在等效应力突变,涂层越厚,等效应力突变值越小,涂层与基体的等效应力过渡越平缓。
The finite element analysis software was used to study the equivalent stress characteristics and distribution of the welded coating and the substrate under the bending load. The three-point bending simulation of the coating / substrate system with different thickness was carried out. By placing the coatings on the tension and compression sides separately, the effect of the equivalent stress state of the coating / matrix system and the thickness of the coating on the stress at the joint is analyzed under different indenter pressures in the bending test, resulting in The Equivalent Stress Distribution and Variation of Coatings / Matrix Systems with Different Thicknesses at Interface Interface. The results show that under the bending load, the maximum value of equivalent stress of the coating / matrix system appears on the surface of the coating. When the pressure is the same, the thicker the coating, the greater the equivalent stress of the coating / matrix system The equivalent stress abrupt change occurs at the interface between the coating and the substrate. The thicker the coating, the smaller the equivalent stress abrupt change. The more the equivalent stress of the coating and the substrate transition smoothly.