低碳钢点焊结构的力学参数分析

Mechanic parameters analysis of spot welded low carbon steel structure

以低碳钢为母材的点焊结构为研究对象,分别使用调试引伸计、拉伸试验和ANSYS的数值仿真三种方法,研究点焊结构的变形和应力状态,得出角度变形与载荷之间的关系,仿真分析点焊结构分焊核、塑性环和母材三部分的力学模型的合理性.采用点焊结构力学模型分析仿真结果.结果表明,得出角度变形量随载荷之间的关系,过程中调整塑性环的屈服极限和塑形模量的数值,使得仿真的角度变形量和试验结果相一致.有限元仿真的塑性环的屈服极限和塑形模量是可测的,可以为以后相关的研究提供参考.

The stress-strain state of spot welded low carbon steel structure was studied by three methods including extensometer measurement, tensile test and numerical simulation based on ANSYS software. The relationship between angle distortion and load was obtained. The results proved the reliability of simulated mechanics model of spot welding structure including weld and plastic ring and base metal. The relationship between angle distortion and load was achieved by analyzing simulation results of the spot welding structure mechanical model. The yield limit and plastic modulus were adjusted during simulation to make the simulation result of deformation consistent with that of the test result. The test results indicated that the yield limit and plastic modulus of plastic ring were measurable by finite element simulation method which could provide references for relative research.