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为了掌握差厚板的力学性能,在不同厚度钢板的0°,45°和90°方向取样进行拉伸试验,并对试验参数与板厚的关系曲线进行分析,绘制了应力、应变与厚度的三维曲面,并建立了相应的数学模型。利用上述试验数据,在ABAQUS有限元软件中建立差厚板的单向拉伸模型,根据有限元模拟的差厚板单向拉伸过程进行实际拉伸试验。结果表明,差厚板不同区域的力学性能差异较大;通过在应力、应变与厚度的三维曲面上插值,即可得到差厚板0°,45°和90°方向上任意厚度的力学性能参数;差厚板单向拉伸试验与模拟的缩颈位置均在试样薄区,试验与模拟的力-位移曲线吻合良好。
In order to grasp the mechanical properties of the poor thick plate, the tensile tests were taken at 0 °, 45 ° and 90 ° directions with different thickness of the steel plate. The relationship between the test parameters and the plate thickness was analyzed, and the stress, strain and thickness Three-dimensional surface, and the establishment of the corresponding mathematical model. Based on the above experimental data, the uniaxial tensile model of the thick slab was established in the ABAQUS finite element software and the actual tensile test was carried out according to the uniaxial tensile process of the thick slab by FEM. The results show that the mechanical properties of the different regions of the difference plate are quite different. By interpolation on the three-dimensional surface of stress, strain and thickness, the mechanical properties at arbitrary thickness of 0 °, 45 ° and 90 ° are obtained The difference between the uniaxial tensile test and the simulated necking position of the difference plate is in the thin region of the specimen, and the force-displacement curves of the test and the simulation are in good agreement.