从单轴拉升试验解析Abaqus有限元仿真数据的可靠性研究

Reliability Study of Abaqus Finite Element Simulation Data from Uniaxial Pull-up Tests

参考国家标准GB/T 1040.2-2022《塑料拉伸性能的测定第2部分:模塑和挤塑塑料的试验条件》制作实验片材并进行拉伸测试,将采集得到的引伸计位移和实验机荷载进行对数转换,得到Abaqus模拟所需的真实应力与真实应变参数.将材质属性于Abaqus有限元分析软件内进行建模,并施加一端约束,一端线性位移的边界条件.将模拟求得的应力与应变和实验中采集的应力与应变进行比对分析,得出Abaqus对于单轴拉伸实验具有较好的还原性,其模拟结果与真实数据较为接近,且应力集中和断裂点判断较为准确.

With reference to the national standard GB/T 1040.2-2022"Determination of Tensile Properties of Plastics Part 2:Experimental Conditions for Moulded and Extruded Plastics",experimental sheets were fabricated and subjected to tensile testing,and the collected induced displacement and experimental machine load were logarithmically converted to obtain the real stress and real strain parameters required for Abaqus simulation.The material properties were modelled in Abaqus finite element analysis software and boundary conditions of constraints at one end and linear displacements at the other were imposed.The simulated stresses and strains are compared with those collected in the experiment,and it is concluded that Abaqus has a good reproducibility for uniaxial tensile experiment,and the simulation results are closer to the real data,and the stress concentration and fracture point are judged more accurately.