液压式材料试验机测力指针运行停滞现象分析

Analysis on Operational Stagnation Phenomenon of Force Pointer in Hydraulic Material Testing Machine

对低碳钢材料拉伸试验过程中,WE-60型液压式万能试验机的测力指针在未达到屈服阶段(即在弹性阶段)发生短暂停滞现象进行剖析,说明被拉伸试件的最初反抗变形力是试验机测力指针运行停滞现象的原因,且静摩擦力的最大临界值是测力指针在弹性阶段发生短暂停滞现象的主要因素。

Before the low carbon steel reaches the yield phase in the process of tensile test on WE-60 type hydraulic universal material testing machine, the force pointer of the testing machine will stagnate transiently. The transient stagnation of the force pointer in the elastic stage is analyzed, and the results show that the reason of the transient stagnation is the initial anti-deformation force of tensile material. The maximal critical value of friction force is the main factor of the transient stagnation of force pointer in the elastic stage.