瑞玛试验机拉拉试验夹具设计及有限元分析

为能在瑞玛高频疲劳试验机上实现做"T"型焊接试样拉伸试验的目的,创新设计了可根据试样厚度调节夹具装夹板长度的拉拉试验夹具。首先,根据瑞玛试验机的空间布置及试样尺寸范围确定夹具中夹头、销、夹具底座及装夹板的整体尺寸,其次,运用经典力学理论对夹具的各个具体尺寸进行设计,最后,运用Workbench软件的静态强度有限元分析对夹具进行校核设计,并将仿真计算结果与经典力学理论计算结果进行误差比较分析,验证了设计夹具的可行性,最终得到了一种用于"T"型焊接试样的装夹板长度可调节的新型夹具。

Design and Finite Element Analysis of Pulling Test Fixture of RUMUL Test Machine

In order to achieve the purpose of"T"type welding specimen tensile test on the RUMUL high frequency fatigue testing machine,we innovatively designed a pull test fixture that adjusts the length of the clamp plate according to the thickness of the specimen.Firstly,according to the spatial arrangement of the RUMUL test machine and the size range of the sample,the overall dimensions of the chuck,pin,clamp base and clamping plate in the fixture are determined.Secondly,the specific dimensions of the fixture are designed by classical mechanics theory;Finally,the static strength finite element analysis of the workbench software is used to check the fixture design,and the simulation results are compared with the classical mechanical theory calculation results to verify the feasibility of the design fixture.A new type of clamp with adjustable length of the clamping plate for the"T"welding specimen was finally obtained.