【摘要】 基于有限元分析软件ABAQUS建立了Si Cp/2009Al复合材料的淬火残余应力场模型，并通过轮廓法测试Si Cp/2009Al复合材料的实际残余应力来验证淬火模型的准确性。结果表明，Si Cp/2009Al复合材料试块淬火残余应力呈外压内拉特征，20℃淬火试块的残余应力模拟值和轮廓法测试结果基本吻合，证明了仿真分析的准确性。淬火温度由20℃提高至50℃后，最大残余拉应力由214.6 MPa消减至103.5 MPa。后续的冷热循环工艺也可以有效消减残余应力。20℃淬火试块经两次冷热循环后最大拉应力降至126.6 MPa,50℃淬火试块经两次冷热循环后最大拉应力降至72.1 MPa。更多还原

【Abstract】 Based on finite element analysis software ABAQUS,a quenching residual stress field model of Si C_p/2009 Al composites was established,and the accuracy of the quenching model was verified by testing the actual residual stress of the Si C_p/2009 Al composites using contour method. The results indicate that the quenching residual stress of the Si C_p/2009 Al composite specimens exhibits a characteristic pattern of compressive stress at the surface and tensile stress in the interior. The simulated residual stress values of the specimens quenched at 20 ℃ are basically consistent with the contour method test results,proving the accuracy of the simulation analysis. As the quenching temperature increases from 20 ℃ to 50 ℃,the maximum residual tensile stress decreases from 214. 6 MPa to 103. 5 MPa. Furthermore,subsequent thermal-cooling cycling treatment can also effectively reduce residual stress. After two cycles,the maximum tensile stress is reduced to 126. 6 MPa for the specimens quenched at 20 ℃ and to 72. 1 MPa for those quenched at 50 ℃.更多还原