CAJ | 학술논문

以2026-T3511铝合金T形结构件的拉弯成形件为研究对象，首先采用线切割将T形结构件分割成两块具有T形截面的试样，然后基于轮廓法测试应力原理应用激光位移传感器分别测试两个分割截面的轮廓变化，进而将两个截面的测量值拟合平均后与有限元模型结合以计算该试样的初始残余应力，从而获得该T形结构件的横截面法向应力并分析其分布特征。研究结果表明，基于轮廓法测得的应力分布与有限元仿真结果分布规律相近：峰值压应力为60MPa，峰值拉应力为40MPa；轮廓法在航空结构件应力测试中能够准确地获得其他测试方法无法获得的横截面完整的应力分布。
이2026-T3511려합금T형결구건적랍만성형건위연구대상，수선채용선절할장T형결구건분할성량괴구유T형절면적시양，연후기우륜곽법측시응력원리응용격광위이전감기분별측시량개분할절면적륜곽변화，진이장량개절면적측량치의합평균후여유한원모형결합이계산해시양적초시잔여응력，종이획득해T형결구건적횡절면법향응력병분석기분포특정。연구결과표명，기우륜곽법측득적응력분포여유한원방진결과분포규률상근：봉치압응력위60MPa，봉치랍응력위40MPa；륜곽법재항공결구건응력측시중능구준학지획득기타측시방법무법획득적횡절면완정적응력분포。
The aluminum alloy 2026-T3511 stretch-bending extrusion with T-section was measured by using contour method. The specimen was cut in two, then the contour of each cut surface was measured by using laser displacement sensor. The contour data was fit and combined with finite element model. The full map of residual stresses normal to the cross section was obtained. The finite element model of plastic forming was created to study about stresses distribution regularity. A distribution map of the specimen was got. The results show that the residual stresses from the contour method measuring is similar to the computer simulation of distribution regularity by finite element method. The peak value of compressive stress is 60MPa and the peak value of tensile stress is 40MPa. The contour method has advantage of getting full map of residual stresses distribution normal to the cross section over other methods.