CAJ | 학술논문

为建立能准确描述2198‐T3态铝锂合金充液拉深成形的本构模型并合理制定成形工艺参数，采用单向拉伸实验测定2198‐T3态铝锂合金0°、45°、90°方向的真实应力‐应变曲线，并通过不同本构方程拟合材料变形抗力曲线。结果表明，具有初始屈服应力的幂函数本构方程对板材不同方向的试验数据拟合较好；2198‐T3态铝锂合金板材塑性应变比 r为0.931，具有良好的拉深性能；采用DYNAFOM 有限元分析软件对充液拉深成形过程进行数值模拟，并对获得的成形性能参数进行验证。
위건립능준학묘술2198‐T3태려리합금충액랍심성형적본구모형병합리제정성형공예삼수，채용단향랍신실험측정2198‐T3태려리합금0°、45°、90°방향적진실응력‐응변곡선，병통과불동본구방정의합재료변형항력곡선。결과표명，구유초시굴복응력적멱함수본구방정대판재불동방향적시험수거의합교호；2198‐T3태려리합금판재소성응변비 r위0.931，구유량호적랍심성능；채용DYNAFOM 유한원분석연건대충액랍심성형과정진행수치모의，병대획득적성형성능삼수진행험증。
The true stress‐strain curves of 2198‐T3 aluminum‐lithium alloy in three different orientations (0° ,45° and 90°) were measured by uniaxial tensile test and fitted with different constitutive equations in order to establish an accurate constitutive model and obtain optimum forming parameters of the hydro‐mechanical deep drawing for the alloy .The results showed that the power law with initial yield stress was accurate for the different directions of the sheet .Meanwhile ,the plastic strain ratio r was 0.931 , indicating excellent drawing performance .Subsequently ,the hydro‐mechanical deep drawing simulation of this alloy was conduc‐ted by numerical simulation with DYNAFORM and the results were analyzed to verify the forming parameters .