CAJ | 학술논문

为了改进管件内高压成形工艺，用实验研究了某种304不锈钢薄壁金属管材料力学特性。研究了薄壁金属管的环向材料力学行为，搭建了环向拉伸试验装置，建立了环状试件测试段受力和夹具受力之间的关系，分析了摩擦和试件装夹位置的影响；用数字图像相关分析技术（DIC），测量了环向拉伸应变；利用各向同性材料验证了环向拉伸试验方法的可靠性。结果表明：试验管材环向应力应变曲线呈S形，试验管材轴向和环向材料力学行为有显著差异。
위료개진관건내고압성형공예，용실험연구료모충304불수강박벽금속관재료역학특성。연구료박벽금속관적배향재료역학행위，탑건료배향랍신시험장치，건립료배상시건측시단수력화협구수력지간적관계，분석료마찰화시건장협위치적영향；용수자도상상관분석기술（DIC），측량료배향랍신응변；이용각향동성재료험증료배향랍신시험방법적가고성。결과표명：시험관재배향응력응변곡선정S형，시험관재축향화배향재료역학행위유현저차이。
Thin-waled 304 steel tube material behavior was investigated experimentaly to improve the technique of tube hydro-forming. A ring hoop tension test (RHTT) system was built, and the simpliifed analytical model for the RHTT specimen was analyzed to evaluate the impact of friction and specimen position. The RHTT specimen strain was measured by using a digital image correlation (DIC) non-contact measurement system. The RHTT system and data processing method were veriifed using an isotropic material. The results show that an “S-shape” style is detected in the measured 304 tube hoop stress strain curve in large plastic deformation phase and there is signiifcant difference between the material behavior in tube axial direction and that in hoop direction.