CAJ | 학술논문

连续快速的冷冲压经一段时间后温度升高会影响到薄板的抗起皱性能，为研究温度变化对抗皱性能的具体影响，进行了不同温度下的单向拉伸试验和方板对角拉伸试验，并得到了薄板拉伸件在常温、75℃和150℃下的力学性能。单向拉伸试验结果表明，随着拉伸温度的升高，薄板的弹性模量、屈服强度和切线模量都有不同程度的减小。利用得到的不同温度下的材料参数对方板拉伸试验进行仿真，发现试验和仿真的拉力拉伸位移曲线吻合较好。对比仿真和试验结果发现，在研究的温度范围内薄板的抗起皱性能易受温度变化的影响，且随着温度升高先后经历了上升和下降的变化过程。
련속쾌속적랭충압경일단시간후온도승고회영향도박판적항기추성능，위연구온도변화대항추성능적구체영향，진행료불동온도하적단향랍신시험화방판대각랍신시험，병득도료박판랍신건재상온、75℃화150℃하적역학성능。단향랍신시험결과표명，수착랍신온도적승고，박판적탄성모량、굴복강도화절선모량도유불동정도적감소。이용득도적불동온도하적재료삼수대방판랍신시험진행방진，발현시험화방진적랍력랍신위이곡선문합교호。대비방진화시험결과발현，재연구적온도범위내박판적항기추성능역수온도변화적영향，차수착온도승고선후경력료상승화하강적변화과정。
Thin sheet will be heated after a period of time’s rapid continuous cold forming and its buckling-resistance will be influenced .In order to investigate the consequence of temperature variation on the sheet’s buckling-resistance ,uniaxial tensile experiments and YBT at different temperatures were performed .The properties of thin sheet at 23℃ ,75℃ and 150℃ were acquired respectively and it is found that the elasticity modulus ,yield stress and tangent modulus decrease w hen temperature ri-ses .The finite element simulations of YBT at different temperatures were done with the property’s parameters obtained ,and a good agreement between force-displacement curves of YBT and the simula-tions is found .The comparison of results of YBT and the finite element simulations indicates that thin sheet’s buckling-resistance is susceptible to the changes of temperature and it goes through the change processes of rise and fall when temperature rises from room temperature to 150℃ .