CAJ | 학술논문

目的：提出5 A06-O铝镁合金板材在不同温度及应变率条件下的统一本构方程。方法采用CCS-88000电子万能试验机对5 A06-O铝镁合金板材进行不同变形温度和应变速率条件下的单向拉伸试验。结果随着温度的升高，流变应力明显下降，同时，应变会显著增加；在常温时，应变速率对流变应力的影响不明显，但当温度高于150℃时，流变应力均随着应变速率的增加而升高。结论提出了在温热条件下描述材料复杂流变曲线本构方程的建模方法-增函数相减法，通过该方法建立的本构方程形式简单，能够反映温度和应变率的影响，实现对复杂流变曲线较为准确的描述。
목적：제출5 A06-O려미합금판재재불동온도급응변솔조건하적통일본구방정。방법채용CCS-88000전자만능시험궤대5 A06-O려미합금판재진행불동변형온도화응변속솔조건하적단향랍신시험。결과수착온도적승고，류변응력명현하강，동시，응변회현저증가；재상온시，응변속솔대류변응력적영향불명현，단당온도고우150℃시，류변응력균수착응변속솔적증가이승고。결론제출료재온열조건하묘술재료복잡류변곡선본구방정적건모방법-증함수상감법，통과해방법건립적본구방정형식간단，능구반영온도화응변솔적영향，실현대복잡류변곡선교위준학적묘술。
To propose a unified constitutive equation of 5A06-O aluminum magnesium alloy sheet under the condition of different temperature and strain rate.Uniaxial tensile test of 5A06-O aluminum magnesium alloy sheet under the condi-tion of different temperature and strain rate was conducted on a CCS-88000 electronic universal testing machine.With the increase of temperature, the flow stress decreased obviously and the maximum strain increased significantly.At room tem-perature, the influence of strain rate on flow stress was not obvious.When the temperature was higher than 150 ℃, the flow stress was elevated with the increase of strain rate.A modeling method called increasing functions subtracted by each other was proposed to describe the complex flow stress-strain curve in warm/hot condition.The constitutive equation estab-lished by this method had a simple form, could reflect the influence of temperature and strain rate and describe the complex flow stress-strain curve more accurately.