CAJ | 학술논문

研究镁合金板材轧制过程中的温度变化、边裂和轧制力,建立热-力-损伤耦合有限元模型.采用楔形试样研究压下量对温度、损伤和轧制力的影响.结果表明:随着压下量的增加,轧制力增大,镁板的温度降低:当压下量大于51.6%时,发生边裂,此时损伤值大于0.49;镁板轧制中的塑性-损伤是空洞发展、剪切变形和应变积累综合作用的结果.
연구미합금판재알제과정중적온도변화、변렬화알제력,건립열-력-손상우합유한원모형.채용설형시양연구압하량대온도、손상화알제력적영향.결과표명:수착압하량적증가,알제력증대,미판적온도강저:당압하량대우51.6%시,발생변렬,차시손상치대우0.49;미판알제중적소성-손상시공동발전、전절변형화응변적루종합작용적결과.
A thermal-mechanical-damage coupled finite elements model was established to investigate temperature changes, edge cracks and rolling force during rolling of magnesium alloy sheet. A cuneal sheet was also adopted to study the influence of reduction on temperature, damage and rolling force. The results show that with increasing the reduction, the rolling force increases, and the temperature of the Mg sheet decreases. Edge cracks occur when the reduction is above 51.6%, with the damage value of above 0.49. The plastic-damage in Mg sheet rolling is a result of hole development, shearing deformation and accumulative plastic strain.