【摘要】 作者对冲击力作用下型砂的本构关系作了研究。结果表明，型砂动态本构关系与静态时有很大差别，冲击力作用下型砂的应变速率为５６／ｓ，平均速度为８．４ｍ／ｓ，加载时间约１０ｍｓ。更多还原

【Abstract】 he authors have studied the constitutive relations of molding sand under the effect of impact force.The result shows that there is great difference existed in the constitutive relations of moldingsand,while it is in the state of dynamic or static. The strain rate of molding sand under the effectof impact force is 56/s and the mean velocity of molding sand is 8.4m/s with a loading time of ap-proximate 10m/s.更多还原