【作者】 朱兆祥； 胡时胜； 陆菁； 骆利民； 王礼立；

【Author】 Zhu Zhaoxiang,Hu Shisheng,Lu Qing,Lu Liming,Wang Lili (University of Science and Technology of China )

【机构】 中国科技大学；

【摘要】 本文给出了钢、铅和钢-铅层合体在高应变率下力学性能的实验结果,并提出了一种方法。根据这一方法,钢-铅层合体的本构关系可利用钢和铅的本构关系推导出,该方法的正确性已为文中给出的实验结果证实。更多还原

【Abstract】 The steel-lead vesseels are extensively used in nuclear power industry.To avoid any catastrophe.it is of importance to know the mechanical behaviour of steel-lead laminate under various conditions.including impulsive loading.Furthermore.it is interesting to know whether the stress-strain relation of steel-lead laminate can be deduced directly from the stress-strain relations of steel and lead,respectively. In this paper.the experimental results for steel.lead and steel-lead laminate are presented. The high strain rate.tests were preformed on a computerized Split Hopkinson Pressure Bar SHPB.According to the experimental results.thevisen-plastic behavior of steel and lead may he described by a logrithmic law and a Slater’s equation.respectively. Because of the fact that the yield strain of lead is less than that of steel.the deformation of steel-lead laminated specimen in the axial compression should include four stages.The first three.deformation stages are much shorter so that the last deformation stage is mainly taken into consideration.Its stress-strain relation isσ=(σ+ασ) /(1 +α) whereσ σ andσare axial stresses of lead.steel and steel-lead laminate respectively.and is the ratio of cross section area of steel in that of lead.The calculated results are in good agreement with the experimental results.Then it can be seen that according to the model suggested in present paper.the axial visco-plastic stress-strain relation of steel-lead lammate can he deduced from the corresponding stress-strain relations of steel and lead.更多还原