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为研究材料拉拔成型过程中的损伤问题,以1860 MPa级PC钢绞线为研究对象,运用损伤力学理论分析了钢丝拉拔成形过程,采用ABAQUS软件建立了钢丝拉拔成形过程的材料损伤有限元模型,并利用该有限元模型计算了拉拔形变过程中材料损伤的演化规律。计算结果表明,钢丝经单道次拉拔形变后,材料损伤值呈周期性分布,其损伤最大值始终出现在某几个节点上。随着形变量增加,钢丝损伤值也逐渐增加,从第1道次的0.0034逐渐增加到第8道次的0.0136,但增加的幅度逐渐减小。对于模具顶角为8°钢丝拉拔,单道次压缩率为16%~18%,损伤分布也较均匀,最大损伤值也较小。
In order to study the problem of damage during the material drawing process, 1860 MPa PC strand was taken as the research object. The drawing process of the steel wire was analyzed by using the damage mechanics theory. The material damage of the steel wire drawing process was established by ABAQUS software The finite element model was used to calculate the evolution of material damage in the process of drawing deformation. The calculation results show that the damage value of the steel is periodically distributed after single-pass drawing and deformation of the steel wire, and the maximum value of the damage always appears on some nodes. With the increase of deformation, the damage value of steel wire also gradually increases from 0.0034 in the first pass to 0.0136 in the eighth pass, but the increasing amplitude decreases gradually. For the mold apex angle of 8 ° wire drawing, single pass compression rate of 16% to 18%, the damage distribution is more uniform, the maximum damage value is smaller.