基于ANSYS LS-DYNA的塑料模具冲蚀过程分析

Analysis of Erosion Process of Plastic Mold Based on ANSYS LS-DYNA

利用有限元仿真模拟技术,基于显式动力学方法,应用ANSYS LS-DYNA软件,研究了塑料填料颗粒在不同条件下冲击模具材料的过程。模拟了球形石英砂颗粒冲击45号模具钢的过程,给出了颗粒冲击靶材之后的冲蚀坑形貌。研究了单颗粒及多颗粒冲蚀过程中,系统内能量的变化规律以及模具材料表面应力的变化特点。从颗粒性质及环境因素两方面作为切入点,研究颗粒直径、冲击速度、冲击角度及环境温度等对模具材料冲蚀磨损的影响,分析模具材料的冲蚀率随各因素的变化规律。结果表明:靶材冲蚀率随冲击速度的增加而增大;随颗粒直径、环境温度的增加而缓慢增加;当冲击角度为30°时,靶材的冲蚀率最大。

In this paper,based on the explicit dynamic method and the finite element simulation technology,ANSYS LSDYNA software was used to study the impact process of plastic filler particles on mold materials under different conditions,and simulate the process of spherical quartz sand particles impacting No.45 mold steel.Through the model simulation,the erosion pit morphology after the particles hit the target materials was given,and the law of energy change in the system during single-particle and multi-particle erosion and the change characteristics of the surface stress of the mold material were studied.From the aspects of particle properties and environmental factors as entry points,the influence of particle diameter,impact speed,impact angle and environmental temperature on the erosion wear of mold materials were studied,and the change law of the erosion rate of mold materials with various factors was analyzed.The results show that the erosion rate of the target materials increases with the increase of impact speed;it slowly increases with the increase of particle diameter and environment temperature;when the erosion angle is 30°,the erosion rate is the maximum.