液晶显示器缓冲垫绿色设计及有限元分析

目的设计绿色环保的液晶显示器缓冲衬垫,并对其受跌落冲击时的缓冲效果进行有限元分析。方法采用瓦楞纸板折叠成形的方式对液晶显示器的缓冲衬垫进行绿色设计。在ABAQUS有限元软件中建立液晶显示器和缓冲衬垫的实体模型,通过有限元软件模拟液晶显示器运输过程中角跌落的冲击响应,分析缓冲衬垫的缓冲效果。结果角跌落冲击过程中,等效应力云图表明衬垫跌落角处变形较大,应力集中,显示器跌落角处最大应力达到1.293 MPa,但未超过材料的屈服极限。冲击加速度计算结果表明,以1 m的高度跌落时,显示器上易损件的最大冲击加速度为748 m/s2,未超过液晶显示器的许用脆值。结论瓦楞纸板折叠成形的环保缓冲衬垫满足缓冲包装要求,能有效保护显示器抵抗跌落冲击。

Green Design and Finite Element Analysis of LCD Buffering Cushion

The work aims to design environmentally friendly LCD buffering cushion and study the buffering effect during the drop impact based on the finite element analysis. Green LCD buffering cushion was designed by folding corrugated board. The physical models for LCD and buffering cushion were established in the finite element software of ABAQUS. The corner drop impact response in the course of transportation of LCD was simulated by the finite element software to analyze the buffering effects of buffering cushion. In the course of corner drop impact, the equivalent stress nephogram showed that deformation was serious at the drop corner of cushion where the stress concentrated and the maximum stress reached up to 1.293 MPa. However, the maximum stress did not exceed the yield limit of corrugated board. From impact acceleration curve, it showed that the maximum impact acceleration of quick-wear parts was 748 m/s2 at the dropping height of 1 m, which did not exceed the permissible fragility of LCD. The environmentally friendly buffering cushion folded by corrugated board can meet the requirements of cushion packaging, which protects LCD from drop impact effectively.