板式家具结构强度分析

50年代后期,Kotas对五面箱体的结构强度进行了研究,并且写了一本家具设计手册。Eckelman从板式部件的接合强度及家具的整体结构强度做了许多研究,他提出了板件的刚度与各种形式角接合变形的关系。他和Rabiej对带有横搁板和中隔板的柜体作了综合分析,得出计算公式,可用其计算三角固定一角自由条件下的柜体在受力时的变形。国内主要在家具力学性能测试方面,标准制定方面做了一些研究,在结构强度分析方面尚未进行过研究。

AN ANALYSIS OF THE STRENGTH CASE FURNITURE

In this paper, the finite element method (FEM) is used to analyse the strengfh of case furniture. The case body is made of particleboard and the back is made of plywood or fiberboard. These boards belong to viscoelastic behaviour materials, but they can be considered as linear elastic behaviour materials within a certain area and dispersed and analysed by elastic plate elements. The corner joint of case furniture is a key problem during the calculation by FEM the small elements which located near corner joints are assumed to be semi-rigid elements. Then the fabricated modulus of elasticity of the semi-rigid elements are determined by individual corner joint experiments. In this experiment, four kinds of particleboard and two kinds of corner jiont forms were ussd to make up eleven cases. The displacement of some typical points under each load was measured by the Fturniture strength Test Mechine. After comparing the displacements of measurements with that of calculations, it was found that the errors were usually below 30%. Results of this study indicated that the deflection of case furniture could be calculated by using FEM, and proved that the program could be used for predicting case furniture deflection reliably.