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许杨健,刘文芝.位移边界对2D-FGM板热应力影响研究[J].河北工程大学自然版,2015,32(2):31-35
位移边界对2D-FGM板热应力影响研究
Study of displacement boundary stress effects on the transient thermal stress of 2D-FGM plate
投稿时间:2014-12-24  
DOI:10.3969/j.issn.1673-9469.2015.02.008
中文关键词:  功能梯度材料板  冷却  瞬态热应力  位移边界  有限元法
英文关键词:functionally gradient material(FGM)plate  cooling  Transient thermal stress  the displacement boundary condition  finite element method
基金项目:
作者单位
许杨健 河北工程大学 土木工程学院, 河北 邯郸 056038 
刘文芝 河北工程大学 土木工程学院, 河北 邯郸 056038 
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中文摘要:
      考虑不同的位移边界条件,建立了常物性2D-FGM板研究模型,并采用有限元法,得到其冷却瞬态热应力场分布图形。位移边界条件对常物性2D-FGM平面区域冷却瞬态热应力分布影响颇大,在简支和一端固定情况下,2D-FGM板自由边界上的热应力σx=0;两端固定情况下,其左右两边界均形成上中下三个应力聚集,应力分布形状和数值都发生了巨大的变化;将四周均设置呈固定约束后,热应力数值增长幅度较两端固定情况时更为明显。此结果为该材料的设计、制备提供了准确的理论计算依据。
英文摘要:
      Considering the different displacement boundary condition, the model of 2D-FGM plate with temperature independency of material properties was established, and the cooling transient thermal stress field distribution pictures were obtained with the finite element method. Effects on the transient thermal tress of 2D-FGM plate with temperature independency of material properties of during cooling process that the displacement boundary condition made were influential enormously. The thermal stress σx of on the free boundary of the 2D-FGM plate under simple supported and under one end clamped is zero; The thermal stresses accumulation were formed on the middle and lower of the two left and right boundaries of the 2D-FGM plate under two ends clamped, at the same time the shape and values of the thermal stress changed tremendously; To the 2D-FGM plate under clamped all around, the growth rate of the thermal stresses was more obvious than that of the 2D-FGM plate under two ends clamped. The results of this paper provide the foundations of theory calculation for the design and fabrication of the material.
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