不完美FGM板在湿热机械载荷下的弯曲分析及分析验证

IF 1.9 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
T. H. Daouadji, B. Adim, Rabia Benferhat
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引用次数: 26

摘要

本文研究了完全和不完全梯度功能材料板在湿热机械载荷作用下的弯曲分析。由于FGM制造过程中的技术问题,FGM样品内部可能会产生孔隙和微孔,从而导致材料密度和强度的降低。在本研究中,假定FGM板在板截面上具有均匀和不均匀的孔隙率分布。采用改进的混合规则来近似FGM板的材料性能,包括孔隙率和体积分数。因此,假设板的弹性系数、热膨胀系数和湿胀系数沿厚度方向呈梯度分布。弹性基础采用双参数帕斯捷尔纳克基础建模。给出了平衡方程,并求解了若干实例,说明了金属陶瓷板在弹性基础上受湿热力学作用时的弯曲响应。研究了许多参数的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bending analysis of an imperfect FGM plates under hygro-thermo-mechanical loading with analytical validation
Flexural bending analysis of perfect and imperfect functionally graded materials plates under hygro-thermo-mechanical loading are investigated in this present paper. Due to technical problems during FGM fabrication, porosities and micro-voids can be created inside FGM samples which may lead to the reduction in density and strength of materials. In this investigation, the FGM plates are assumed to have even and uneven distributions of porosities over the plate cross-section. The modified rule of mixture is used to approximate material properties of the FGM plates including the porosity volume fraction. In order the elastic coefficients, thermal coefficient and moisture expansion coefficient of the plate are assumed to be graded in the thickness direction. The elastic foundation is modeled as two-parameter Pasternak foundation. The equilibrium equations are given and a number of examples are solved to illustrate bending response of Metal-Ceramic plates subjected to hygro-thermo-mechanical effects and resting on elastic foundations. The influences played by many parameters are investigated.
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来源期刊
Advances in Materials Research-An International Journal
Advances in Materials Research-An International Journal MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.50
自引率
27.30%
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0
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