Axisymmetric yielding of functionally graded spherical vessel under thermo-mechanical loading

作者：Sadeghian Mojtaba^*; Toussi Hamid Ekhteraei

来源：Computational Materials Science, 2011, 50(3): 975-981.

DOI：10.1016/j.commatsci.2010.10.036

• Functionally Graded Material
• Thermal stress analysis
• Elastic perfectly plastic material
• Elastic-plastic analysis
• Yielded region borderline

Primarily the separate distributions of elastic and perfectly plastic thermal stress in spherical pressure vessels made up of Functionally Graded Material (FGM) are represented. Next, the combined elastic and perfectly plastic thermal stress analysis of a spherical pressure vessel is considered. It is assumed that no unloading is occurred and the modulus of elasticity, yielding stress and some specific material characteristic parameters are power functions of radius. In a spherical FGM vessel and for different material compositions, the effect of pressure and temperature upon the growth of plastic zone is studied. Especially the change in the position of the borderline between the elastic and plastic regions is sought. In an extensive range of material thermo-mechanical properties, the position of the elastic-plastic interface line and the yield pattern, which shows the number of plasticized layers in the wall of the vessel, are indicated.

• 出版日期2011-1