Thermal fracture analysis of nonhomogeneous piezoelectric materials using an interaction energy integral method

详细信息    查看全文

• 作者：Fengnan Guo ; Licheng Guo ; Hongjun Yu ; Li Zhang
• 关键词：Nonhomogeneous piezoelectric materials ; Interface ; Interaction energy integral method ; Thermal stress intensity factors (TSIFs) ; Electric displacement intensity factor (EDIF)
• 刊名：International Journal of Solids and Structures
• 出版年：February, 2014
• 年：2014
• 卷：51
• 期：3-4
• 页码：910-921
• 全文大小：2921 K

文摘

This paper presents a modified interaction energy integral method to analyze the thermal stress intensity factors (TSIFs) and electric displacement intensity factor (EDIF) in nonhomogeneous piezoelectric materials under thermal loading. This modified method is demonstrated to be domain-independent, even when the nonhomogeneous piezoelectric materials contain interfaces with thermo-electro-mechanical properties. As a result, the method is shown to be convenient for determining the TSIFs and EDIF in nonhomogeneous piezoelectric materials with interfaces. Several examples are shown, and they successfully verify the domain-independence of the present interaction energy integral. The study results also show that the mismatch of material properties can significantly influence the TSIFs and EDIF, particularly when the crack tip is close to the interface. Crack angles and temperature boundary conditions are also shown to significantly influence the TSIFs and EDIF.