Fracture Analysis of Magneto-Electro-Elastic Materials with an Arbitrarily Oriented Crack

• Main Authors: Yu-Ru Jan, 詹育儒
• Other Authors: Ching-Hwei Chue
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/35260357322783244808

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 94 === In this studying, the fracture problem of an arbitrarily oriented crack in a magnetoelectroelastic solid has been analyzed by using the energy density theory. The solution for the energy density factor S is modified to include the stress intensity factors, the electric displacement intensity factor(or the electrical field intensity factor) and the magnetic induction intensity factor(or the magnetic field intensity factor). The driving force and crack growth are also found to be significantly influenced by the polarization direction. Change in the directions of the applied magnetic and electric fields may influence the character of crack growth which could be enhanced or retarded. The ratios R and V are used as the parameters to judge the significance of mechanical load, electric field or magnetic field.