Crack fracture of elastic brittle beams

• Main Authors: Chen, Yi-Chou, 陳藝洲
• Other Authors: Yaw-Dong Shih
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/18117037900910890613

碩士 === 大同大學 === 機械工程研究所 === 91 === The study of fracture has shown the importance of three features. To begin with equation, in experimental aspects, we can do my selves to complete the long pieces of cement sticks and the cement disk as experimental specimen. Furthermore, we can take two-dimensional Hook’s law into the equation of equilibrium of motion, after fracture, to calculate the equation of motion of u(x, y, t) taken two kinds of boundary condition and initial condition to obtain the results of the fracture situation of u(x, y, t). Next we can utilize the result of u(x, y, t) to try the numerical method to diagram the state of motion of u(x, y, t). Finally, we expect that the four-point forces tests of the long pieces of cement sticks can achieve the crack in equal partition. The crack network of the cement disk are similar to that one chessboard when the cement disks subjected to thermal stress and contributed crack, however, the experimental results can not realize our expectancy.