elastic mechanics
3.The application of elastic mechanics in launch vehicle technology perfects flight theory. The application of elastic mechanics and two-phase flow theory suppresses POGO. Considering the difference between space and earth, the stress of mechanics is transferred from gravity to molecular force, and the application of two-phase flow and three-phase flow theory resolves key technical problems in engine restart.
5.From basic equations of elastic mechanics, related knowledge of fracture mechanics and frequent used methods of differential and integral calculus, bending fracture models of anisotropic functionally graded materials is established by assuming that material constants (stiffness matrix component) are expressed in arbitrary functions.
6.The fundamental solutions of complex stress functions or stress intensity factorsfor the equal-parameter orthotrpic plate containing an elliptical hole or a crack are derivedwith the Cauchy integral method,those fundamental solutions are very useful to solve someproblems in elastic mechanics and fracture mechanics by BEM。
10.Definition of strain seems to be simple,but it has great meaning A good definition of strain is usually solid base of deformation mechanics The elastic plastic mechanics is based on the Cauchy strain,but it has clear shortcomings,and more clear in the process of the large deformation limitations of Cauchy,Green strain and the accuracy of Koerbar Swainger strain are analysed simply by using the method of geometrical analysis,some examples are used to prove them
