Nonlinear Analysis Of Mic-laminated Composite Structure Based On Couple Stress Theory And Large Deformation

With the progress of the times, in21st century,people’s requirements which in use ofmaterial are not satisfied with traditional types. Today in order to meet the broader needs ofthe engineering practice,the use of composite materials is increasingly wide. In order to betteruse of special performance of composite materials, new requirements have been put forwardby engineer and scientist. Classical mechanic is no longer applicable, especially inmicro-structure,which because of scale effect. Micro-coupling stress theory has become anew field of mechanics development.This article is divided into four parts. The first chapter introduces the applicationsituation and prospect of composite materials in the microstructure. List the classic couplestress theory, modified couple stress theory, new modified couple stress theory. The secondchapter applies new modified couple stress theory to the composite laminated beam, twocontrol equation are given respectively Timoshenko composite laminated beam and Reddycomposite laminated beam, and reveals the inner link of two beam, and the inner link withclassic theory. This simple degradation relationship to facilitate the practical application, alsois a huge advantage of the new modified couple stress theory. The third chapter gives twokinds of method to calculate laminated beam, the analytic solution and numerical solution.Author list some current analytical solution can be obtained, at the same time, this paperintroduces several kinds of practical numerical solutions. In the fourth chapter author uselarge deformation laminated Timoshenko beam with uniformly distributed load as an exampleto solve the numerical solution and provide a complete computer programme based on matlabplatform application.