Meso-makromechanische Modellierung von Faserverbundwerkstoffen mit Schaedigung

In the presented thesis a continuum material model and the algorithmen belonging to it are developed and described in order to simulate numerically the damage of fiber-reinforced composite within the context of the finite element method. In the model the development of macrostructural material damage is simulated, considering directly the damage growth at the microscale. The macroscopic material model is based on the local analysis of the damage growth in a representative volume element, which is statistical representative for the mesostructure. The macroscopic stress-strain relations are available by a homogenization procedure, which is based on the average of the mesoscopic field variables determined during the analysis of the mechanical behaviour of the representative volume element. The constitutive equations, which describe the macroscopic material behaviour, could determined on this basis. Furthermore the macroscopic stress-strain relations are used to identify the introduced macroscopic material parameter. In this thesis the failure of fiber-reinforced composite caused by matrix-crack is simulated numerically. Further inelastic displacements, as a result of the contact friction in the interface, are considered in the model. This inelastic displacements could occur after the crack between fiber and matrix. (orig.)SIGLEAvailable from TIB Hannover: RN 2767(2001,3)+a+b / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman