Three-dimensional stress states at crack tip induced by shear and anti-plane loading

3D printing of biomimetic composites with improved fracture toughness

This book describes the basics and developments of the new XFEM approach to fracture analysis of composite structures and materials. It provides state of the art techniques and algorithms for fracture analysis of structures including numeric examples at the end of each chapter as well as an accompanying website which will include MATLAB resources, executables, data files, and simulation procedures of XFEM. • The first reference text for the extended finite element method (XFEM) for fracture analysis of structures and materials • Includes theory and applications, with worked numerical problems and solutions, and MATLAB examples on an accompanying website with further XFEM resources • Provides a comprehensive overview of this new area of research, including a review of Fracture Mechanics, basic through to advanced XFEM theory, as well as current problems and applications • Includes a chapter on the future developments in the field, new research areas and possible future applications of the method

XFEM fracture analysis of composites

https://hal.archives-ouvertes.fr/hal-01302550/document

3D crack propagation with cohesive elements in the extended finite element method

In this paper, a new loading fixture is suggested for exploring mixed mode I/III fracture experimentally. Then, the advantages of the fracture test configuration in comparison with the previously presented ones are introduced. Using finite element analysis, the crack parameters of the associated test specimen are obtained for various mixed mode loading conditions. The numerical results show that the designed loading apparatus can create various mode mixities from pure mode I to pure mode III. Subsequently, a series of fracture tests are conducted on PMMA using the proposed test configuration. It is shown that the results of fracture toughness and fracture angles obtained from the experiments are in relatively good consistency with those predicted from the well-known maximum tangential stress criterion.

Jun Chang

Papers

A general mixed-mode brittle fracture criterion for cracked materials