LAUSR

Abstract Application of composite materials is on the rise due to several physical and mechanical advantages. Despite these preferences, development of imperfections and cracks during manufacturing processes and service life in composite materials are highly probable. Application of any kinds of composite material in engineering purposes requires taking these cracks and imperfections into account. For this reason, fracture assessment of composite materials has been an important research topic. The prediction of failure and fracture instance of composite structures may be interesting for design purposes. The main aim of the present study is to provide a comprehensive review of the proposed mixed mode I/II criteria for fracture investigation of composite materials. The structure of this study is based on a rational division, which logically traces the progress of fracture estimation of composite materials. This study is based on the authors’ experience in the field of mixed mode fracture of composites and is not a pure review paper. Comprehensive discussion on the benefits and shortcomings for each criterion is proposed which can help the reader employ the suitable criteria for engineering applications. The focus for verification of the results is on wood as a natural composite material.