Development of an integrated micro macro model for anticipating matrix cracking evolution and fiber breakage in the laminated composite containing an open hole

• Published in: Engineering fracture mechanics 2019-04, Vol.211, p.161-179
• Main Authors: Farrokhabadi, Amin, Babaei, Ramzan
• Format: Article
• Language: English
• Subjects: Axial stress; Breakage; Composite materials; Constitutive models; Cracking (fracturing); Damage assessment; Elasticity; Fiber breakage; Integrated Micro-Macro; Laminates; Mathematical models; Matrix cracking; Micromechanics; Numerical methods; Progressive damage; Stiffness; Stress concentration; Stress distribution
• ISSN: 0013-7944; 1873-7315
• DOI: 10.1016/j.engfracmech.2019.02.004

•Applying the classical elasticity formulation to obtain the stress distribution of 2D RVEs.•Using the concept of instant local failure in the RVE to obtain the lamina stiffness degradation in macro level.•Applying the appropriate failure criteria to assess the damage formation in RVE.•Development of a CDM model for assessment of the progressive damage formation.•Investigating the response of open-hole composites subjected to axial loadings. The present study investigates the progressive damage formation in open-hole laminated composites subjected to axial tensile and compressive loading using a proposed constitutive model. To this aim, using the classical elasticity formulation, the stress distribution of a two-dimensional representative volume element (RVE) subjected to general remote loads, which is extracted from an arbitrary lamina in composite laminate, will be evaluated. Then, based on micromechanical damage criteria, the failure of the RVE (matrix or fiber) will be examined. Afterward, the concept of instant local failure in the RVE based on the mentioned failure criteria and further lamina stiffness degradation in macro level are implemented in ANSYS FE code. Finally, the progressive damage analysis of different open-hole laminated composites will be assessed and verified with the accessible numerical and experimental methods. The obtained results demonstrate an acceptable agreement with the available experimental outcomes. According to this, the proposed approach can be used as a reliable tool to analyze the formation of matrix cracking and fiber rupture in different composite laminates with the least computational costs.