Discrete element model for quasi‐brittle rupture under tensile and compressive loading

摘要: Summary In the absence of initial cracks, material behavior is limited by its strength, usually defined in homogeneous conditions (of stress and strain). Beyond this limit, quasi-brittle case, cracks may propagate tends to be well described fracture mechanics. Discrete element approaches show consistent results dealing with transition during rupture. However, calibration parameters numerical models (i.e., stiffness, toughness) quite complex sometimes only approximative. Based on a brittle rupture criterion, we analyze biaxial response uncracked samples. Thus, tensile compressive strengths are analytically identified become direct our discrete model. Furthermore, physically reliable crack initiation (and subsequent propagation) shown induced verified simulation three-point bending diametral compression tests. Copyright © 2016 John Wiley & Sons, Ltd.