We investigate elastic-plastic adhesive wear via a continuum variational phase-field approach. The model seamlessly captures the transition from perfectly brittle, over quasi-brittle to elastic-plastic wear regimes, as the ductility of the contacting material increases. Simulation results highlight the existence of a critical condition that morphological features and material ductility need to satisfy for the adhesive junction to detach a wear debris. We propose a new criterion to discriminate between non-critical and critical asperity contacts, where the former produce negligible wear while the latter lead to significant debris formation.
翻译:我们通过连续的变异阶段法调查弹性塑料粘合性磨损。该模型无缝地捕捉了从完全易碎的、超准易碎的到弹性塑料磨损系统的过渡,因为接触材料的粘附性在增加。模拟结果突出表明存在一种关键条件,即形态特征和物质粘合性需要满足粘合性连接点,才能拆解磨损碎片。我们提出了一个新标准,以区分非临界和临界的接触,即前者产生微不足道的磨损,而后者则导致大量碎片形成。