Quantifying Co-Deformation Effects in Metallic Laminates by Loading–Unloading–Reloading Tensile Tests

Heterostructured materials such as metallic laminates (LMCs) can be specifically tailored to showcase significantly increased mechanical behavior based on the hetero-deformation-induced (HDI) strengthening effect caused by co-deformation at vicinity of interfaces. This study introduces a new approach quantify these effects in characterizing inelastic back strain upon unloading. Experimentally, (IBS) is determined cyclic loading–unloading–reloading (LUR) tensile tests. Compared linear rule mixture (ROM) approximation used reference, additional amounts were measured for different laminate systems, strongly depending dissimilarities yield strength and elastic moduli constituents interface density laminates. Conducting finite element analysis, distribution residual plastic was investigated this study. Based this, schematic overview spatial hetero-deformation zone with dissimilar derived, summarizing results As most components are subject stresses during application, method provided characterize microyielding regime enables valuable insights into mechanisms affecting deformation future applications.