@article{BrunoKachanovSevostianovetal.2018, author = {Bruno, Giovanni and Kachanov, Mark and Sevostianov, Igor and Shyam, Amit}, title = {Micromechanical modeling of non-linear stress-strain behavior of polycrystalline microcracked materials under tension}, series = {Acta materialia}, volume = {164}, journal = {Acta materialia}, publisher = {Elsevier}, address = {Oxford}, issn = {1359-6454}, doi = {10.1016/j.actamat.2018.10.024}, pages = {50 -- 59}, year = {2018}, abstract = {The stress-strain behavior of microcracked polycrystalline materials (such as ceramics or rocks) under conditions of tensile, displacement-controlled, loading is discussed. Micromechanical explanation and modeling of the basic features, such as non-linearity and hysteresis in stress-strain curves, is developed, with stable microcrack propagation and "roughness" of intergranular cracks playing critical roles. Experiments involving complex loading histories were done on large- and medium grain size beta-eucryptite ceramic. The model is shown to reproduce the basic features of the observed stress-strain curves. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.}, language = {en} }