Constitutive Modeling of the Densification Behavior in Open-Porous Cellular Solids
نویسندگان
چکیده
The macroscopic mechanical behavior of open-porous cellular materials is dictated by the geometric and material properties their microscopic cell walls. overall compressive response such divided into three regimes, namely, linear elastic, plateau densification. In this paper, a constitutive model presented, which captures not only elastic regime subsequent pore-collapse, but also shown to be capable capturing hardening upon densification network. Here, network considered made up idealized square-shaped cells, whose walls undergo bending buckling under compression. Depending on choice damage criterion, viz. or irreversible bending, collapse. These collapsed cells are then assumed behave as nonlinear springs, acting foundation active open cells. To end, decomposed an one. strain at onset quantified point intersection two stress-strain curves. A parameter sensitivity analysis presented demonstrate range different characteristics that capturing. proposed further validated against types nanoporous shows good agreement.
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ژورنال
عنوان ژورنال: Materials
سال: 2021
ISSN: ['1996-1944']
DOI: https://doi.org/10.3390/ma14112731