A model has been proposed recently, which describes the experimentally observed mechanical behavior of some shape memory polymers. It considers a purely thermoelastic behavior, without strain rate effects, and assumes essentially that the polymer can be considered as a two-phase composite, with glassy and rubbery phases having volume fractions that depend on temperature only. Since a uniform stress hypothesis was used in the original formulation, with an inconsistency when thermal expansion was considered, this model is revisited here by taking advantage of many results that have been established in the theory of composite materials. It is shown, especially, that a uniform strain hypothesis is more appropriate than assuming a uniform stress.
Pierre Gilormini 1; Julie Diani 1
@article{CRMECA_2012__340_4-5_338_0, author = {Pierre Gilormini and Julie Diani}, title = {On modeling shape memory polymers as thermoelastic two-phase composite materials}, journal = {Comptes Rendus. M\'ecanique}, pages = {338--348}, publisher = {Elsevier}, volume = {340}, number = {4-5}, year = {2012}, doi = {10.1016/j.crme.2012.02.016}, language = {en}, }
TY - JOUR AU - Pierre Gilormini AU - Julie Diani TI - On modeling shape memory polymers as thermoelastic two-phase composite materials JO - Comptes Rendus. Mécanique PY - 2012 SP - 338 EP - 348 VL - 340 IS - 4-5 PB - Elsevier DO - 10.1016/j.crme.2012.02.016 LA - en ID - CRMECA_2012__340_4-5_338_0 ER -
Pierre Gilormini; Julie Diani. On modeling shape memory polymers as thermoelastic two-phase composite materials. Comptes Rendus. Mécanique, Recent Advances in Micromechanics of Materials, Volume 340 (2012) no. 4-5, pp. 338-348. doi : 10.1016/j.crme.2012.02.016. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.02.016/
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