Modeling strain-induced dual-phase transformation in semicrystalline polylactide

Polylactic acid or polylactide (PLA) can form amorphous, semicrystalline, highly crystalline structure. In this paper, we provide a model for semicrystalline PLA under strain-induced dual-phase transformation, between mesomorphization and crystallization. the proposed constitutive model, use an internal state variable approach by considering initial microstructure, intermolecular features, preferred network orientation-induced anisotropy. The effective contribution of newly created phases is considered in both elastic-viscoplastic resistance viscohyperelastic using micro–macro transition approach. We find good agreement experimental data terms progressive evolution mesomorphic/crystalline along with stress–strain behavior up to very large strains over wide range crystallinities. relationship crystallinity, molecular ordering, phases, mechanical response discussed.