A micromechanically based model for dynamic damage evolution in unidirectional composites
2022 (English)In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 238, article id 111368Article in journal (Refereed) Published
Abstract [en]
This article addresses the micromechanically motivated, quasistatic to dynamic, failure response of fibre reinforced unidirectional composites at finite deformation. The model draws from computational homogenization, with a subscale represented by matrix and fibre constituents. Undamaged matrix response assumes isotropic viscoelasticity–viscoplasticity, whereas the fibre is transversely isotropic hyperelastic. Major novelties involve damage degradation of the matrix response, due to shear in compression based on a rate dependent damage evolution model, and the large deformation homogenization approach. The homogenized quasi-brittle damage induced failure is described by elastically stored isochoric energy and plastic work of the undamaged polymer, driving the evolution of damage. The developed model is implemented in ABAQUS/Explicit. Finite element validation is carried out for a set of off-axis experimental compression tests in the literature. Considering the unidirectional carbon–epoxy (IM7/8552) composite at different strain rates, it appears that the homogenized damage degraded response can represent the expected ductile failure of the composite at compressive loading with different off-axes. Favourable comparisons are made for the strain and fibre rotation distribution involving localized shear and fibre kinking. © 2021 The Authors
Place, publisher, year, edition, pages
Elsevier Ltd , 2022. Vol. 238, article id 111368
Keywords [en]
Continuum damage, Homogenization, Off-axis compression loading, Unidirectional ply, Viscoplasticity, ABAQUS, Compression testing, Deformation, Plasticity, Strain rate, Compression loading, Damage evolution, Dynamic damage, matrix, Off-axis, Unidirectional composites, Fibers
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:ri:diva-57498DOI: 10.1016/j.ijsolstr.2021.111368Scopus ID: 2-s2.0-85121235543OAI: oai:DiVA.org:ri-57498DiVA, id: diva2:1623756
Note
Funding details: 721256; Funding details: Stiftelsen för Strategisk Forskning, SSF, 25201, FID16-0041; Funding details: VINNOVA, 2016-04239; Funding details: Horizon 2020; Funding text 1: The authors gratefully acknowledge the support of the ICONIC project under the Marie Skłodowska-Curie grant agreement No 721256 of the European Union Horizon 2020 research and innovation programme . Co-funding has also been provided from the Swedish FFI programme via VINNOVA (dnr 2016-04239 ), SSF, Sweden (dnr FID16-0041 ) and from the development funds of RISE, Sweden (RISE SICOMP SK-project 25201).
2021-12-302021-12-302023-06-07Bibliographically approved