A general framework for the numerical implementation of anisotropic hyperelastic material models including non-local damage

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

Ferreira, JPS (Autor) FEUP; Parente, MPL (Autor) FEUP; Jabareen, M (Autor) Outra; Renato Natal Jorge (Autor) FEUP

Revista

Título: Biomechanics and Modeling in Mechanobiology

Vol. 16

Páginas: 1119-1140

ISSN: 1617-7959

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 13 Citações

Outras Informações

ID Authenticus: P-00M-DWJ

DOI: 10.1007/s10237-017-0875-9

Abstract (EN): The highly nonlinear mechanical behaviour of soft tissues solicited within the physiological range usually involves degradation of the material properties. Mechanically, having these biostructures undergoing such stretch patterns may bring about pathological conditions related to the steady deterioration of both collagen fibres and material's ground substance. Tissue and subject variability observed in the phenomenological mechanical characterisation of soft tissues often hinder the choice of the computational constitutive model. Therefore, this contribution brings forth a detailed overview of the constitutive implementation in a computational framework of anisotropic hyperelastic materials with damage. Surmounting the challenge posed by the mesh dependency pathology requires the incorporation of an integral-type non-local averaging, which seeks to include the effects of the microstructure in order to limit the localisation phenomena of the damage variables. By adopting this approach, one can make use of multiple developed material models available in the literature, a combination of those, or even propose new models within the same numerical framework. The numerical examples of three-dimensional displacement and force-driven boundary value problems highlight the possibility of using multiple material models within the same numerical framework. Particularities concerning the considered material models and the damage effect implications to represent the Mullins effect, induced anisotropy, hysteresis, and mesh dependency are discussed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 22