Print Email Facebook Twitter Development and validation of an orthotropic 3D elasto-plastic damage model for wood, considering fiber deviations Title Development and validation of an orthotropic 3D elasto-plastic damage model for wood, considering fiber deviations Author Seeber, Franziska (Technische Universität München) Khaloian-Sarnaghi, Ani (Technische Universität München) Yu, Taoyi (Technische Universität München) Duddeck, Fabian (Technische Universität München) van de Kuilen, J.W.G. (TU Delft Bio-based Structures & Materials; Technische Universität München) Date 2024 Abstract This contribution aims for an enhanced numerical representation for strength prediction of timber. This implies a validated elasto-plastic continuum damage model which considers orthotropy and heterogeneity of the material, and represents the ductile behavior under compression and the brittle material behavior under tension dependent on the three-dimensional orthogonal fiber directions. The behavior under compression is captured by Hill (1948) plasticity and an exponential hardening law enhanced by the loading direction dependency. The same model covers also the brittle damaging behavior by means of continuum damage mechanics (CDM). In this study, a separated damage mode (SDM) criterion with simultaneously evolving damage variables is investigated. After the experimental validation of the model for axially loaded clear wood samples, the developed numerical model is implemented to a sawn timber with fiber deviation, where homogenization of the material and simplification to transverse isotropy is not anymore possible. The 3D orthotropic material behavior is experimentally validated for this application example with bi-axial loading and aims for further numerical investigation of wood with heterogeneities as occurring in sawn (hard)wood for its efficient use in engineered wood products such as glued laminated timber. Subject 3D orthotropic materialsElasto-plastic CDMExperimental clear wood validationFailure modesFiber deviationsHeterogeneity To reference this document use: http://resolver.tudelft.nl/uuid:fe38cfa8-6c48-4832-8906-bbbc1e87cd89 DOI https://doi.org/10.1016/j.engstruct.2024.117928 ISSN 0141-0296 Source Engineering Structures, 308 Part of collection Institutional Repository Document type journal article Rights © 2024 Franziska Seeber, Ani Khaloian-Sarnaghi, Taoyi Yu, Fabian Duddeck, J.W.G. van de Kuilen Files PDF 1-s2.0-S0141029624004905-main.pdf 6.48 MB Close viewer /islandora/object/uuid:fe38cfa8-6c48-4832-8906-bbbc1e87cd89/datastream/OBJ/view