Imperial College London
Alternate

ProfessorAhmedElghazouli

Faculty of Engineering, Department of Civil and Environmental Engineering

Emeritus Professor of Structural Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6021a.elghazouli

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

440Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sirumbal-Zapata:2018:10.1016/j.compstruc.2017.09.010,
author = {Sirumbal-Zapata, LF and Málaga-Chuquitaype, C and Elghazouli, AY},
doi = {10.1016/j.compstruc.2017.09.010},
journal = {Computers and Structures},
pages = {47--63},
title = {A three-dimensional plasticity-damage constitutive model for timber under cyclic loads},
url = {http://dx.doi.org/10.1016/j.compstruc.2017.09.010},
volume = {195},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The performance of timber structures is governed by the nonlinear response at their connections, where high deformation levels and stress concentrations are developed, particularly when subjected to load reversals. To date, no constitutive model for wood under cyclic load exists which is able to incorporate its most important failure modes while considering plastic deformations and cyclic stiffness and strength degradation simultaneously. This paper presents the formulation and implementation of a plasticity-damage model with these characteristics within a continuum mechanics approach. The theoretical framework of both plasticity and damage models is described, and a detailed derivation of the constitutive equations required for their computational implementation and coupling as well as the return mapping and iterative algorithms for their integration are presented. The damage evolution process is handled by two independent scalar variables for tension and compression. A general orthotropic plasticity yield surface with isotropic hardening is employed to incorporate timber plastic flow in compression. A closed-form expression for the plasticity-damage consistent tangent operator is derived. It is demonstrated that the proposed constitutive model captures all the key characteristics required for an accurate modelling of timber under large deformation levels until failure.
AU  - Sirumbal-Zapata,LF
AU  - Málaga-Chuquitaype,C
AU  - Elghazouli,AY
DO  - 10.1016/j.compstruc.2017.09.010
EP  - 63
PY  - 2018///
SN  - 0045-7949
SP  - 47
TI  - A three-dimensional plasticity-damage constitutive model for timber under cyclic loads
T2  - Computers and Structures
UR  - http://dx.doi.org/10.1016/j.compstruc.2017.09.010
UR  - https://www.sciencedirect.com/science/article/pii/S0045794917308532?via%3Dihub
UR  - http://hdl.handle.net/10044/1/51231
VL  - 195
ER  -
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