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Multi-Scale Modelling of Rolling Shear Failure in Cross-Laminated Timber Structures by Homogenisation and Cohesive Zone Models

https://research.thinkwood.com/en/permalink/catalogue422
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Saavedra Flores, Erick
Saavedra, Karin
Hinojosa, Jorge
Chandra, Yatish
Das, Raj
Publisher
ScienceDirect
Year of Publication
2016
Country of Publication
Netherlands
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Rolling shear
Failure
Cohesive Zone Model
Multi-Scale Modelling
Homogenisation
Language
English
Research Status
Complete
Series
International Journal of Solids and Structures
Summary
In this paper we investigate the rolling shear failure in cross-laminated timber structures by homogenisation and cohesive zone models. In order to predict the structural response, four spatial scales are interlinked within a purely kinematic multi-scale modelling framework. The constitutive description has incorporated information coming from the wood cell-wall in the order of a few nanometres, wood fibres with dimensions of tens of micrometres and growth rings described by a few millimetres. The computational homogenisation scheme is solved sequentially from the lowest to the highest level in order to determine the effective mechanical properties for the fourth (structural) scale represented by a cross-laminated timber plate with dimensions of the order of one meter. In order to simulate the cracking in the material, a cohesive zone model is adopted at the homogenised macroscopic scale. The finite element problem is then solved using a mixed domain decomposition strategy due to its huge number of unknowns. This approach allows us to capture interlaminar and inter-fibre cracking and to solve the macroscopic equilibrium problem using parallel computations. Our numerical predictions are compared with experimental results and are validated successfully. In particular, we study the influence of wood density, edge-gluing and span-to-depth ratio on the rolling shear failure in cross-laminated timber.
Online Access
Free
Resource Link
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Numerical Study on De Elastic Buckling of CLT Walls Subjected to Compressive Loads

https://research.thinkwood.com/en/permalink/catalogue2169
Year of Publication
2019
Topic
Design and Systems
Connections
Material
CLT (Cross-Laminated Timber)
Application
Walls

Progressive Damage Modelling in Cross-Laminated Timber Structures by Computational Homogenisation and Cohesive Zone Models

https://research.thinkwood.com/en/permalink/catalogue1608
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Saavedra Flores, Erick
Saavedra, Karin
Hinojosa, Jorge
Das, Raj
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Damage
Cohesive Zone Model
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 2116-2123
Summary
In this paper we investigate the damage process in cross-laminated timber (CLT) structures by a computational homogenisation approach enriched with cohesive zone models. In order to predict the undamaged structural response, four spatial scales are interlinked within a multi-scale finite element modelling scheme. To simulate the cracking process in the material, a cohesive zone model (CZM) is adopted at the homogenised macroscopic scale. This double approach allows us to model successfully the progressive damage process in CLT plates subject to threepoint bending.
Online Access
Free
Resource Link
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