Advanced numerical investigation on adhesive free timber structures. (15th August 2020)

• Record Type: Journal Article
• Authors: Bouhala, L.; Fiorelli, D.; Makradi, A.; Belouettar, S.; Sotayo, A.; Bradley, D.F.; Guan, Z.
• Is Part Of: Composite structures. Volume 246(2020)
• Publication Date: 2020-08-15
• Subjects: Timber modeling -- Mechanical properties -- Dowel laminated timber beams -- Parametric design; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2020.112389
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: In this study, we developed a constitutive law for wood useful as a user material subroutine (Umat) in Abaqus software. To calibrate the model, compression/tensile tests were carried out on simple geometry samples and to check the validity, we subsequently considered two simulation cases; namely the push out double shear and the four-point bending tests. Moreover, we developed a generic Python script for each test to be used repeatedly for parametric studies. All the numerical aspects are controlled by a user-friendly graphical interface that can display the relevant results and performs simultaneous comparisons with the experimental results. Firstly, the properties of the compressed and uncompressed wood were identified in the longitudinal, radial and tangential directions using a quasi-inverse problem. Then these properties are used in the simulation of the two numerical tests. Consequently, the obtained numerical joint-slip versus load curve from the push out double shear simulation agrees well with the experimental curve. Furthermore, dowel laminated timber tested in four-point bending were correctly simulated and provided numerical results very close to experimental results.