Experimental and numerical determination of the mechanical properties of spruce wood

Gorazd Fajdiga (Author), Denis Rajh (Author), Branko Nečemer (Author), Srečko Glodež (Author), Matjaž Šraml (Author)

Abstract

The objective of this paper is the computational and experimental study of the fracture behavior of spruce wood under quasi-static loading conditions during a three-point bending test. The experimental tests were performed on the electronic testing machine Zwick Z100 (Zwick-Roell GmbH & Co. KG, Ulm, Germany) with displacement control, according to the standard International Standard Organisation (ISO) 13061-4: 2014. The specimens were made of Norway spruce (Picea abies) wood, with dimensions of 25 mm x 25 mm in cross-section and 549 mm in length. Six tests were performed for each orientation (radial and tangential) of the wood fibres. Based on the experimental results, the computational model was created and validated by considering the mechanical responses in two different directions due to the orientation of the wood fibres. An orthotropic material model with damage evolution was selected as the computational model. The computational model was validated using the inverse procedure for the determination of the constitutive material parameters, including the damage parameters of three-point bending test specimens. A finite element method (FEM) in the framework of program package ABAQUS was used for the computational simulation, while the open code Optimax was used for the optimization procedure. Comparison between the experimental and computational force vs. the displacement response showed a very good correlation in the results for the spruce wood specimens under three-point bending tests, with Pearsonʹs correlation coeffcient of r = 0.994 for the tangential and r = 0.988 for the radial orientation. Therefore, validation of the proposed computational model was confirmed, and can be used further in numerical simulations of the fatigue behavior of wood specimens.

Keywords

smrekov les;mehanske lastnosti;numerična simulacija;tri točkovni upogibni preskus;spruce wood;mechanical properties;three-point bending test;numerical simulation;

Data

Language:	English
Year of publishing:	2019
Typology:	1.01 - Original Scientific Article
Organization:	UL BF - Biotechnical Faculty
UDC:	630*8
COBISS:	3150985
ISSN:	1999-4907
Views:	169
Downloads:	70
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	smrekov les;mehanske lastnosti;numerična simulacija;tri točkovni upogibni preskus;
Type (COBISS):	Scientific work
Pages:	1-12 str.
Volume:	ǂVol. ǂ10
Issue:	ǂiss. ǂ12
Chronology:	2019
DOI:	10.3390/f10121140
ID:	13870647