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- Title
CREEP APPROXIMATION METHOD FOR BENT WOOD MATERIAL ELEMENTS.
- Authors
Baikovs, Andris; Rocēns, Kārlis
- Abstract
Method for the determination of creep curve shape coefficient, relaxation time and long-term modulus is developed for the rheological equation for typical viscous-elastic body, which is complemented with creep curve shape coefficient. Experimentally obtained deformations in five time moments are used to determine the rheological coefficients with developed method. Creep curves of five different wood materials were calculated using the developed method and compared with creep deformations of bent elements - Douglas-fir beam, three-layer medium density particleboard plate, 3-ply plywood plate, composite hardboard-webbed I-beam with Douglass-fir flanges and composite plywood webbed I-beam with Douglass-fir flanges. Using rheological coefficients calculated with developed method of coefficient determination, the difference between calculated and experimentally obtained creep curves are smaller than in the cases when for calculating of creep curves are used rheological coefficients determined using beforehand developed methods.
- Subjects
WOOD; ELASTICITY; WOOD products; PARTICLE board; RHEOLOGY; GIRDERS; EXPERIMENTS
- Publication
Telecommunications & Electronics, 2008, Vol 24, Issue 9, p6
- ISSN
1407-8880
- Publication type
Article