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Effects of ring characteristics on the compressive strength and dynamic modulus of elasticity of seven softwood species
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Cheng-Jung Lin
Published/Copyright:
June 12, 2007
Abstract
The effects of ring characteristics on the compressive strength and dynamic modulus of elasticity of seven softwood species in Taiwan were examined. The results revealed good correlation between compressive strength and dynamic modulus of elasticity obtained using an ultrasonic wave technique (correlation coefficient r=0.77–0.86). Overall, compressive strength increased with decreasing ring width parameters and increasing ring density parameters. Ring density was related to compressive strength, but was not the sole factor affecting the wood strength. According to our statistical analysis, compressive strength was affected by various ring characteristics. Relationships between ring characteristics and compressive strength are influenced by the anatomic direction. Results revealed that earlywood density and minimum density in a ring are equally important variables for evaluating the compressive strength of wood.
Received: 2006-11-15
Accepted: 2007-4-2
Published Online: 2007-06-12
Published in Print: 2007-6-1
©2007 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Meetings
- Micromechanical modeling of solid-type and plate-type deformation patterns within softwood materials. A review and an improved approach
- Failure mechanisms in wood-based materials: A review of discrete, continuum, and hybrid finite-element representations
- Morphological lattice models for the simulation of softwood failure and fracture
- Experimental and numerical investigation of wood fracture mechanisms at different humidity levels
- Material point method simulations of transverse fracture in wood with realistic morphologies
- Simulation of cracks in wood using a coupled material model for interface elements
- Preliminary tests to evaluate the mechanical properties of young trees with small diameter
- Characterization and strength modeling of parallel-strand lumber
- Dynamic behaviour of cork and cork-filled aluminium tubes: Numerical simulation and innovative applications
- A numerical study of the transverse modulus of wood as a function of grain orientation and properties
- Effects of ring characteristics on the compressive strength and dynamic modulus of elasticity of seven softwood species
- Experimental device for the accurate determination of wood-water relations on micro-samples
- Evaluating the suitability of hybrid poplar clones for the manufacture of oriented strand boards
- Finely milled kenaf core as a natural plywood binder
- Alkaline peroxide treatment of ECF bleached softwood kraft pulps. Part 1. Characterizing the effect of alkaline peroxide treatment on carboxyl groups of fibers
- Alkaline peroxide treatment of ECF bleached softwood kraft pulps: Part 2. Effect of increased fiber charge on refining, wet-end application, and hornification
- Molar mass determination of lignins by size-exclusion chromatography: towards standardisation of the method
