PLASTIC BENDING OF WOOD BEAMS
Abstract
IT WOULD SEEM THAT THE LINEAR DISTRIBUTION OF STRAIN IN A BEAM AND THE ELASTIC-PLASTIC NATURE OF WOOD SUBJECTED TO COMPRESSION PARALLEL TO THE GRAIN ARE VERY WELL ESTABLISHED AND SHOULD BE CONSIDERED IN INVESTIGATIONS OF AND IN THE DESIGN OF WOOD BEAMS. The methods referred to in this paper apply to beams made of straightgrained clear wood. In such beams the tensile trength is greater than the compressive strength so that usually the plastic region is well developed before failure takes place. If the tensile strength i reduced by the presence of defects to a value less than the compressive strength, no plastic region will be developed and the formulas given will not apply. If this occurs, the usual elementary engineering formula using the redced tensile strength for the modulus gives a good estimate of the bending strength. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1962
- Accession Number
- AD0290711
Entities
People
- Charles B. Norris
Organizations
- Forest Products Laboratory