Modeling of Laminated Veneer Lumber Beams with Holes Using Cohesive Elements
| Autor: | Manoochehr Ardalany, Peter J. Moss, Massimo Fragiacomo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry Mechanical Engineering 0211 other engineering and technologies 020101 civil engineering Fracture mechanics Laminated veneer lumber 02 engineering and technology Building and Construction Structural engineering 0201 civil engineering Mechanics of Materials 021105 building & construction Ultimate tensile strength Crack initiation Fracture (geology) Perpendicular Electrical wiring General Materials Science business Beam (structure) Civil and Structural Engineering |
| Zdroj: | Journal of Structural Engineering. 142 |
| ISSN: | 1943-541X 0733-9445 |
| DOI: | 10.1061/(asce)st.1943-541x.0001338 |
| Popis: | Openings are usually required in timber beams to allow services like plumbing, sewage pipes, and electrical wiring to run through. These openings can cause significant stresses perpendicular to the grain direction, which may create cracks in the timber due to the low tensile strength perpendicular to grain. Initiation and propagation of cracks markedly decrease the load-carrying capacity of a beam with a hole with respect to a beam without a hole. The use of plywood or screw reinforcement can recover the full capacity of the beam. Crack initiation and propagation in timber is a challenging issue that requires a good numerical model for an accurate prediction. Analysis methods such as linear elastic fracture mechanics (LEFM) have previously been used to predict the failure load of beams with holes with initial and iteratively extended crack length. In this paper, cohesive elements with traction-separation behavior are used for the modeling of the fracture layer in laminated veneer lumber (LVL) beam... |
| Databáze: | OpenAIRE |
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