Abstract
Structural heterogeneities in wood are changing the complexity of the numerical modelling of this material. Knots are the main strength governing parameters, which are changing the uniformity of the stress distributions through the boards. These weak locations may result in failure in the material. Comprehensive reconstruction of the boards, based on the knot data on the surfaces of the boards makes it possible to access the virtual model of the element and predict new material behaviors. The aim of the current study is to develop a more technologically advanced numerical method for grading of the wooden boards. Simulations are run using ABAQUS and PYTHON. By programming the structural model of the boards, covering the total quality range, the mechanical behavior is predicted under a uniform tension. Simulations are run for low-medium quality Douglas fir and mediumhigh quality spruce boards. Based on the extracted numerical parameters, the strength of the boards are predicted virtually. The results of the simulations are benchmarked to the currently available visual and machine grading methods. By getting a promising correlation between the tensile and the predicted strength results, a more advanced numerical method is provided for virtual strength grading of the boards. The method is later applied for the reconstruction of the glulam model based on the information of the single lamellas.
| Original language | English |
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| Title of host publication | WCTE 2018 - World Conference on Timber Engineering |
| Publisher | World Conference on Timber Engineering (WCTE) |
| Number of pages | 8 |
| Publication status | Published - 2018 |
| Event | WCTE 2018: 2018 World Conference on Timber Engineering - Seoul, Korea, Republic of Duration: 20 Aug 2018 → 23 Aug 2018 http://wcte2018.kr |
Conference
| Conference | WCTE 2018: 2018 World Conference on Timber Engineering |
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| Abbreviated title | WCTE 2018 |
| Country/Territory | Korea, Republic of |
| City | Seoul |
| Period | 20/08/18 → 23/08/18 |
| Other | WCTE is the world's premier forum for presenting and discussing the latest technical and architectural developments and innovations in wood or timber construction. WCTE is the most prestigious international event in timber engineering, engineered wood products and design of timber structures, which is held biennially in different parts of the world and attracts researchers, engineers and architects, code consultants and building officials, contractors and project managers, fabricators and suppliers from all continents. During WCTE 2018 the traditional focus on timber engineering and material science will be complemented by architecture related topics such as evaluation methods for green buildings and by an own platform for computer-based methods for modelling, parametric design, production, etc. |
| Internet address |
Keywords
- Fiber deviation
- Finite element analysis
- Strength grading