A mesh technique useful in finite element modeling of wood structural systems

In a recently completed study by the authors, a finite element model to predict the load-deformation behavior of a bolted joint in wood subjected to combined bending and tension (bending/tension) loading was developed and verified (1,2). Although the finite element method is commonly used in forest products related research, a unique feature of the model (previously unseen in the forest products related literature) that accounts for the presence of the steel bolt and wood member at the same cross-sectional location is highlighted in this technical note. This mesh superposition technique enables a three-dimensional (3-D) system to be idealized in two dimensions (2-D). This technique, developed by researchers studying combined loading of bolted joints in steel structures (4,5), models the wood and bolt in the same plane (1.2). A series of independent nodal points (nodes) and elements are generated to represent each material. Common boundaries are recognized by using the same nodes in different elements associated with both materials. Elsewhere in the critical section, independent, but coincident, nodes are used to define elements representing each material.

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