Numerical modeling of screw connector performance in LVL under shear loading

Document Type : Research Paper

Authors

1 Writer

2 Professor, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran

3 Professor, Department of Wood & Paper Science and Technology Faculty of Natural Resources University of Tehran

Abstract

Joints are one of the most important parts in engineering design of structure, since they are basis of structural failures. Therefore manufacturers are interested in to make sure that strength of proposed joints in structure is sufficient. Numerical analysis is an assuring method for joints strength assessment. In this study, finite element method modeling was applied to evaluate performance of screw connected joints with Laminated Veneer Lumber (LVL) members, under shear load, applied parallel and perpendicular to edge of side member. Test joints were made with screw, having diameter range of 4.2, 5 and 6 mm. ANSYS software was used to simulate joints for evaluating value of stress history resulting from applied load. Results have shown that the highest strength has occurred in pilot holes in main member and middle of screw’s shank. These values of stresses had higher rate when joint was loaded parallel to the edge of side member. Modes of failure were observed in test joints, bearing and bell shape, at points where the highest stresses were generated. Collected data have indicated that joints under perpendicular load to the had rather better performance. Stress carrying capacity of joint under parallel load to the edge of side member decreases with increase in diameter of screw, while in perpendicular loading, it increases with increasment of screw diameter. Since good agreement is seen between experimental data and numerical results, this method is recommended for analysing and predicting failure of joints in furniture structures.

Keywords

References

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Forest and Wood Products
Volume 74, Issue 3
December 2021
Pages 357-369

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