Numerical and Theoretical Study on Mechanical Behaviors of New Dovetail Joint System (NDJs) Subjected to Tensile, Compressive, and Out-of-plane Bending Moment Forces

다국어 초록 (Multilingual Abstract)

In this study, a new dovetail system of single-layer reticulated shell socketed joint (NDJs) of steel with excellent mechanical behaviour and economic benefi ts is suggested and investigated. Theoretical and numerical approaches were adopted to explore the infl uence of the diff erent design parameters on the mechanical behaviour of NDJs under axial tension, compression forces and out-of-plane bending moment. First, NDJs exhibited two main failure modes under compressive force which occurred in the H-section beam and throat neck. On the other hand, the failure of the NDJs under tensile force occurred on the slot edges and hub ring, which means the NDJs TYS bearing capacity is responsive to slot edge width ( d m ) and hub ring thickness ( d w ).
Moreover, the resisting bending failure characteristics of NDJs combined characteristics of resisting compressive and tensile forces. Second, formulae of compressive, tensile, and bending yield strength bearing capacity of NDJs were derived, and the average of analytical to numerical results was calculated. Analytical analysis results matched very well with the FEA results and showed a very high calculation validity and effi ciency. Finally, NDJs shows excellent behaviour under diff erent axial loads and bending moment comparing with other types of bolted or assembled joints with the same size or used materials.

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