Predicting Load-Carrying Capacity of Dovetail Connections Using the Stochastic Finite Element Method
Keywords:Dovetail connection, stress, stochastic finite element method
AbstractThe goal of this study was to evaluate the load-carrying capacity of dovetail connections. Different tenon angles (θ), tenon neck widths (w1), tenon head widths (w2), and tenon heights (h) were used to analyze stress distribution and strength from dovetail connections using the finite element method (FEM). Although different stress distributions were found from the FEM models, shear and tension perpendicular to the grain stresses were found to be the most critical stresses controlling strength of the dovetail connection. Strength of the dovetail connection predicted from the deterministic FEM models was validated from the results of experimental tests. A combination of four geometric parameters for mortise and tenon from the dovetail connection maximizing load-carrying capacity was found. Allowable load-carrying capacity of the dovetail connection was estimated using the stochastic finite element method associated with allowable stress design and load resistance factor design concepts.
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