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Analysis of Threaded Fasteners of a High Strength Steel: Role of Flaw Size and Orientation – A Numerical Study

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... In a previous study, it was found that the J-integral values of a crack front on a threaded fastener are highly reliant on geometric factors to include both flaw size and orientation [2]. In many situations for the case of complex components where low constraint geometry exists, the J-integral method begins to lose its validity once the region of large strain grows to a point where the HRR field can no longer be used to characterize the behavior within the plastic zone [3,4,5]. ...
... In Reakes, et al [2] the J-integral values for a threaded fastener were examined along various crack fronts and at multiple angular orientations, where the geometry of the crack was modeled as an elliptical crack having varying values of width (2a) and depth (b), (Figure 1). The Research of Reakes, et al. [2] is extended here by shifting focus to an evaluation of crack tip stresses. ...
... In Reakes, et al [2] the J-integral values for a threaded fastener were examined along various crack fronts and at multiple angular orientations, where the geometry of the crack was modeled as an elliptical crack having varying values of width (2a) and depth (b), (Figure 1). The Research of Reakes, et al. [2] is extended here by shifting focus to an evaluation of crack tip stresses. Readers are referred to Reakes, et al. [2] for detailed description of material properties and finite element models. ...
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