Modelling considerations for stress intensity factor solutions at pin‐loaded holes

Abstract

This work summarizes investigations into stress intensity factor solutions for straight, through cracks at pin‐loaded holes in thin sheets. As shown in this work, several assumptions contribute to the fidelity of a stress intensity factor solution that includes the distribution of contact pressure on the pin‐hole interface, the friction coefficient at the pin‐hole interface, the crack initiation angle, and stiffness mismatch. These assumptions lead to higher or lower stress intensity factor solutions as demonstrated by results generated from advanced finite element analyses of the relevant geometries. Results shown here contribute to the development of a realistic and conservative set of assumptions for stress intensity factor solutions. Conclusions drawn from this work are applicable to cracks originating at pin‐loaded holes in plates and lugs.

Weight function analyses and stress intensity factors for corner/surface crack in straight and tapered lugs

“…The interaction between lug and pin is complicated, and stress distribution near the hole boundary varies nonlinearly as crack propagate. [3][4][5] In this paper, the reference SIF and COD are obtained under pin load. The contact condition of the two parts is considered in the derivation of 2D WF in Section 2.…”

“…3,4 However, the accuracy and efficiency of the SIF solutions are highly dependent on the underlying assumption used by the analyst. 5 Effective methods for determination of the SIFs of pin-loaded lugs are highly needed.…”

Thermomechanical analysis of riveted carbon fiber laminates for aerospace applications

“…Nevertheless, its complexity, stress field around a pin-loaded hole has been largely studied considering the effect of friction, clearance, contact, and geometrical parameters. [4][5][6][7][8][9][10][11][12] Static behavior of mechanically fastened joints could be well determined through an experimental test campaign following, for example, ASTM standards. 13,14 The application of a fatigue load changes significantly this behavior.…”

“…Useful review papers 1–3 introduce the reader to a better comprehension of the phenomena involved in determining mechanical behavior of fastened joints. Nevertheless, its complexity, stress field around a pin‐loaded hole has been largely studied considering the effect of friction, clearance, contact, and geometrical parameters 4–12 . Static behavior of mechanically fastened joints could be well determined through an experimental test campaign following, for example, ASTM standards 13,14 .…”