A finite strip loaded by a bonded-rivet of a different material

This paper investigates the maximum stress concentrations in a finite strip loaded by a bonded elastic rivet by using the complex variable method in c onjunction with the least-square boundary collocation method (BCM). The riv et-load is modeled by a uniform distributed body force; and the resultant r ivet-force is acting along the transverse direction. The accuracy of the BC M is checked by comparing the results to those of the finite element method for a specific finite geometry of a strip and by the exact solution for th e case of an infinite plane. Numerical results show that the maximum shear and hoop stresses at the interface decrease with increasing b/R, where b is half of the width of the strip and R is the radius of the rivet. The maxim um shear stress at the interface increases with zeta = mu(2)/mu(1) (where m u(1) and mu(2) are the shear moduli of the strip and rivet respectively) wh ile the maximum hoop stress decreases with zeta. For zeta greater than or e qual to 1, the maximum normal bond stress at the interface decreases initia lly to a local minimum before rising to a steady value as b/R further incre ases. As b/R increases, the angular location of maximum stress occurrence t heta(max), which is measured from the direction of resultant rivet-force, i ncreases from about 36 degrees similar to 42 degrees to 90 degrees (the inf inite plane limit) for the shear bond stress, and jumps suddenly from a rou ghly constant value (50 degrees similar to 55 degrees) to 0 degrees (the in finite plane limit) for the normal bond stress. Similar sudden shifts in th e angular location of maximum stress are also observed in the hoop stress a t the interface. (C) 1998 Elsevier Science Ltd. All rights reserved.