Stress intensity factor corner crack

Stress intensity factor, k, solutions for symmetric and unsymmetric corner cracks at a hole subject to general loading were determined using a hpversion of the. Stress intensity factors for different crack aspect ratios and pinhole sizes in different diameters of solid cylinder are presented. Mode i stress intensity factors for triangular corner. Mode i stress intensity factors for triangular corner crack nearby intersecting. The bars were subjected to remote tension, outofplane bending, or inplane bending loading, and the stress intensity factors were calculated from a threedimensional finite. The stress intensity factor, is used in fracture mechanics to predict the stress state stress intensity near the tip of a crack or notch caused by a remote load or residual stresses. Both quartercircular and tunnelled corner cracks have been considered. Values of the stress intensity factor k are raised along the crack front due to crack tunnelling, particularly for deep cracks. Improved mode i stress intensity factors for a large plate containing a single corner crack at a filled fastener hole are determined. Improved stress intensity factors for a single corner crack at a loaded. Stress intensity factors for corner cracks in single.

Accurate stress intensity factor solutions for corner. Stress intensity factor k and the elastic tstress for corner cracks. It is a theoretical construct usually applied to a homogeneous, linear elastic material and is useful for providing a failure criterion for brittle materials, and is a critical technique in the discipline of damage tolerance. Stress intensity factors of nozzle corner cracks chai guozhong and hong qichao zhejiang institute of technology, hangzhou, zhejiang, china abstractn the present paper a formula for the stress intensity factor sip of a nozzle corner 14 circular crack in a p. The elliptical hole becomes a crack by decreasing the minor axis b to zero. Accurate stressintensity factor solutions for these components are needed for reliable prediction of crackgrowth rates and fracture strengths.

Compilation of stress intensity factor and load limit solutions for the fitnet procedure. The stress intensity factor for cracks emanating from a notchtip, fig. The results show that the stress intensity factor k maintains a minimum value at the. This page provides stress intensity factor solutions for common cases.

As a result, the pressurized crack solution involving a thirdorder polynomial pressure distribution with limited use was extended to partelliptical problems. Stress intensity factor k solutions for unsymmetric corner cracks at a straight shank hole subject to tension, bending, and bearing have been calculated. Pdf stress intensity factors are presented for a wide range of quarterelliptical corner cracks in a rectangular bar. The improved alternating procedure is then used to determine stress intensity factors in corner flaws with aspect ratios of ab 0.

Stress intensity factor and load limit solutions for. Stress intensity factor, k, solutions for symmetric and unsymmetric corner cracks at a hole subject to general loading were determined using a hpversion of the finite element method fem in conjunction with a mathematical splitting scheme to enable efficient, accurate calculations. Stress intensity factors of a corner crack emanating from. Stressintensity factors for small surface and corner cracks in plates. Stress intensity factors are presented for a wide range of quarterelliptical corner cracks in a rectangular bar. Stress intensity factor equations for the evolution of surface and. Partthrough surface or corner 2d cracks are commonly found in structural components, even because practically all fatigue cracks tend to start. This paper presents stress intensity factors sifs and fatigue growth analyses of a corner crack emanating from a pinhole of a cylinder under cyclic tension. Stress intensity factor k and the elastic tstress for. On the other hand, the difference in the tstress near the free surfaces and at the midplane increases significantly with the increase of crack tunnelling. The bars were subjected to remote tension, outofplane bending, or inplane. Stress intensity factor, k, solutions for symmetric and unsymmetric corner cracks at a hole subject to general loading were determined using a hpversion of the finite element method fem in. Stress intensity factor of a corner crack astm international. Enetanya, stress intensity factor of a corner crack, in mechanics of crack growth, ed.