Topic
Stress concentration
About: Stress concentration is a research topic. Over the lifetime, 23250 publications have been published within this topic receiving 422911 citations.
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TL;DR: In this paper, the authors performed torsion fatigue tests on a quenched and tempered steel, commonly employed in highly stressed mechanical components, with different levels of superimposed mean shear stress.
104 citations
TL;DR: In this paper, a semi-infinite plate containing an edge crack is considered and a normal velocity is imposed on the boundary of the plate on one side of the edge crack.
Abstract: The two-dimensional elastodynamic problem of a semi-infinite plate containing an edge crack is considered. A normal velocity is suddenly imposed on the boundary of the plate on one side of the edge crack. A combination of transient mode I and mode II deformation fields is induced near the crack tip. The corresponding stress intensity factor histories are determined exactly by linear superposition of several more readily obtainable stress wave propagation solutions. The stress intensity factor histories are determined for the time interval from initial loading until the first wave scattered at the crack tip is reflected at the plate edge and returns to the crack tip
104 citations
TL;DR: In this article, a constitutive model is proposed to deal with a wide variety of joint distribution in rock masses, where the relative displacement across the joints is calculated from the joint stiffness and the stress concentration tensor which gives a relationship between the overall stress and the traction acting on the joint.
104 citations
TL;DR: In this article, the generalized stress intensity factors are evaluated directly from the scaled boundary finite-element solution for the singular stress field by following standard stress recovery procedures in the finite element method.
104 citations
TL;DR: In this article, the in-plane and out-of-plane constraint effects on crack tip stress fields under both small-scale and large-scale yielding conditions are studied by means of three-dimensional numerical analyses of boundary layer models and of finite size specimens, M(T) and SE(B), respectively.
Abstract: In-plane and out-of-plane constraint effects on crack tip stress fields under both small-scale and large-scale yielding conditions are studied by means of three-dimensional numerical analyses of boundary layer models and of finite size specimens, M(T) and SE(B), respectively. It is shown that the ratio of the plastic zone size over the panel thickness, rpt, plays a key role in formation of the crack-tip fields, particularly the outof-plane stress components. For a vanishingly small plastic zone around the crack tip the stress fields are dominated by the plane strain solution. With increase of the applied loads, i.e. increasing the plastic zone size, the stress fields develop towards the plane stress state. Characterization of “constraint effects” in terms of Q-stress is investigated. The “second term” in the near tip stress field, which is defined as the difference between the full three-dimensional stress fields and the plane strain reference solution, appears to depend on the distance to the tip and to the free surface of the specimen. Hence, the whole three-dimensional crack front fields cannot be correctly described by a two-parameter formulation as the load increases. However, a unique linear relationship between Q and the hydrostatic stress was found in all three-dimensional crack front fields.
104 citations