An equivalent stress parameter for multi-axial fatigue evaluation of welded components including non-proportional loading effects

Mei, Jifa; Dong, Ping

doi:10.1016/j.ijfatigue.2017.01.006

Cited by 52 publications

(30 citation statements)

References 42 publications

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“…It is particularly suited for dealing with ship structures in situations where coarse nite element meshes are highly desirable, particularly in early design stage. e treatment of multiaxial fatigue incorporating both proportional and nonproportional loading e ects including arbitrary variable amplitude loading is presented in [82][83][84]. Example of application of this method in Civil Engineering practice can be found in [85].…”

Section: Mesh-insensitive Structural Stress Methods and Master S-nmentioning

confidence: 99%

Review of Fatigue Assessment Methods for Welded Steel Structures

Fuštar

Lukačević

Dujmović

2018

Advances in Civil Engineering

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Due to high stress concentrations, welded joints represent the most common locations of fatigue crack initiation in steel structures that are prone to fatigue. Welding affects material properties by the process of heating, cooling, and combining basic and additional material. Since welding is the primary process of joining elements in steel structures, it is obvious that fatigue assessment during the design and maintenance process becomes inevitable. There are many fatigue assessment methods of welded joints, but their precision remains questionable. This paper represents a review of the most common fatigue assessment methods used for welded steel joints. As a result of this review, areas that require additional research are highlighted.

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Section: Mesh-insensitive Structural Stress Methods and Master S-nmentioning

confidence: 99%

Review of Fatigue Assessment Methods for Welded Steel Structures

Fuštar

Lukačević

Dujmović

2018

Advances in Civil Engineering

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“…In Equation (16), σ ′ is the deviatoric stress tensor. One of the main objectives of this work is to provide an efficient means to solve (k, b) satisfying Equations (9) to (15), which will be elaborated in Section 3. One of the main objectives of this work is to provide an efficient means to solve (k, b) satisfying Equations (9) to (15), which will be elaborated in Section 3.…”

Section: Plate Sectionmentioning

confidence: 99%

“…Such a hot spot stress definition seems not immune to mesh size sensitivity [eg, 1,8], in addition to its lack of a well-argued mechanics basis. 8 The method has been shown capable of correlating multiaxial test data 15 as well as some low-cycle fatigue test data 16 in piping components. 12,13 As for the mesh-insensitive traction structural stress method, it was formulated by imposing equilibrium conditions through a novel use of nodal forces and moments available from FE output 1 and shown to provide a consistent stress concentration characterization for differentiating effects of different joint types and loading conditions 1,8 on fatigue behaviours.…”

Section: Introductionmentioning

confidence: 99%

An analytically formulated structural strain method for fatigue evaluation of welded components incorporating nonlinear hardening effects

Pei

2018

Fatigue Fract Eng Mat Struct

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An analytically formulated structural strain method is presented for performing fatigue evaluation of welded components by incorporating nonlinear material hardening effects by means of a modified Ramberg‐Osgood power law hardening model. The modified Ramberg‐Osgood model enables a consistent partitioning of elastic and plastic strain increments during both loading and unloading. For supporting 2 major forms of welded structures in practice, the new method is applied for computing structural strain defined with respect to a through‐thickness section in plate structures and cross section in piping systems. In both cases, the structural strain is formulated as the linearly deformation gradient on their respective cross sections, consistent with the “plane sections remain plane” assumption in structural mechanics. The structural strain‐based fatigue parameter is proposed and has been shown effective in correlating some well‐known low‐cycle and high‐cycle fatigue test data, ranging from gusset‐to‐plate welded plate connections to pipe girth welds.

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“…For example, Mei et al [8] present an approach in which one characterizes the multiaxial loading cycle by computing a critical plane based on stress intensity factors of different modes. In [9] the same research group presents a case study applying their approach to welded plates. The paper of Gates and Fatemi [10] evaluates the methodology for, and effectiveness of, common equivalent stress-and strain-based fatigue life analysis approaches when applied to variable amplitude multiaxial service loading conditions.…”

Section: Introductionmentioning

confidence: 99%