Publication

Round robin on local stress evaluation for fatigue by various FEM software

Alain Nussbaumer, Vasileios Grigoriou
2016
Conference Papers

Abstract

The objective of this Round Robin is to assess the software influence on the structural/local stress values as determined by means of various methods. In particular the influence of (a) FEM software solver, (b) potentially software-depending element characteristics (e.g. exact shape functions) and (c) software-depending post processing procedures (e.g. extrapolation from integration points and stress averaging methods. Two different typical problems are studied, one 2D geometry and one 3D geometry, using FE models with various element types and varying mesh finesse. For each of the models, the participants receive files with node coordinates and element numbering, in order to eliminate variations in mesh geometry. Results calculated by the Round Robin participants using various software are reported for structural/local stress values defined according to the following methods: hot-spot, Xiao and Yamada, Dong, Haibach, critical distance and equivalent notch stress. Eventually, these two problems could be proposed as benchmark examples for use by engineers how are not familiar with these methods in the validation of FE modeling procedures aiming at structural/local stress evaluation

Official source

https://infoscience.epfl.ch/entities/publication/5fffcc2c-fa06-4cdf-aaf8-dd5208291067

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Alain Nussbaumer, Vasileios Grigoriou
2016
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5fffcc2c-fa06-4cdf-aaf8-dd5208291067

About this result

Related concepts (27)

Stress–strain analysis

Stress–strain analysis (or stress analysis) is an engineering discipline that uses many methods to determine the stresses and strains in materials and structures subjected to forces. In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material. In simple terms we can define stress as the force of resistance per unit area, offered by a body against deformation.

Cauchy stress tensor

In continuum mechanics, the Cauchy stress tensor , true stress tensor, or simply called the stress tensor is a second order tensor named after Augustin-Louis Cauchy. The tensor consists of nine components that completely define the state of stress at a point inside a material in the deformed state, placement, or configuration. The tensor relates a unit-length direction vector e to the traction vector T(e) across an imaginary surface perpendicular to e: or, The SI units of both stress tensor and traction vector are N/m2, corresponding to the stress scalar.

Free software

Free software or libre software or libreware is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. Free software is a matter of liberty, not price; all users are legally free to do what they want with their copies of a free software (including profiting from them) regardless of how much is paid to obtain the program.

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