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Short fatigue cracks in notched/unnotched specimens under non-proportional loading

Hertel, Olaf and Döring, Ralph and Hoffmeyer, Jens and Seeger, Timm and Vormwald, Michael (2006):
Short fatigue cracks in notched/unnotched specimens under non-proportional loading.
In: Proc. Fracture of Nano and Engineering Materials and Structures ECF 16, In: ISBN 1-402049-714, [Conference or Workshop Item]

Abstract

A short crack growth model for the prediction of constant amplitude fatigue life to technical crack initiation under multiaxial nonproportional loading has been proposed by Döring et. al. [1, 2]. Here, results of further work are presented which are intended to improve the model and extend its applicability to notched components. A satisfying accuracy of calculated fatigue lives is achieved. This is verified by experimental data (Hoffmeyer et. al. [3, 4]) for shouldered shafts and hollow tube specimen made of fine grained steel S460N under a variety of multiaxial non-proportional loading sequences. The correlation between the perception as stated in the model and real damage evolution is shown comparing calculated and experimentally determined short crack growth curves measured with a replica technique. The accuracy of the short crack model is comparable to conventional multiaxial damage parameters. However the short crack model offers the opportunity for further developments, especially for variable amplitude loading.

Item Type: Conference or Workshop Item
Erschienen: 2006
Creators: Hertel, Olaf and Döring, Ralph and Hoffmeyer, Jens and Seeger, Timm and Vormwald, Michael
Title: Short fatigue cracks in notched/unnotched specimens under non-proportional loading
Language: English
Abstract:

A short crack growth model for the prediction of constant amplitude fatigue life to technical crack initiation under multiaxial nonproportional loading has been proposed by Döring et. al. [1, 2]. Here, results of further work are presented which are intended to improve the model and extend its applicability to notched components. A satisfying accuracy of calculated fatigue lives is achieved. This is verified by experimental data (Hoffmeyer et. al. [3, 4]) for shouldered shafts and hollow tube specimen made of fine grained steel S460N under a variety of multiaxial non-proportional loading sequences. The correlation between the perception as stated in the model and real damage evolution is shown comparing calculated and experimentally determined short crack growth curves measured with a replica technique. The accuracy of the short crack model is comparable to conventional multiaxial damage parameters. However the short crack model offers the opportunity for further developments, especially for variable amplitude loading.

Title of Book: Proc. Fracture of Nano and Engineering Materials and Structures ECF 16
Series Name: ISBN 1-402049-714
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Steel Constructions and Material Mechanics > Fachgebiet Werkstoffmechanik
13 Department of Civil and Environmental Engineering Sciences > Institute of Steel Constructions and Material Mechanics
13 Department of Civil and Environmental Engineering Sciences
Date Deposited: 02 Feb 2015 12:39
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