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Modeling short crack propagation under variable structural and thermal loadings

Bosch, Alexander ; Vormwald, Michael (2023)
Modeling short crack propagation under variable structural and thermal loadings.
In: Fatigue & Fracture of Engineering Materials & Structures, 2021, 44 (6)
doi: 10.26083/tuprints-00021011
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Item Type: Article
Type of entry: Secondary publication
Title: Modeling short crack propagation under variable structural and thermal loadings
Language: English
Date: 11 December 2023
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Oxford
Publisher: Wiley-Blackwell
Journal or Publication Title: Fatigue & Fracture of Engineering Materials & Structures
Volume of the journal: 44
Issue Number: 6
DOI: 10.26083/tuprints-00021011
Corresponding Links:
Origin: Secondary publication DeepGreen

In the present work, a new concept for the prediction of fatigue life under variable structural and thermal loads is presented based on the modeling of short crack propagation by the effective cyclic J‐integral. Stresses in the range below the initial endurance limit up to plastic deformations can be considered. The development and validation of the concept is based on the large database of constant and variable amplitude loading tests for the austenitic stainless steel X6CrNiNb18‐10 (1.4550, AISI 347). Taking into account the influence of notches and welding process, tests were performed for specimens with different stress concentration factors and even with specimens of nonhomogeneous microstructure due to welding or its physical simulation (Gleeble). The input for the developed model is based on local stress–strain hysteresis in the order of their occurrence. This is the basis for considering load sequence effects; the new J‐based model considers several types of them. The model as well as the identification of the parameters will be presented in detail. Validation to experimental results is also shown against the background of common fatigue concepts. Basic aspects of the model are discussed.

Uncontrolled Keywords: crack propagation, J‐integral, short crack growth, thermomechanical fatigue
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-210118
Additional Information:

This article also appears in: Variable Amplitude Loading – Fracture Mechanics and Cumulative Damage Modelling

Classification DDC: 600 Technology, medicine, applied sciences > 624 Civil engineering and environmental protection engineering
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Steel Constructions and Material Mechanics > Fachgebiet Werkstoffmechanik
Date Deposited: 11 Dec 2023 13:47
Last Modified: 16 Feb 2024 11:19
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21011
PPN: 515589632
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