Energy description of fatigue crack growth process - theoretical and experimental approach

• Type: Article in International Conference Proceedings Book
• Date: 2017

Authors

Lesiuk, G (Author) Other; Szata, M (Author) Other; Rozumek, D (Author) Other; Marciniak, Z (Author) Other; Correia, JAFO (Author) FEUP; Abilio M P De Jesus (Author) FEUP

Conference proceedings International

Title: 2ND INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY, ICSI 2017

Pages: 904-911

2nd International Conference on Structural Integrity (ICSI)

Funchal, PORTUGAL, SEP 04-07, 2017

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00N-3T2

DOI: 10.1016/j.prostr.2017.07.128

Abstract (EN): The aim of the paper is the presentation of the energy methods in description of the fatigue crack growth rate (FCGR) process in structural steel components. In the literature and engineering practice, the Delta K approach is preferred in construction of the FCGR diagrams. One of the main disadvantages of force approach, is a mean stress effect, reflected in a well-known stress R-ratio effect on FCGR. The second disadvantage seems to be inconsistency in closure estimation with Delta K and description only in the linear elastic range. In this paper, two energy approaches are presented Delta H and Delta L The kinetic equations based on energy parameters, describe synonymously the kinetics of fatigue crack growth under uniaxial fatigue loading. It has been demonstrated, that the energy description based on dissipated strain energy density - Delta H is independent from R-ratio. All theoretical and numerical calculations based on Delta L, Delta H strain energy density parameters were compared with experimental results obtained for different type of alloys. (C) 2017 The Authors. Published by Elsevier B.V.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8