A modified cyclic crack propagation description. (September 2015)

• Record Type: Journal Article
• Authors: Dhondt, Guido; Rupp, Michael; Hackenberg, Hans-Peter
• Is Part Of: Engineering fracture mechanics. Volume 146(2015)
• Page Start: 21
• Page End: 30
• Publication Date: 2015-09
• Subjects: Crack propagation law -- R-dependence -- Walker -- HCF-cycles; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2015.07.020
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: A multiplicative crack propagation law is proposed including R -effects. The Walker law was extended to take HCF-cycles into account. More than 1000 tests were evaluated to check the new law. The law was applied to steel, Nickel and Titanium alloys. Abstract: A new form of the crack propagation law is presented for cyclic crack propagation calculations. It is characterized by a multiplicative juxtaposition of the Paris range, the threshold and critical limit and the R -dependence. The latter is covered by a modified Walker approach, in which the influence of small cycles at high R -ratios is appropriately adjusted. The concrete form of the R -dependence was validated by application to a wide range of materials.