Fatigue Crack Propagation Under Variable Amplitude Loading Analyses Based on Plastic Energy Approach
Journal Title: Materials Engineering - Materialove inzinierstvo (MEMI) - Year 2014, Vol 21, Issue 2
Abstract
Plasticity effects at the crack tip had been recognized as “motor” of crack propagation, the growth of cracks is related to the existence of a crack tip plastic zone, whose formation and intensification is accompanied by energy dissipation. In the actual state of knowledge fatigue crack propagation is modeled using crack closure concept. The fatigue crack growth behavior under constant amplitude and variable amplitude loading of the aluminum alloy 2024 T351 are analyzed using in terms energy parameters. In the case of VAL (variable amplitude loading) tests, the evolution of the hysteretic energy dissipated per block is shown similar with that observed under constant amplitude loading. A linear relationship between the crack growth rate and the hysteretic energy dissipated per block is obtained at high growth rates. For lower growth rates values, the relationship between crack growth rate and hysteretic energy dissipated per block can represented by a power law. In this paper, an analysis of fatigue crack propagation under variable amplitude loading based on energetic approach is proposed.
Authors and Affiliations
Sofiane Maachou, Mohamed Benguediab, Narayanaswami Ranganathan
Keywords
Related Articles
- EP ID EP163529
- DOI -
- Views 107
- Downloads 0
CORROSION OF COPPER PIPES JOINTS IN SIMULATED OPERATING CONDITIONS
Joining of copper pipes used for liquid media transport are made as demountable and fixation joints. This work deals with corrosion behavior of the joints made by soft soldering, hard soldering and fitting. Corrosion pro...
The impact of welding wire on the mechanical properties of welded joints
This paper presents results of the mechanical properties of Hardox 450 steel welded joints. These welded joints were made in accordance with welding procedure specifications (WPS), which was prepared and applied in the...
INTERNAL FRICTION USE IN MONITORING THE DEGRADATION PROCESSES IN A MATERIAL
During the measurement of the fatigue life of material, the specimen undergoes large number of stress cycles. While the observed number of cycles before failure is considered to be the most important result (often the on...
34CrMo4 steel resistance against the SSC after controlled cooling process
The sulphide stress cracking corrosion resistance of 34CrMo4 steel after the accelerated cooling process under the Ar3 temperature was investigated. Two modes of heat treatment were applied to achieve homogeneous microst...
PITTING CORROSION OF STAINLESS STEEL AT THE VARIOUS SURFACE TREATMENT
The stainless steel surface treatment is very important with regard to its pitting corrosion susceptibility. An effect of various types surfacing on pitting corrosion resistance of AISI 304stainless steel is investigated...