Experimental and analytical study of cracks under biaxial fatigue
Journal Title: Frattura ed Integrità Strutturale - Year 2016, Vol 10, Issue 37
Abstract
Most mechanical components experience multi-axial cyclic loading conditions during service. Experimental analysis of fatigue cracks under such conditions is not easy and most works tend to focus more on the simpler but less realistic case of uni-axial loading. Consequently, there are many uncertainties related to the load sequence effect that are now well known and are not normally incorporated into the growth models. The current work presents a new methodology for evaluating overload effect in biaxial fatigue cracks. The methodology includes evaluation of mixed-mode (KI and KII) stress intensity factor and the Crack Opening Displacement for samples with and without overload cycle under biaxial loading. The methodology is tested under a range of crack lengths. All crack-tip information is obtained with a hybrid methodology that combines experimental full-field digital image correlation data and Williams' elastic model describing the crack-tip field.
Authors and Affiliations
M. Mokhtarishirazbad, P. Lopez-Crespo, B. Moreno, D. Camas, A. Lopez-Moreno
Keywords
Related Articles
- EP ID EP159491
- DOI 10.3221/IGF-ESIS37.16
- Views 48
- Downloads 0
Damages to stent stabilized left ventricular pacemaker electrodes during simulated lead extraction
During biventricular pacemaker implantation stents can be applied for coronary sinus lead stabilization to prevent lead dislocations. A lot of issues have been raised in connection with the use of the stent. In some case...
Analysis of the causes of failure in 5Cr-1Mo pipes mounted in a preheating furnace
The oxidation resistance of iron-based alloys depends on the formation of thin protective films consisting of reaction products between the alloys and the ambient atmosphere. The high corrosion resistance of Fe-Cr-...
Fracture-Safe and Fatigue-Reliable Structures
Learning from history is, by popular account, something at which human beings are not particularly good; George Bernard Shaw having stated that “we learn from history that we learn nothing from history”, while th...
Influence of vacuum carburizing treatment on fatigue crack growth characteristic in DSG2
The aim of this research is to clarify the influence of vacuum carburizing on the fatigue-crack progress characteristics of DSG2 steel. The test specimen tempering material (QT material) and vacuum carburizing...
Estimation of fatigue lifetime for selected metallic materials under multiaxial variable amplitude loading
This paper initially investigates the accuracy of two methods, i.e., the Maximum Variance Method (MVM) and the Maximum Damage Method (MDM), in predicting the orientation of the crack initiation plane in three...