Prediction of three-dimensional crack propagation paths taking high cycle fatigue into account
Journal Title: Frattura ed Integrità Strutturale - Year 2016, Vol 10, Issue 35
Abstract
Engine components are usually subject to complex loading patterns such as mixed-mode Low Cycle Fatigue Loading due to maneuvering. In practice, this LCF Loading has to be superimposed by High Cyclic Fatigue Loading caused by vibrations. The changes brought along by HCF are twofold: first, the vibrational cycles which are superposed on the LCF mission increase the maximum loading of the mission and may alter the principal stress planes. Secondly, the HCF cycles themselves have to be evaluated on their own, assuring that no crack propagation occurs. Indeed, the vibrational frequency is usually so high that propagation leads to immediate failure. In the present paper it is explained how these two effects can be taken care of in a standard LCF crack propagation procedure. The method is illustrated by applying the Finite Element based crack propagation software CRACKTRACER3D on an engine blade.
Authors and Affiliations
Guido Dhondt
Keywords
Related Articles
- EP ID EP159202
- DOI 10.3221/IGF-ESIS.35.13
- Views 41
- Downloads 0
Effect of fibre arrangement on the multiaxial fatigue of fibrous composites: a micromechanical computational model
Structural components made of fibre-reinforced materials are frequently used in engineering applications. Fibre-reinforced composites are multiphase materials, and complex mechanical phenomena take place at l...
The numerical simulation of ceramic composites failure at axial compression
On the basis of the developed model of quasibrittle medium the brittle and quasibrittle failure of composite ceramic materials with zirconium dioxide matrix and various percentage of hardening particles of corundum...
Un approccio innovativo per l’analisi quantitativa delle superfici di frattura a fatica nelle ghise sferoidali mediante elaborazione di immagini
Le osservazioni al microscopio elettronico a scansione (SEM) delle superfici di frattura ottenute a seguito di rotture per fatica consentono di evidenziare alcuni meccanismi di avanzamento che dipendono dal materia...
Extension of the CJP model to mixed mode I and mode II
The present authors have previously proposed a novel ‘plastic inclusion’ approach for dealing with the local plasticity which occurs at the tip of a growing fatigue crack. This meso-scale model provides a mod...
Critical plane approach to multiaxial variable amplitude fatigue loading
A new critical plane approach based on the modified Manson-Coffin curve method (MMCCM) is presented in this paper for predicting fatigue lifetime under variable amplitude (VA) multiaxial fatigue loading. The crit...