Journal ArticleDOI
Microstructure and load sensitive fatigue crack nucleation in Ti-6242 using accelerated crystal plasticity FEM simulations
Somnath Ghosh,Pritam Chakraborty +1 more
TLDR
In this article, a wavelet transformation induced multi-time scaling (WATMUS) method is used to perform accelerated cyclic CPFE simulations till crack nucleation, which is otherwise infeasible using conventional time integration schemes.About:
This article is published in International Journal of Fatigue.The article was published on 2013-03-01. It has received 66 citations till now. The article focuses on the topics: Crack closure & Nucleation.read more
Citations
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Journal ArticleDOI
Failure of metals II: Fatigue
TL;DR: In this article, a multistage grain scale approach to microstructure-sensitive fatigue crack formation and growth is presented which uses Fatigue Indicator Parameters (FIPs) to correlate these processes.
Journal ArticleDOI
A crystal plasticity FE model for deformation with twin nucleation in magnesium alloys
Jiahao Cheng,Somnath Ghosh +1 more
TL;DR: In this paper, a physically-motivated non-local crystal plasticity finite element (CPFE) model is developed for dislocation-mediated heterogeneous deformation of single and polycrystalline Mg alloys leading to micro-twin nucleation.
Journal ArticleDOI
A stored energy criterion for fatigue crack nucleation in polycrystals
TL;DR: A series of microstructurally-differing, large-grained, notched, polycrystal BCC ferritic steel bend test samples have been analyzed to extract the experimentally observed sites of fatigue crack nucleation together with the number of cycles to cause crack formation.
Journal ArticleDOI
A comparative study on dwell fatigue of Ti-6Al-2Sn-4Zr-xMo (x= 2 to 6) alloys on a microstructure-normalized basis
TL;DR: In this paper, the dwell effects of Ti624x alloys, including dwell fatigue life debit, fracture mode and strain accumulation, were characterized and compared, and their relationship with the aid of a two-region redistribution model based on a previous two-element redistribution model was proposed by Bache.
Journal ArticleDOI
Mesoscale cyclic crystal plasticity with dislocation substructures
TL;DR: In this paper, a physically-based formulation for the back stress based on the Eshelby inclusion formalism is introduced that explicitly depends on morphology of mesoscale dislocation structures.
References
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Book
Fatigue of materials
TL;DR: In this article, the cyclic deformation and fatigue crack initiation in polycrystalline ductile solids was studied and a total-life approach was proposed to deal with the problem.
Journal ArticleDOI
Computational Design of Hierarchically Structured Materials
TL;DR: In this paper, numerical implementation of materials science principles provides a hierarchy of computational models defining subsystem design parameters that are integrated, through computational thermodynamics, in the comprehensive design of materials as interactive systems.
Journal ArticleDOI
Crystallographic texture evolution in bulk deformation processing of FCC metals
TL;DR: A Taylor-type polycrystalline model, together with a new fully-implicit timeintegration scheme has been developed and implemented in a finite element program to simulate the evolution of crystallographic texture during bulk deformation processing of face centered cubic metals deforming by crystallographic slip as mentioned in this paper.
Reference BookDOI
A Primer on Wavelets and Their Scientific Applications
TL;DR: Haar WaveletsThe Haar TransformConservation and Compaction of EnergyRemoving Noise from Audio SignalsHaarWaveletsMultiresolution AnalysisCompression of audio SignalsRemoving noise from AudiosignalsNotes and ReferencesDaubechies Wavelets