A low constraint center cracked Brazilian disk specimen for ductile FCC single crystal

Deka, Nipal; Jonnalagadda, Krishna

doi:10.1007/s10704-021-00570-7

Cited by 1 publication

(1 citation statement)

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“…The SENB sample under TPB loading is a low positive constraint geometry, and by varying

a false/ W

and

L false/ W

ratios level of constraint can be altered 29 . The magnitude of normalized

T

‐stress for this particular geometry was calculated using the stress difference method (SDM) for the anisotropic aluminum single crystal 30 and found out to be

\approx

0.2.…”

Section: Methodsmentioning

confidence: 99%

Localized strain evolution and accumulation at the notch tip of an aluminum single crystal under cyclic loading

Deka

Singh

Jonnalagadda

2023

Fatigue Fract Eng Mat Struct

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A synchronized analysis of strain localization and slip system interaction, with full‐field strain mapping, in the vicinity of a notch tip in aluminum single crystal is presented. Progressive strain accumulation, prominently along one of the slip shear bands, was demonstrated quantitatively under cyclic loading, using digital image correlation. This dominant slip band potentially critical for the nucleation and growth of a crack. Also, triple slip active regions found on the surface indicate the participation of all three in‐plane slip systems. Therefore, the use of either diagonal or weakly coupled hardening rule is recommended even in aluminum single crystals, instead of the commonly used isotropic models. Finally, the results from this work provide quantitative data on the progressive strain accumulation and localization around a notch under cyclic loading that can be used in model validation for single and polycrystal plasticity.

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“…The SENB sample under TPB loading is a low positive constraint geometry, and by varying

a false/ W

and

L false/ W

ratios level of constraint can be altered 29 . The magnitude of normalized

T

‐stress for this particular geometry was calculated using the stress difference method (SDM) for the anisotropic aluminum single crystal 30 and found out to be