To joint effect of temperature and notch root radius on fracture toughness

Title:

To joint effect of temperature and notch root radius on fracture toughness

Creator:

Elayachi, Ilyan, Pluvinage, Guy, Bensalah, Mohamed Omar, Lebienvenu, Michel, and Dlouhý, Ivo

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:90b43b7c-65ab-4163-b709-7b2fdea1f1bd
uuid:90b43b7c-65ab-4163-b709-7b2fdea1f1bd

Subject:

notch fracture mechanics, fracture toughness, notch effects, stress triaxility, cast ferritic steel, and transition behaviour

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

For low-alloyed cast ferritic steel simultaneous effect of temperature and notch root radius on fracture toughness has been investigated. Due to fact that fracture tests were performed on notched specimens (cylindrical tensile specimens with circumferential notch having there notch root radii), the concept of Notch Fracture Mechanics was applied. Volumetric fracture criterion with two parameters, effective stress and effective distance, was developed. The goal of the work was to quantify the influence of notch radius on transition temperature and notch fracture toughness, and, in addition, to present jointly the role of both these parameters in fracture behaviour. In the case of the studied cast steel with a low yield stress (375 MPa), effective distance is 3 to 4 times longer than the Creager's effective distance (half of notch radius). The transition region and temperatures are shifted to higher values when notch radius decreases. At temperature higher than a temperature called plateau temperature Tp dactile filure appears. The Tp temperature is sensitive to nothe radius being affected by stress triaxiality. It is possible to define a notch sensitivity compensated temperature T* = √ρ/ρc. In the transition regime, critical notch stress intensity factor varies linearly with T*. and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

11-22

Source:

Engineering mechanics: international journal for theoretical and applied mechanics | 2005 Volume:12 | Number:1

Harvested from:

CDK

Metadata only:

false