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188144

The Application of Linear Elastic Fracture Mechanics Analysis to Bluntly Notched Round Bar Specimens.

Article

Last updated: 04 Jan 2025

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Subjects

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Tags

Mechanical Power Engineering

Abstract

A technique has been presented which allows the use of small notched round-bar specimens without fallgue pre-cracking for the determination of the plane strain fracture toughness of engineering materials. The technique is based on the linear elastic fracture mechanics analysis and the principle of stress concentration factors at the tip of the notch. The error inherent in the fracture toughness calculations, i.e. due to the absence of very sharp crack, can be corrected from an error correction factor which is a function of the normalized notch-tip radius, r/d.
The technique has been applied to two metallic alloys (bronze and steel) and the plane strain fracture toughness for the two materials were obtained. Small round-bar specimens having V-notches with different angles and tip-radii have been tested in tension. A comparison of the KIc values calculated using the present technique and those calculated in the literature indicated reasonable agreement with a difference between the two values ranging from 0 to ±5 %. It is recommended that the normalized notch-tip ratio, r/d, should not exceed about 0.14 for this difference to stay within acceptable limits.
The present technique may be considered relatively fast and economic and indicating a level of accuracy adequate for many practical purposes.

DOI

10.21608/bfemu.2021.188144

Authors

First Name

Mohamed

Last Name

Shabara

MiddleName

Ahmed Nasr

Affiliation

Associate Professor., Production and Mechanical Design Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

Volume

16

Article Issue

2

Related Issue

27058

Issue Date

1991-12-01

Receive Date

1991-10-10

Publish Date

2021-08-08

Page Start

31

Page End

41

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 16_Issue 2_Pages 31-41.pdf

PDF . 556.1kB

Link

https://bfemu.journals.ekb.eg/article_188144.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=188144

Order

19

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

The Application of Linear Elastic Fracture Mechanics Analysis to Bluntly Notched Round Bar Specimens.

Details

Type

Article

Created At

22 Jan 2023