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A Review of Chevron-notched Fracture Specimens

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 58

Book Description

A Review of Chevron-notched Fracture Specimens

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 58

Book Description

A Review of Chevron-Notched Fracture Specimens

Author: JC. Newman
Publisher:
ISBN:
Category : Boundary-element method
Languages : en
Pages : 27

Book Description
This paper reviews the historical development of chevron-notched fracture specimens; it also compares stress-intensity factors and load line displacement solutions that have been proposed for some of these specimens. The review covers the original bend-bar configurations up to the present day short-rod and bar specimens. In particular, the results of a recent analytical round robin that was conducted by an ASTM Task Group on Chevron-Notched Specimens are presented.

Chevron-notch Fracture Test Experience

Author: Kevin R. Brown
Publisher: ASTM International
ISBN: 080311480X
Category : Fracture mechanics
Languages : en
Pages : 200

Book Description
Reviews the latest information and experimentation on the fracture-toughness testing of materials using specimens that are chevron notched, a procedure that has been an ASTM standard only since December 1989. The 13 papers were presented at a symposium in Indianapolis, May 1991; they include studies

Three-dimensional Finite-element Analysis of Chevron-notched Fracture Specimens

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 38

Book Description

Three-Dimensional Finite-Element Analysis of Chevron-Notched Fracture Specimens

Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725622586
Category :
Languages : en
Pages : 34

Book Description
Stress-intensity factors and load-line displacements were calculated for chevron-notched bar and rod fracture specimens using a three-dimensional finite-element analysis. Both specimens were subjected to simulated wedge loading (either uniform applied displacement or uniform applied load). The chevron-notch sides and crack front were assumed to be straight. Crack-length-to-specimen width ratios (a/w) ranged from 0.4 to 0.7. The width-to-thickness ratio (w/B) was 1.45 or 2. The bar specimens had a height-to-width ratio of 0.435 or 0.5. Finite-element models were composed of singularity elements around the crack front and 8-noded isoparametric elements elsewhere. The models had about 11,000 degrees of freedom. Stress-intensity factors were calculated by using a nodal-force method for distribution along the crack front and by using a compliance method for average values. The stress intensity factors and load-line displacements are presented and compared with experimental solutions from the literature. The stress intensity factors and load-line displacements were about 2.5 and 5 percent lower than the reported experimental values, respectively. Raju, I. S. and Newman, J. C., Jr. Langley Research Center NASA-TM-85798, NAS 1.15:85798 RTOP 505-33-23-02...