Analysis of impact energy to fracture un-notched charpy specimens made from railroad tank car steel

Yu, H.; Jeong, D.Y.; Gordon, J E; Tang, Y.H.; John A. Volpe National Transportation Systems Center (U.S.)

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

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Analysis of impact energy to fracture un-notched charpy specimens made from railroad tank car steel

2007-09-11
By Yu, H. ; Jeong, D.Y. ; Gordon, J E ; ...

English

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Details:

Alternative Title:

Proceedings of the 2007 ASME Rail Transportation Division Fall Technical Conference;RTDF2007;
Creators:

Yu, H. ; Jeong, D.Y. ; Gordon, J E ; Tang, Y.H.

Yu, H. ; Jeong, D.Y. ; Gordon, J E ; Tang, Y.H. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:

[+]

Deformation Failure Analysis Finite Element Method Fracture Tests Impact Tests Pendulum Tests Railroad Safety Structural Analysis Tank Cars
Publication/ Report Number:

RTDF2007-46038
Resource Type:

Proceedings
Geographical Coverage:

United States
NTL Classification:

NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION;NTL-RAIL TRANSPORTATION-Rail Safety;NTL-SAFETY AND SECURITY-Rail Safety;NTL-SAFETY AND SECURITY-Vehicle Design;
Abstract:

This paper describes a nonlinear finite element analysis

(FEA) framework that examines the impact energy to fracture

unnotched Charpy specimens by an oversized, nonstandard

pendulum impactor called the Bulk Fracture Charpy Machine

(BFCM). The specimens are made from railroad tank car steel,

have different thicknesses and interact with impact tups with

different sharpness. The FEA employs a Ramberg-Osgood

equation for plastic deformations. Progressive damage and

failure modeling is applied to predict initiation and evolution of

fracture and ultimate material failure. Two types of fracture

initiation criterion, i.e., the constant equivalent strain criterion

and the stress triaxiality dependent equivalent strain criterion,

are compared in material modeling. The impact energy needed

to fracture a BFCM specimen is calculated from the FEA.

Comparisons with the test data show that the FEA results

obtained using the stress triaxiality dependent fracture criterion

are in excellent agreement with the BFCM test data.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:f02dd563d16354044499f4e93286a8cdf525feea1530c3bc6fdb451a966b61ea
Download URL:

/view/dot/9907/dot_9907_DS1.pdf
File Type:

[PDF-439.91 KB]