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Award Abstract #0825155

Collaborative Research: Multi-Scale Simulation of Low-Triaxiality Fracture and Ultra Low Cycle Fatigue in Steel Structures

NSF Org: CMMI
Div Of Civil, Mechanical, & Manufact Inn
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Initial Amendment Date: July 11, 2008
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Latest Amendment Date: July 11, 2008
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Award Number: 0825155
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Award Instrument: Standard Grant
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Program Manager: Y. Grace Hsuan
CMMI Div Of Civil, Mechanical, & Manufact Inn
ENG Directorate For Engineering
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Start Date: October 1, 2008
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End Date: September 30, 2012 (Estimated)
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Awarded Amount to Date: $112,124.00
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Investigator(s): Amit Kanvinde kanvinde@ucdavis.edu (Principal Investigator)
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Sponsor: University of California-Davis
OR/Sponsored Programs
Davis, CA 95618-6134 (530)754-7700
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NSF Program(s): STRUCTURAL MATERIALS AND MECH
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Program Reference Code(s): 025E, 036E, 1037, 1057, CVIS
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Program Element Code(s): 1635

ABSTRACT

Fracture or fatigue (i.e. cracking due to large and repeated loads) in steel structures often results in great damage to property as well as loss of life. Recently, structural fracture has been observed in the I-35 bridge collapse in Minneapolis and to over 100 buildings that experienced shaking in the 1994 Northridge Earthquake in the Los Angeles area. Motivated by these events, this project will develop improved methods to predict fracture in steel structures such as bridges, buildings, industrial facilities, or ships. The research focus will be on understanding a special type of ductile fracture that originates on the surfaces or corners of structures. The investigation will involve a program of laboratory testing and complementary finite element computer analysis to evaluate critical values of stresses and strains that cause surface fracture in structural steel. The project will culminate in the development of computational models that will enable engineers and scientists to accurately calculate and mitigate the risk of fracture in steel structures.

The models developed through this research will enable the design and construction of buildings, bridges and other structures that are safer and more fracture resistant. To disseminate and promote use of the research findings, the principal investigators will educate engineers through workshops, training courses and technical publications. In addition, the research project will form the basis of doctoral theses for two graduate students who, equipped with the advanced knowledge created during this research, will further develop and disseminate the research findings.


PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Myers, A.,T., Kanvinde, A., Deierlein, G.G.,. "Calibration of the Stress Modified Critical Strain (SMCS) criterion for ductile fracture in steels: specimen size dependence and parameter assessment," Journal of Engineering Mechanics, ASCE, v.136, 2011, p. 1401-1410.

BOOKS/ONE TIME PROCEEDING

Kanvinde AM, Deierlein GG, Smith
CM. "Earthquake Induced Ultra Low
Cycle Fatigue in steel
structures under low triaxiality", 10/01/2008-09/30/2009, "Proceedings of the 2009 NSF
Research and Innovation
Conference, Honolulu, HI."
,  2009, "Proceedings of the 2009 NSF
Research and Innovation".

Amit Kanvinde, Gregory Deierlein
and Christopher Smith,. "Earthquake Induced Ultra Low
Cycle Fatigue in steel
structures under low
triaxiality", 10/01/2009-09/30/2010, "Proceedings of the NSF CMMI
Research and Innovation
Conference 2009""
,  2009, "National Science Foundation,
Arlington, VA,".

Amit Kanvinde, Gregory Deierlein
and Christopher Smith,. "Earthquake Induced Ultra Low
Cycle Fatigue in steel
structures under low
triaxiality", 10/01/2010-09/30/2011, "Proceedings of the NSF CMMI
Research and Innovation
Conference 2009""
,  2009, "National Science Foundation,
Arlington, VA,".

Deierlein, G.G., Kanvinde, A.,
Myers, A., Fell, B.. "Ductile Fracture Initiation in
Steel Structures: Local Cyclic
Void Growth Criteria", 10/01/2010-09/30/2011, , Vigh, L.G."Proceedings: 6th European
Conference on Steel and
Composite Structures"
,  2011, "European Convention for
Constructional Steelwork".

 

Please report errors in award information by writing to: awardsearch@nsf.gov.

 

 

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