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Publications
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SAE Fatigue Design and Evaluation Committee Meeting
Structural Analysis Division
Unconfirmed Minutes
Dublin, Ohio
October 8, 1996
email from John Hakala
Approval of April Structural Analysis Division minutes
The April Structural Analysis Division Minutes were approved as written.
A Review of Fatigue Crack Growth Rate Equations, (20 min.) Ed Lu, Allied
Signal
Ed reviewed fatigue crack growth assumptions, equations and resulted from
three crack growth simulation codes: FLAGRO, FASTRAN, and MSC/FATIGUE.
Analysis of Creep in Notches, ( 30 min.) Greg Glinka, Un. of Waterloo
Professor Glinka described a method to calculate thermal creep effects at the
tip of a notch using strain energy density estimated from a linear elastic
finite element solution. The solution was compared to an elastic plastic
finite element solution.
Planning Session - Wednesday, October 9, 1996 - 1:30 p.m.
Attending: Zhengxian Bai, Jerry Green, John Hakala, Ed Lu, Jay Ludlow, and
Gary Smith.
The following are possible topics for presentation and discussion at the
October
1996 meeting:
- Crack Growth Software:
Jerry Green and Jin Qian at John Deere are evaluating PUNCH FEA software.
Gary Smith is interested in participating in round robin evaluations, and
developing rule of thumb calculations. Gary also mentioned a Lockheed study on
effects of press fits on crack growth including a test program and a Wright
Patterson crack growth code application LUGRO. Ed Lu also expressed interest
in that study.
- Thermo-Mechanical Fatigue
Jia-Yi Luo expressed interest exploring Huseyin Sehitoglus methods and
applications.
Gary Smith was interested in applying Glinkas Creep calculations and comparing
to existing test failure data, possibly gas turbine applications.
- Shaft Models
Jay Ludlow expressed interest in modeling difficult shaft end conditions, for
example transverse holes, relative to Steve Tiptons work.
- Residual Stress of Welds
Rich Rice expressed interest in a NASA Marshall study on the residual stress of
welds on commercial aircraft using Pinshagha polygons.
Please call me if you have any other specific presentation topics for our
March, 1997 meeting at the University of Iowa.
John M. Hakala
(810) 236-6120
fax: 810-234-3405
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