ASTM E08.04.01 Workshop Life Prediction Methodology and Validation for Surface Cracks Norfolk, Virginia May 23, 2007.

ASTM E08.04.01 Workshop

Life Prediction Methodology and Validation for Surface Cracks

Norfolk, Virginia

May 23, 2007

2

Goals

Develop validation procedures for surface cracks in monotonic and cyclic loading with regard to crack shape evolution, crack driving force, and fatigue life prediction.

Gather the basis for an ASTM guideline for software validation of analyses of surface cracks in monotonic or cyclic loading.

3

George Irwin on Surface Cracks

“In the examination of fracture failures one rarely finds that the initial starting crack extended completely through the thickness or that the starting-crack development, say by fatigue, occurred along a line extending completely through a cross section of a component. A part-through crack is more typical of the starting-crack shape customarily found.”Dec. 1962 J. Appl. Mech.

4

We Don’t Have X-Ray Vision…

…or do we?

5

Schedule—1:15-2:45PM

The Evolution and Application of Three-Dimensional Stress-Intensity Factors– J. C. (Jim) Newman, Jr., I. S. Raju, and S. A. Fawaz

A Framework for Investigating Crack Shape Evolution of Surface Cracks– Will Riddell

Surface Crack Testing of Welded Titanium Sheet According to ASTM E740– Dan Garcia

BREAK 2:45-3:15PM

6

Schedule—3:15-5:00PM

Crack Shape Evolution Studies with NASGRO 3.0– Elizabeth Watts and Chris Wilson

Comparison of Elastic-Plastic J Solutions for the Surface Crack– Chris Wilson and Eric Quillen

Investigations into Deformation Limits for SSY and LSY for the Surface Crack in Tension– Phillip Allen and Doug Wells

Closing Remarks 4:45-5:00PM

7

Closing Remarks

Task Group E08.04.01 Life Validation meets Monday AM of Committee Week

Contact me atChris Wilson

Dept. of Mechanical Engineering

Tennessee Tech University

931-372-3216

[email protected]

8

Why We Do What We Do…