Claims
- 1. A fatigue analysis process for determining the amount of fatigue experienced by a structural member subject to cyclic loading comprising:
- affixing a continuous metal alloy film to a portion of a surface of said specimen, said film being selected from the group consisting of Ag.sub.50 Zn.sub.50, CuAu, Cu.sub.3 Au, Ag.sub.54 Zn.sub.46 and Ag.sub.50 Cd.sub.50, and having the property of undergoing a detectable color change upon experiencing sufficient cyclic stress; and
- observing said film to ascertain the extent of said color change.
- 2. A fatigue analysis process according to claim 1 further including the step of:
- detecting and quantitatively measuring said color change with a reflectometer.
- 3. A fatigue analysis process for determining the amount of fatigue experienced by a structural member subject to cyclic loading comprising:
- affixing a continuous metal alloy film to a portion of a surface of said specimen, said film being selected from the group consisting of Ag.sub.54 Zn.sub.46, Ag.sub.50 Zn.sub.50 and Ag.sub.50 Cd.sub.50, and having the property of undergoing a detectable color change upon experiencing sufficient cyclic stress; and
- observing said film to ascertain the extent of said color change.
- 4. A fatigue analysis process for determining the amount of fatigue experienced by a structural member subject to cyclic loading comprising:
- affixing a continuous metal alloy film to a portion of a surface of said specimen, said film being selected from the group consisting of CuAu and Cu.sub.3 Au, and having the property of undergoing a detectable color change upon experiencing sufficient cyclic stress; and
- observing said film to ascertain the extent of said color change.
- 5. A fatigue analysis process according to claim 4 further including the step of:
- detecting and quantitatively measuring said color change with a reflectometer.
STATEMENT OF GOVERNMENT INTEREST
The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
US Referenced Citations (3)