Technical Paper
Methodology for Measuring Stress and Strain Fields in Connecting Rods Using Laser Interferometry (ESPI)
2011-10-04
2011-36-0323
The understanding of how mechanical stresses influence in the behavior of automotive components is of great interest to the automotive industry. The design of products must be made considering these efforts, always aiming to ensure smooth operation and no failures. To learn more about these efforts, a finite element simulation can be done. However, the results obtained from these simulations must be confirmed by carrying out physical experiments. Many methods are available to obtain the stress/strain fields of the object been tested, among which the best known and widespread is the use of strain-gauges. This technique requires a relatively long time of preparation as well as several measurements to obtain the full stress/strain field. The laser interferometry technique, on the other hand, reduces considerably the testing time to obtain the full stress/strain field, and no intervention on the object is required.