Determination of Whole Field Residual Strain Measurement Using 3D-DSPI and Incremental Hole Drilling 2006-01-0764
An experimental setup utilizing 3D-Digital Speckle Pattern Interferometry (DSPI) 1,2 and Incremental hole drilling is being applied for the non-contact, fast and accurate determination of residual strain as a function of depth. From the measured phase maps using the DSPI technique we can determine the surface deformations in a whole field area around a drilled hole and thus relate these released strains to the residual strains existing in the material. Incremental hole drilling3,4 has been coupled with residual stress measurement to provide a means to estimate the residual stresses as a function of depth. Unlike the traditional holography with a manualevaluation5 in this case the system can quantitatively determine the deformation data in x, y and z directions for various depth increments and thus finally provides us with the residual strains as a function of depth. A 3D-DSPI unit coupled with a custom designed drilling system has been used in an experimental setup to study the residual strain distribution.
Citation: Samala, P., Wright, F., Yang, L., and Long, K., "Determination of Whole Field Residual Strain Measurement Using 3D-DSPI and Incremental Hole Drilling," SAE Technical Paper 2006-01-0764, 2006, https://doi.org/10.4271/2006-01-0764. Download Citation
Author(s):
Praveen R Samala, Forrest Wright, Lianxiang Yang, Kah Wah Long
Affiliated:
Oakland University, Daimler Chrysler Corporation
Pages: 7
Event:
SAE 2006 World Congress & Exhibition
Also in:
Experiments in Automotive Engineering - Experimental Test-SP-2033, SAE 2006 Transactions Journal of Materials and Manufacturing-V115-5