Location

La Jolla, CA

Start Date

1-1-1991 12:00 AM

Description

Shearography is a new NDT technology that has evolved from work in the 1960s and 70s in the area of laser holography. Sensitive to submicroscopic deformations in the surface of a test object, shearography produces a video image of surface strain within a sensitivity typically on the order of 0.1 microstrain. Holography suffers from several inherent technical problems such as the requirements for high resolution film, isolation from environmental vibration as well as an image that requires experienced operators to interpret. Shearography has been quickly accepted into the NDT community because it substantially overcomes these inherent problems. Advanced shearography provides a real time video image of the displacement derivative field covering the area on the test object being observed.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

10B

Chapter

Chapter 8: Instruments and Systems

Pages

2129-2133

DOI

10.1007/978-1-4615-3742-7_129

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Production and Field Inspection of Composite Aerospace Structures with Advanced Shearography

La Jolla, CA

Shearography is a new NDT technology that has evolved from work in the 1960s and 70s in the area of laser holography. Sensitive to submicroscopic deformations in the surface of a test object, shearography produces a video image of surface strain within a sensitivity typically on the order of 0.1 microstrain. Holography suffers from several inherent technical problems such as the requirements for high resolution film, isolation from environmental vibration as well as an image that requires experienced operators to interpret. Shearography has been quickly accepted into the NDT community because it substantially overcomes these inherent problems. Advanced shearography provides a real time video image of the displacement derivative field covering the area on the test object being observed.