1995 / Solid Freeform Fabrication Proceedings
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Author W. Steinchen, Universitat Gesamthochschule Kassel
Source Solid Freeform Fabrication Proceedings, 1995, pp 322-325
Abstract Shearography is a laser optical method which is suited for either nondestructive testing or for strain analysis. Contrary to holography which measures surface displacements, shearography measures derivatives of surface displacements. Since strains are functions of displacement derivatives, shearography allows strains to be determined without numerical differentiating displacement data. Defects in object normally create strain concentrations; it is easier using shearography to correlate defects with strain anomalies rather than displacement anomalies applying holography. Furthermore, rigid body motions do not produce strain, thus shearography is insensitive against such motions and does not need adopting any particular device for vibration isolation. It is an industrial tool suited very well for the following areas: 1. strain measurement and strain analysis 2. nondestructive testing and quality assurance system 3. optimization of machine parts and structures of any material (Auth abstract) [No References]
Solid Freeform Fabrication Proceedings can be obtained from: The Solid Freeform Fabrication Symposium
or contact:
The University of Texas at Austin
Laboratory for Freeform Fabrication / Texas Materials Institute
Mechanical Engineering Dept.
c/o The Solid Freeform Fabrication Symposium
MC C2200
Austin, TX 78712-1063 USA
512-471-3026; 512-471-7681 FX; Email: sffsymp@uts.cc.utexas.edu