Premium
Nondestructive testing of plastics by means of holographic interferometry
Author(s) -
Grünewald K.,
Fritzsch W.,
Harnier A. v.,
Roth E.
Publication year - 1975
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760150104
Subject(s) - materials science , interferometry , holographic interferometry , shearography , ultimate tensile strength , nondestructive testing , bending , holography , composite material , deformation (meteorology) , electronic speckle pattern interferometry , glass fiber , optics , medicine , physics , radiology
Holographic interferometry was investigated as a method for nondestructive testing of flat sheets of glass‐fiber reinforced plastics. Initially, the deformation behavior of faultless sheets was examined by means of holographic interferometry. The interferograms which resulted from various loading conditions (i.e., tensile load, bending) were compared to results obtained mathematically. The interferograms of faultless sheets were then compared to those of defective laminates. By suitable loading of the smaples a range of laminate faults could be readily and qualitatively detected. The influence of these faults on the tensile strength was examined. Not only the mechanical loading of the laminates, but also an acoustic stimulation of the sheets proved suitable for interferometric detection of laminate faults.