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On the basis of previous calibration tests, this paper describes the application of the ESPI method to determine the crack tip position and the strain field surrounding the crack that propagates in a specimen of clay material. The high sensitivity of the applied interferometric method in determining the displacements of one point produces results with an accuracy higher than with traditional techniques. For the clay specimens, the toughness parameters are obtained from a three-point bending test, and the interferometric techniques allow the determination of a complete map of displacements as a function of both time and crack propagation.

Additional information

Authors: BOSCO C, Politecnico di Torino (IT);CADONI F, JRC Ispra (IT);FACCHINI M, Loughborough University, Department of Mechanical Engineering (GB)
Bibliographic Reference: Paper presented: Photomechanics 95, Novosibirsk (RU), September 11-14, 1995
Availability: Available from (1) as Paper EN 39281 ORA
Record Number: 199511464 / Last updated on: 1995-11-03
Original language: en
Available languages: en