Abstract:

Finite strain measurement is a major means to estimate quantity ductile deformation. Fry method, using deformed grains such as deformed gravels, oolites and rounded or sub-rounded crystals which can be easily identified in the field and labs as strain markers, is a commonly used means of finite strain measurement. The traditional process of this method is notoriously time-consuming, which prevents it from widely-using. Associated computer programs have been designed previously, but the related machine languages are already out of date. CorelDRAW is a widely-used drawing software, the updated version of which provides VBA for designing Macro-programs. This paper reports a macro-program on CorelDRAW platform, the Program FRY-1, for finite strain measurement of Fry method. This program will help us to rapidly obtain the value of R (long/short axes ratio) and the direction of the longer axle of strain ellipsoid with much higher precision. The efficiency and accuracy of this method are testified by comparing the result with that by the “neighbor center-to-center ” method.

Key words: Fry method, finite strain measurement, CorelDRAW, VBA, computer cartography, microstructure