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Published November 1994 | metadata_only
Journal Article

Full Field Measurements of the Dynamic Deformation Field Around a Growing Adiabatic Shear Band at the Tip of a Dynamically Loaded Notch


The method of Coherent Gradient Sensing (CGS) is used to record the deformation field around an adiabatic shear band emanating from a pre-crack tip in C-300 steel loaded dynamically in mode II. At early times after impact, the resulting fringe pattern surrounding the shear band seems to exhibit the deformation characteristics of a mode II Dugdale plastic zone evolving under small-scale yielding conditions and, as a result, the experimental fringe patterns are fitted to the theoretical Dugdale crack deformation field by using a least squares fitting scheme. This results in values for the shear band length and the average shear stress acting on the shear band as functions of time. The shear band is observed to initiate when K^d_(11)(t) = 140 MPa√m and subsequently propagate with an average speed of 320 m s^(−1). The average shear stress on the shear band decreases from 1.6 GPa at initiation to 1.3 GPa during the later stages of propagation.

Additional Information

© 1994 Elsevier Science Ltd. Received 18 March 1994; in revised form 6 July 1994. The on-going support of the Army Research Office under grant no. DAAH04-93-G0037 and the support of the Office of Naval Research under grant no. N00014-90-J-1340 are greatly appreciated.

Additional details

August 20, 2023
August 20, 2023