caa a22 4500 465741231 CHVBK 20180323111809.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF00013215 doi (NATIONALLICENCE)springer-10.1007/BF00013215 Plastic zone formation around an arresting crack [Elektronische Daten] [R. Fields, R. de Wit] We have followed the evolution of strain near the tip of an arresting cleavage crack in a pressure vessel steel using a strain gage technique. The measurements were made using a linear array of strain gages located along the intended crack path and 0.65B (B is the specimen thickness) above this plane. the gages were read using instrumentation capable of resolving strain in time intervals of between 2 and 4 μs. The results were obtained in a thick plate, large enough that reflected elastic waves did not contribute significantly to the strain records or crack motion during the time interval of interest. To within the resolution of this technique, the gages did not detect plasticity near the rapidly propagating cleavage crack tip. At the instant of arrest, however, the strain gages detected a plastic zone which increased in intensity over a period of several milliseconds. We have interpreted this increasing intensity as an elastic-plastic boundary emanating from the arresting crack tip and eventually reaching an equilibrium size, i.e., that predicted from the applied stress intensity factor and the static plastic properties. A simple analysis is presented to estimate the velocity of this elastic-plastic boundary from the strain data and results are given for several experiments. Kluwer Academic Publishers, 1990 Fields R. National Bureau of Standards, 20899, Gaithersburg, MD, USA aut de Wit R. National Bureau of Standards, 20899, Gaithersburg, MD, USA aut International Journal of Fracture Kluwer Academic Publishers 42/3(1990-03-01), 231-238 0376-9429 42:3<231 1990 42 10704 https://doi.org/10.1007/BF00013215 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00013215 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fields R. National Bureau of Standards, 20899, Gaithersburg, MD, USA aut NATIONALLICENCE 700 1- de Wit R. National Bureau of Standards, 20899, Gaithersburg, MD, USA aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 42/3(1990-03-01), 231-238 0376-9429 42:3<231 1990 42 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer