Abstract
A crack moving dynamically through a sheet of Polymethylmethacrylate at high average velocity is found in reality to propagate in a non-steady, periodic, and perhaps discontinuous fashion. The spatial period of the fracture process in the direction of travel, or banding morphology, is of millimeter size and is consistent both in magnitude and discontinuous nature with a crazing mechanism proposed in fatigue settings. The band size in both the dynamic and fatigue environments scales with the applied stress intensity. This commonality has importance in modeling. It suggests that a single mechanism is fundamental in both dynamic and fatigue loading regimes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
L.B. Freund, Journal of the Mechanics and Physics of Solids, Pt. I, 20, 129–140; Pt. II, 20, 141–152; Pt. III, 21, 47–61; Pt. IV, 22, 137–146 (1972–1974).
T. Kobayashi and J.W. Dally in Fast Fracture and Crack Arrest, ASTM STP 627 (1977) 257–273.
A.S. Kobayashi and S. Mall, Experimental Mechanics 18 (1978) 11–18.
K. Ravi-Chandar and W.G. Knauss, International Journal of Fracture, Pt. I, 25, 247–262; Pt. II, 26, 65–80; Pt. III, 26, 141–154; Pt. IV, 26, 189–200 (1984).
K. Ravi-Chandar, Ph.D. thesis, California Institute of Technology (1982) 100.
J.W. Dally, W.L. Fourney and G.R. Irwin, International Journal of Fracture 27 (1985) 159–168.
K. Takahashi and K. Arakawa, Experimental Mechanics (1987) 195–200.
C.C. Ma and L.B. Freund, Journal of Applied Mechanics 53 (1986) 303–310.
S. Krishnaswamy, Ph.D. thesis, California Institute of Technology (1989).
K. Ravi-Chandar and W.G. Knauss, Journal of Applied Mechanics 54 (1987) 72–77.
N. Vasudevan and W.G. Knauss, An approximate analysis of the effect of micro-fracture on the caustic of a dynamically moving crack tip, SM Report 86–10, Graduate Aeronautical Laboratories, California Institute of Technology (1986).
A. Shukla and J.W. Dally, Experimental Mechanics (1983) 298–303.
I. Wolock, J.A. Kies and S.B. Newman, in Fracture, Averbach et al. (eds.), Technology Press of MIT, Boston (1959).
J.A. Kies, A.M. Sullivan and G.R. Irwin, Journal of Applied Physics 21 (1950) 716–720.
B.Cotterell, Applied Materials Research (1965) 227–232.
A.K. Green and P.L. Pratt, Engineering Fracture Mechanics 6 (1974) 71–80.
G.C. Smith, Ph.D. thesis, Graduate Aeronautical Laboratories, California Institute of Technology (1975).
O.S. Lee and C. Hu, A database for high-speed crack propagation in PMMA-data only, SM Report 86–39, Graduate Aeronautical Laboratories, California Institute of Technology (1986).
R.D. Pfaff, Ph.D. thesis, Graduate Aeronautical Laboratories, California Institute of Technology (1990).
P.D. Washabaugh, Ph.D. thesis, California Institute of Technology (1990).
W. Doll and G.W. Weidmann, Journal of Material Science-Letters 11 (1976) 2348–2350.
R.W. Hertzberg, J.A. Manson and S. Kim, Journal of Material Science 12 (1976) 531.
R.W. Hertzberg, M.D. Skibo and J.A. Manson, Journal of Material Science 13 (1978) 1038.
R.P. Kambour, Journal of Polymer Science A2, 4 (1966) 349.
R.W. Hertzberg and J.A. Manson, Journal of Material Science 8 (1973) 1554.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Washabaugh, P., Knauss, W. Non-steady, periodic behavior in the dynamic fracture of PMMA. Int J Fract 59, 189–197 (1993). https://doi.org/10.1007/BF00012390
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00012390