Effect of First Reflections in Dynamic Tear Test
Publication: Journal of Engineering Mechanics
Volume 116, Issue 6
Abstract
The dynamic tear (DT) test is often used to obtain key dynamic fracture parameters. Previous work indicates that the first impact waves arriving at the test specimen notch may not create a stress state critical for fracture. In this article, a finite element program for the transient dynamic simulation of an actual DT test is first compared with an analytical solution for the time interval prior to the arrival of wave reflections from the specimen surfaces. The program, which uses a uniform spatial mesh size and does not require singular elements, is then used to determine the transient notch stress field at any time. It is found that the arrival of the first reflected waves generate the stress field necessary for fracture. A critical dynamic stress intensity factor value for the DT test is then estimated. This estimate shows good agreement with other experimentally based results.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Achenbach, J. D. (1973). Wave propagation in elastic solids. North‐Holland, Amsterdam, Netherlands, 303–309.
2.
Broek, D. (1982). Elementary engineering fracture mechanics. Martinus Nijhoff, Boston, Mass., 330–338.
3.
Brock, L. M. (1986). “The transient field under a point force acting on an infinite strip.” J. Appl. Mech., ASME, 53(2), 321–325.
4.
Brock, L. M., Jolles, M., and Schroedl, M. (1985). “Dynamic impact over a subsurface crack: Applications to the dynamic tear test.” J. Appl. Mech., 52(2), 287–290.
5.
Brock, L. M., and Rossmanith, H. P. (1985). “Analysis of the reflection of point force‐induced crack surface waves by a crack edge.” J. Appl. Mech., ASME, 52(1), 57–61.
6.
Eringen, A. C. (1953). “Transverse impact on beams and plates.” J. Appl. Mech., ASME, 20(4), 461–468.
7.
Freund, L. B. (1974). “The stress intensity factor due to normal impact loading on the faces of a crack.” Int. J. Engrg. Sci., 12(2), 179–190.
8.
Hibbit, H. D., Karlsson, B. I., and Sorensen, E. (1984a). ABAQUS user's manual. Hibbit, Karlsson and Sorensen, Inc., Providence, R.I.
9.
Hibbit, H. D., Karlsson, B. I., and Sorensen, E. (1984b). ABAQUS theory manual. Hibbit, Karlsson and Sorensen, Inc., Providence, R.I.
10.
Kolsky, H. (1973). “Recent work on relations between stress pulses and fracture.” Dynamic crack propagation, G. C. Sih, ed., Noordhoff, Leyden, Netherlands, 399–414.
11.
Lamb, H. (1904). “On the propagation of tremors over the surface of an elastic solid.” Philosoph. Trans. Royal Soc., London, Series A, 203, 1–42.
12.
Lee, E. H. (1940). “Impact of a mass striking a beam.” Trans., ASME, 62, A129–A138.
13.
Mason, H. L. (1936). “Impact on beams.” Trans., ASME, 58, A55–A61.
14.
Miklowitz, J. (1982). “Wavefront analysis in the nonseparable elastodynamic quarter‐plane problems. Part 1: The general method.” J. Appl. Mech., ASME, 49(4), 797–807.
15.
Nakamura, T., Shih, C. F., and Freund, L. B. (1986). “Analysis of a dynamically loaded three‐point bend ductile fracture specimen.” Engrg. Fract. Mech., 25(3), 323–339.
16.
Nash, G. E., and Lange, E. A. (1969). “Mechanical aspects of the dynamic tear test.” J. Basic Engrg., ASME, 91(3), 535–543.
17.
Shockey, S. A., et al. (1983). “Simultaneous measurements of stress intensity and toughness for fast‐running cracks.” Exper. Mech., 23(2), 140–145.
18.
Sneddon, I. N., and Lowengrub, M. (1969). Crack problems in the classical theory of elasticity. John Wiley and Sons, New York, N.Y.
19.
Timoshenko, S. P. (1913). “Zur Frage nach der Wirkung eines Stoff auf einen Balken.” Zeitschrift für Mathematik und Physik, 62, 198–209 (in German).
20.
Zehnder, A. T., and Rosakis, A. J. (1986). “Dynamic fracture initiation and propagation in 4340 steel under impact loading.” SM Report 86‐6, Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, Calif.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 116 • Issue 6 • June 1990
Pages: 1276 - 1289
Copyright
Copyright © 1990 ASCE.
History
Published online: Jun 1, 1990
Published in print: Jun 1990
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.