Cracks faster than the shear wave speed

Science

Volumn 284, Issue 5418, 1999, Pages 1337-1340

  Rosakis, A J ^a   Samudrala, O ^a   Coker, D ^a  

^a CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CRACK PROPAGATION; ELASTICITY; POLYESTERS; SHEAR STRESS; SURFACE WAVES;

SHEAR CRACKS;

FRACTURE MECHANICS;

CRACK PROPAGATION; S-WAVE; VELOCITY;

ARTICLE; EARTHQUAKE; PRIORITY JOURNAL; SHEAR STRESS; SHOCK WAVE; STRESS STRAIN RELATIONSHIP; VELOCITY;

EID: 0033591368     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.284.5418.1337     Document Type: Article

References (30)

1. L. B. Freund, Dynamic Fracture Mechanics (Cambridge Univ. Press, Cambridge, 1990).
2. B. Cotterell, Appl. Mat. Res. 4, 227 (1965).
3. K. Ravichandar and W. G. Knauss, Int. J. Fract. 26, 141 (1984).
4. K. B. Broberg, J. Appl. Mech. 31, 546 (1964).
5. H. Gao, J. Mech. Phys. Solids 1, 457 (1993).
6. P. D. Washabaugh and W. G. Knauss, Int. J. Fract. 65, 97 (1994).
7. S. Winkler, D. A. Shockey, D. R. Curran, ibid. 6, 151 (1970).
8. R. J. Archuleta, Bull. Seismol. Soc. Am. 70, 671 (1980).
9. K. B. Olsen, R. Madariaga, R. J. Archuleta, Science 278, 834 (1997).
10. D. J. Andrews, J. Geophys. Res. 81, 3575 (1976).
11. R. Burridge, G. Conn, L. B. Freund, ibid. 84, 2210 (1979).
12. K. B. Broberg, Int. J. Fract. 39, 1 (1989).
13. L. B. Freund, J. Geophys. Res. 84, 2199 (1979).
14. K. B. Broberg, Geophys. J. Int. 119, 706 (1994).
15. _, Arch. Mech. 47, 859 (1995).
16. 2 are the principal stresses, and n is the isochromatic fringe order.
17. J. R. Rice, in Physics of the Earth's Interior, A. M. Dziewonski and E. Boschi, Eds. (North-Holland, Amsterdam, 1980), pp. 555-649.
18. R. Dmowska and J. R. Rice, in Continuum Theories in Solid Earth Physics, R. Teisseyre, Ed. (Elsevier, Amsterdam, 1986), pp. 187-255.
19. S. Das, Int. J. Fract. 27, 263 (1985).
20. H. Kanamori, D. L. Anderseo, T. H. Heaton, Science 279, 839 (1998).
21. S. Das and K. Aki, Geophys. J. R. Astron. Soc. 50, 643 (1977).
22. J. D. Eshelby, Proc. R. Soc. London Ser. A 62, 307 (1949).
23. J. Weertman, in Mathematical Theory of Dislocations, T. Mura, Ed. (American Society of Mechanical Engineers, New York, 1969), p. 178.
24. H. Gao, Y. Huang, P. Gumbsch, A. J. Rosakis, J. Mech. Phys. Solids, in press.
25. P. Rosakis and H. Tsai, Int. J. Solids Struct. 32, 2711 (1995).
26. P. Gumbsch and H. Gao, Science 283, 965 (1999).
27. A. J. Rosakis, O. Samudrala, R. P. Singh, A. Shukla, J. Mech. Phys. Solids 46, 1789 (1998).
28. D. Coker and A. J. Rosakis, Caltech SM Report 98-16 (1998).
29. Homalite-100, at room temperature, is well modeled as a linearly elastic material that is representative of a class of materials that undergo brittle fracture. Of particular importance is its property of birefringence that permits the use of the optical technique of photoelasticity for stress field mapping. The shear strength of bulk Homalite-100 is about 42 MPa, and the shear strength of the bond was systematically varied from 30 to 50% of the strength of the bulk material. This shear bond strength was measured with the use of a conventional losipescu shear test fixture.
30. Supported by NSF grant CMS9813100 and Office of Naval Research grant N00014-95-0453. A.J.R. thanks J. R. Rice of Harvard University for penetrating discussions during his November 1998 visit to Harvard. Helpful comments by B. Broberg of the University of Lund are also gratefully acknowledged.