1. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. © TOWARDS A CANONICAL ELASTOPLASTIC DAMAGE MODEL TAHER, SEF; BALUCH, MH; ALGADHIB, AH PERGAMON-ELSEVIER SCIENCE LTD, ENGINEERING FRACTURE MECHANICS; pp: 151-166; Vol: 48 King Fahd University of Petroleum & Minerals http://www.kfupm.edu.sa Summary Fundamental aspects of elastoplastic damage are outlined. Time-independent isotropic damage is considered in order to study material degradation. By splitting the total strain tensor into its components of elastic damage and plastic damage and using recoverable energy equivalence, three distinct modes of behavior are particularized. For each mode of behavior, a suitable damage variable is culled. An in-depth analysis of this formulation reveals a certain incongruity in the assumptions postulated in some of the previously proposed models. The suggested generalized concepts are supported by experimental evidence. References: BAZANT ZP, 1979, J ENG MECH DIV ASCE, V105, P407 BAZANT ZP, 1980, J ENG MECHANICS DIVI, V106, P929 BAZANT ZP, 1991, J ENG MECH-ASCE, V117, P2609 CHABOCHE JL, 1987, NUMERICAL METHODS FR, P309 CHOW CL, 1987, DEC P ASME WINT ANN, P1 CHOW CL, 1987, ENG FRACT MECH, V27, P547 CORDEBOIS JP, 1982, J MECANIQUE THEOR AP DAFALIAS YF, 1977, INT J NONLINEAR MECH, V12, P327 DAFALIAS YF, 1977, INT J SOLIDS STRUCT, V13, P239 DAFALIAS YF, 1978, PVPPB028 ASME SER, P29 DAFALIAS YF, 1981, P IUTAM C PHYSICAL N DRAGON A, 1979, INT J ENG SCI, V17, P121 DRAGON A, 1985, ENG FRACT MECH, V21, P875 DRAGON A, 1985, MECH MATER, V4, P95 ELICES M, 1989, FRACTURE MECH CONCRE, P16 FRANTZISKONIS G, 1986, THESIS U ARIZONA TUC FRANTZISKONIS G, 1987, INT J SOLIDS STRUCT, V23, P733 Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa

2. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. © HASHIGUCHI K, 1989, INT J SOLIDS STRUCT, V25, P917 HSU TC, 1963, J AM CONCRETE I, V60, P227 HUECKEL T, 1975, B POLISH ACAD SCI SE, V23, P405 HUECKEL T, 1976, MECCANICA J ITAL ASS, V11, P227 JANSON J, 1977, J MEC APPL, V1, P69 JU JW, 1989, INT J SOLIDS STRUCT, V25, P803 KACHANOV LM, 1958, IZV AKAD NAUK USS TN, V8, P26 KARSAN ID, 1969, J STRUCT DIV ASCE, V95, P2543 KRAJCINOVIC D, 1984, APPLICATION FRACTURE, P453 LADEVEZE P, 1983, P CNRS INT C FAILURE LEMAITRE J, 1977, 3EME C FRANC MEC GRE LEMAITRE J, 1985, COMPUT METHOD APPL M, V51, P31 LEMAITRE J, 1985, J ENG MATER-T ASME, V107, P83 LEMAITRE J, 1986, 10TH P US NAT C APPL LEMAITRE J, 1992, COURSE DAMAGE MECHAN LOLAND KE, 1981, THESIS U TRONDHEIM N LORRAIN M, 1983, FRACTURE MECHANICS C, P341 MAZARS J, 1980, P ICM KYOTO MAZARS J, 1982, ADV FRACTURE RES, V4, P1499 MAZARS J, 1984, APPL FRACTURE MECH C, P375 MAZARS J, 1984, THESIS U PARIS FRANC MAZARS J, 1986, 10TH P US NAT C APPL, P135 ORTIZ M, 1985, MECH MATER, V4, P67 OWEN DRJ, 1983, COMPUT METHOD APPL M, V41, P323 POPOVICS S, 1973, CEMENT CONCRETE RES, V3, P583 RABOTNOV YN, 1988, 12 P INT C APPL MATH RAMBERG W, 1943, NASA TN902 READ HE, 1984, MECH MATER, V3, P271 RESENDE L, 1984, COMPUT METHOD APPL M, V42, P1 RESENDE L, 1987, COMPUT METHOD APPL M, V60, P57 ROELFSTRA PE, 1989, CRACKING DAMAGE STRA, P539 SANDLER JS, 1984, DEC ASME WINT ANN M SAOURIDIS C, 1989, CRACKING DAMAGE STRA, P391 SCHREYER HL, 1989, CRACKING DAMAGE STRA SIMO JC, 1987, INT J SOLIDS STRUCT, V23, P821 SIMO JC, 1987, INT J SOLIDS STRUCT, V23, P841 SIMO JC, 1989, CRACKING DAMAGE STRA, P440 SPOONER DC, 1975, MAG CONCRETE RES, V27, P151 SPOONER DC, 1975, MAG CONCRETE RES, V27, P92 STEVENS DJ, 1989, J STRUCT ENG-ASCE, V115, P2329 TALREJA R, 1985, P ROY SOC LOND A MAT, V399, P195 VANMIER JGM, 1984, THESIS EINDHOVEN U T WASTIELS J, 1979, CEMENT CONCRETE RES, V9, P35 WU FH, 1984, J MECH PHYS SOLIDS, V32, P119 YAZDANI S, 1990, J ENG MECH-ASCE, V116, P1435 Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa

3. © For pre-prints please write to: abstracts@kfupm.edu.sa Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa