### Abstract

In this paper, a new concept for rock mass involving distributed discontinuities in the body is proposed, so called the damage mechanics theory for rock mass. The effect of distributed discontinuities is characterized with a second-order symmetric tensor (the damage tensor), which was originally proposed by S. Murakami & N. Ohno in their creep damage theory for metal. The damage tensor is built in the system of a continuum mechanics theory, and plays a role of transformation operator for the Cauchy stress. Since the damage tensor is introduced as a field variable in addition to stress and strain, one may need one more field equation which governs the propagation of damage. We propose a form of the propagation equation. The theory is applied to a few typical problems and the results are compared with ones of other numerical schemes.

Original language | English |
---|---|

Title of host publication | Unknown Host Publication Title |

Editors | T. Kawamoto, Y. Ichikawa |

Publisher | A. A. Balkema |

Pages | 469-480 |

Number of pages | 12 |

Volume | 1 |

ISBN (Print) | 9061915813 |

Publication status | Published - 1985 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*Unknown Host Publication Title*(Vol. 1, pp. 469-480). A. A. Balkema.

**DAMAGE MECHANICS THEORY FOR DISCONTINUOUS ROCK MASS.** / Kyoya, T.; Ichikawa, Yasuaki; Kawamoto, T.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Unknown Host Publication Title.*vol. 1, A. A. Balkema, pp. 469-480.

}

TY - GEN

T1 - DAMAGE MECHANICS THEORY FOR DISCONTINUOUS ROCK MASS.

AU - Kyoya, T.

AU - Ichikawa, Yasuaki

AU - Kawamoto, T.

PY - 1985

Y1 - 1985

N2 - In this paper, a new concept for rock mass involving distributed discontinuities in the body is proposed, so called the damage mechanics theory for rock mass. The effect of distributed discontinuities is characterized with a second-order symmetric tensor (the damage tensor), which was originally proposed by S. Murakami & N. Ohno in their creep damage theory for metal. The damage tensor is built in the system of a continuum mechanics theory, and plays a role of transformation operator for the Cauchy stress. Since the damage tensor is introduced as a field variable in addition to stress and strain, one may need one more field equation which governs the propagation of damage. We propose a form of the propagation equation. The theory is applied to a few typical problems and the results are compared with ones of other numerical schemes.

AB - In this paper, a new concept for rock mass involving distributed discontinuities in the body is proposed, so called the damage mechanics theory for rock mass. The effect of distributed discontinuities is characterized with a second-order symmetric tensor (the damage tensor), which was originally proposed by S. Murakami & N. Ohno in their creep damage theory for metal. The damage tensor is built in the system of a continuum mechanics theory, and plays a role of transformation operator for the Cauchy stress. Since the damage tensor is introduced as a field variable in addition to stress and strain, one may need one more field equation which governs the propagation of damage. We propose a form of the propagation equation. The theory is applied to a few typical problems and the results are compared with ones of other numerical schemes.

UR - http://www.scopus.com/inward/record.url?scp=0022217962&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022217962&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0022217962

SN - 9061915813

VL - 1

SP - 469

EP - 480

BT - Unknown Host Publication Title

A2 - Kawamoto, T.

A2 - Ichikawa, Y.

PB - A. A. Balkema

ER -