Publication detail

Role of Deterministic and Statistical Length Scales in Size Effect for Quasibrittle Failure at Crack Initiation

VOŘECHOVSKÝ, M., BAŽANT, Z., NOVÁK, D.

Original Title

Role of Deterministic and Statistical Length Scales in Size Effect for Quasibrittle Failure at Crack Initiation

Type

conference paper

Language

English

Original Abstract

An improved generalized law for combined energetic-probabilistic size effect on the nominal strength for structures failing by crack initiation from a smooth surface is used for practical purposes – the paper proposes a procedure to capture both deterministic and statistical size effects on the nominal strength of quasibrittle structures failing at crack initiation. The advantage of the proposed approach is that the necessity of time consuming statistical simulation is avoided, only deterministic nonlinear fracture mechanics FEM calculation must be performed. Results of deterministic nonlinear FEM calculation should follow deterministic-energetic formula, a superimposition with the Weibull size effect, which dominates for large sizes using the energetic-statistical formula, is possible. As the procedure does not require a numerical simulation of Monte Carlo type and uses only the results obtained by deterministic computation using any commercial FEM code (which can capture satisfactorily deterministic size effect), it can be a simple practical engineering tool.

Key words in English

size effect; quasibrittle materials and structures; extreme value statistics; Weibull statistics; characteristic lengths

Authors

VOŘECHOVSKÝ, M., BAŽANT, Z., NOVÁK, D.

RIV year

2005

Released

18. 6. 2005

Publisher

Millpress Rotterdam

Location

Netherlands

ISBN

90-5966-040-4

Book

Safety and Reliability of Engineering Systems and Structures

Pages from

73

Pages to

80

Pages count

8

BibTex

@inproceedings{BUT14798,
  author="Miroslav {Vořechovský} and Zdeněk P. {Bažant} and Drahomír {Novák}",
  title="Role of Deterministic and Statistical Length Scales in Size Effect for Quasibrittle Failure at Crack Initiation",
  booktitle="Safety and Reliability of Engineering Systems and Structures",
  year="2005",
  pages="8",
  publisher="Millpress Rotterdam",
  address="Netherlands",
  isbn="90-5966-040-4"
}