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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
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" }