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SEITL, S. KLUSÁK, J. VESELÝ, V. ŘOUTIL, L.
Original Title
Wedge-Splitting Test Determination of Minimal Starting Notch Length for Various Cement Based Composites. Part II: Crack and Notch Fracture Mechanics Approaches
Type
journal article - other
Language
English
Original Abstract
The paper focuses on the geometrical proportions of cube-shaped quasi-brittle specimens subjected to a wedge-splitting test (WST). The minimal/optimal initial crack/notch length for successful performance of WST on these specimens is studied numerically (ANSYS). This second part of the paper treats the problem asymptotically, i.e. from the point of view of a very fine grained silicate composite material with negligible characteristic length which describes the level of the material brittleness (i.e. brittle). The problem of competition of the crack initiation point between the notch tip and the groove corner in the load-imposing area of the specimen is solved using theories of both linear elastic fracture mechanics and fracture mechanics of generalized singular stress concentrators. The numerically obtained crack/notch length is compared to results of numerical simulations using cohesive crack model reported in the first part of the paper. The minimal notch length is recommended.
Keywords
wedge-splitting test, cementitious composites, quasi-brittle fracture, brittle fracture, notch length, general singular stress concentrator.
Authors
SEITL, S.; KLUSÁK, J.; VESELÝ, V.; ŘOUTIL, L.
RIV year
2010
Released
5. 10. 2010
Location
Švýcarsko
ISBN
1013-9826
Periodical
Key Engineering Materials (print)
Year of study
10
Number
4
State
Swiss Confederation
Pages from
81
Pages to
84
Pages count
BibTex
@article{BUT50172, author="Stanislav {Seitl} and Jan {Klusák} and Václav {Veselý} and Ladislav {Řoutil}", title="Wedge-Splitting Test Determination of Minimal Starting Notch Length for Various Cement Based Composites. Part II: Crack and Notch Fracture Mechanics Approaches", journal="Key Engineering Materials (print)", year="2010", volume="10", number="4", pages="81--84", issn="1013-9826" }