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Slow crack growth in cellulose fibre cements

Mai, Y.W. / Hakeem, M.I.

Slow stable crack growth is a prominent feature of the fracture behaviour of cellulose fibre cements. It is shown that this characteristic can be described by crack growth resistance against crack extension curves based on linear elastic fracture mechanics. Double-cantilever-beam specimens with side grooves are used to obtain such crack resistance curves for a commercial cellulose cement containing approximately 8 % mass fraction of bleached fibres. Both dry and wet samples are tested. Compliances measured during slow crack growth by the unloading/reloading technique at successive crack increments are less than those obtained for saw-cut notches with similar crack lengths. Residual displacements due to either mismatch fracture surfaces or a large inelastic process zone at the crack tip are also observed at zero load.

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Slow crack growth in cellulose fibre cements

Mai, Y.W. / Hakeem, M.I.

Slow stable crack growth is a prominent feature of the fracture behaviour of cellulose fibre cements. It is shown that this characteristic can be described by crack growth resistance against crack extension curves based on linear elastic fracture mechanics. Double-cantilever-beam specimens with side grooves are used to obtain such crack resistance curves for a commercial cellulose cement containing approximately 8 % mass fraction of bleached fibres. Both dry and wet samples are tested. Compliances measured during slow crack growth by the unloading/reloading technique at successive crack increments are less than those obtained for saw-cut notches with similar crack lengths. Residual displacements due to either mismatch fracture surfaces or a large inelastic process zone at the crack tip are also observed at zero load.

Slow crack growth in cellulose fibre cements

Mai, Y.W. / Hakeem, M.I.

Slow stable crack growth is a prominent feature of the fracture behaviour of cellulose fibre cements. It is shown that this characteristic can be described by crack growth resistance against crack extension curves based on linear elastic fracture mechanics. Double-cantilever-beam specimens with side grooves are used to obtain such crack resistance curves for a commercial cellulose cement containing approximately 8 % mass fraction of bleached fibres. Both dry and wet samples are tested. Compliances measured during slow crack growth by the unloading/reloading technique at successive crack increments are less than those obtained for saw-cut notches with similar crack lengths. Residual displacements due to either mismatch fracture surfaces or a large inelastic process zone at the crack tip are also observed at zero load.

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Title:

Slow crack growth in cellulose fibre cements

Additional title:

Langsames Risswachstum in Zellulosefaserzementen

Contributors:

Mai, Y.W. (author) / Hakeem, M.I. (author)

Published in:

Journal of Materials Science ; 19 ; 501-508

Publication date:

1984

Size:

8 Seiten, 10 Bilder, 1 Tabelle, 1 Quelle

DOI:

https://doi.org/10.1007/BF02403237

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

RISSWACHSTUM , VERBUNDWERKSTOFF , ZELLULOSE , FASER , FUELLSTOFF , ZEMENT , MATRIX , WERKSTOFFGEFUEGE , WERKSTOFFPRUEFUNG , BRUCHFESTIGKEIT , BRUCHMECHANIK , MATERIALBRUCH , MECHANISCHE BEANSPRUCHUNG , ANALYSIS (MATHEMATIK) , MATHEMATISCHE LOESUNG , MECHANISCHE SPANNUNG

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