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The propagation of cracks and crack-like defects in thin adhered polymer films

Journal Article


Abstract


  • The strain energy release rate G of a through-thickness crack in a thin film that adheres to a rigid substrate is shown to vary linearly with the film thickness at constant film stress. G is normally small, so adhered polymer films are only expected to crack in the presence of an aggressive environmental agent unless the polymer is very brittle. A minimum film thickness for cracking is likely to be observed. The propagation of crack-like defects in a polyimide in the presence of xylene was examined experimentally. The defects grew at a constant rate (independent of their length) that increased rapidly with film thickness. The minimum film thickness for defect growth was found to be about 2��m. �� 1990 Chapman and Hall Ltd.

UOW Authors


  •   Brown, Hugh (external author)

Publication Date


  • 1990

Citation


  • Brown, H. R., & Yang, A. C. M. (1990). The propagation of cracks and crack-like defects in thin adhered polymer films. Journal of Materials Science, 25(6), 2866-2868. doi:10.1007/BF00584895

Scopus Eid


  • 2-s2.0-0025449287

Web Of Science Accession Number


Start Page


  • 2866

End Page


  • 2868

Volume


  • 25

Issue


  • 6

Place Of Publication


Abstract


  • The strain energy release rate G of a through-thickness crack in a thin film that adheres to a rigid substrate is shown to vary linearly with the film thickness at constant film stress. G is normally small, so adhered polymer films are only expected to crack in the presence of an aggressive environmental agent unless the polymer is very brittle. A minimum film thickness for cracking is likely to be observed. The propagation of crack-like defects in a polyimide in the presence of xylene was examined experimentally. The defects grew at a constant rate (independent of their length) that increased rapidly with film thickness. The minimum film thickness for defect growth was found to be about 2��m. �� 1990 Chapman and Hall Ltd.

UOW Authors


  •   Brown, Hugh (external author)

Publication Date


  • 1990

Citation


  • Brown, H. R., & Yang, A. C. M. (1990). The propagation of cracks and crack-like defects in thin adhered polymer films. Journal of Materials Science, 25(6), 2866-2868. doi:10.1007/BF00584895

Scopus Eid


  • 2-s2.0-0025449287

Web Of Science Accession Number


Start Page


  • 2866

End Page


  • 2868

Volume


  • 25

Issue


  • 6

Place Of Publication