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Analysis of mode-1 crack-tip stress patterns in orthotropic materials

Analyse von Mode-1 Riss-Spitzen-Isospannungs-Feldern in orthotropen Materialien

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Summary

A classification scheme of normal opening mode crack-tip stress patterns for static cracks in orthotropic (composite) materials is presented. Direct application within the framework of coating stress analysis technique as applied to unidirectional or multidirectional glass fibre reinforced epoxies weakened by a sharp crack and subjected to uniaxial and biaxial stress fields is developed. The mutual influence of changing parameters such as ratio of Young's moduli, prestressing parallel to the crack etc on the geometrical configuration of the iso-stress-lines can easily be identified from orthotropic stress loop diagrams.

Übersicht

Dieser Beitrag umfaßt ein Klassifikationsschema für statische mode-1 Rißspitzenisospannungs-felder in orthotropen Kompositmaterialien. Die direkte Anwendung auf durch Risse geschwächte ein- oder mehrfachorientierte glasfaserverstärkte Kunststoffe im Rahmen des spannungsoptischen Oberflächenschichtverfahrens ist gegeben. Der Wechselwirkungseinfluß variabler Parameter wie z. B. Elastizitäts-moduln, homogene Spannung parallel zum Riß usw. auf die geometrische Konfiguration der Isospannungslinien ist leicht aus einem eigens entwickelten orthotropen Spannungslinien-Diagramm abzulesen.

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Authors and Affiliations

  1. Institute of Mechanics, Technical University Vienna, Karlsplatz 13, A - 1040, Vienna, Austria

    H. P. Rossmanith

  2. Institute of Constructive Hydroengineering, Technical University Vienna, Karlsplatz 13, A - 1040, Vienna, Austria

    H. N. Linsbauer

Authors
  1. H. P. Rossmanith
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  2. H. N. Linsbauer
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Rossmanith, H.P., Linsbauer, H.N. Analysis of mode-1 crack-tip stress patterns in orthotropic materials. Ing. arch 55, 258–266 (1985). https://doi.org/10.1007/BF00538220

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  • DOI: https://doi.org/10.1007/BF00538220

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