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  4. On sizes and contour stresses of crack tip crazes in thermoplastics
 
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1988
Conference Paper
Title

On sizes and contour stresses of crack tip crazes in thermoplastics

Other Title
Zu Größe und Spannungsverlauf in Craze-Zonen in Thermoplasten
Abstract
The finite element method is applied to contours of craze zones in front of crack tips in Poly(methyl methacrylate) (PMMA) and Poly(vinyl chloride) (PVC) during fatigue crack propagation (FCP) measured by interferometry. Stress distributions along the craze contours at different rates and cycle numbers are computed for both, continuous and retarded FCP. Differences in rate dependence and magnitude of the stresses are found but, in the explanation of the difference in FCP mode, the critical extension ratio of the craze fibrils may be more significant. (IWM)
Author(s)
Könczöl, L.
Beran, L.
Döll, W.
Mainwork
7th International Conference on Deformation, Yield and Fracture of Polymers '88  
Conference
International Conference on Deformation, Yield and Fracture of Polymers 1988  
Language
English
Fraunhofer-Institut für Werkstoffmechanik IWM  
Keyword(s)
  • craze zone

  • Dehnung

  • Ermüdungsbelastung

  • extension ratio

  • fatigue

  • finite element analysis

  • Inerferenzoptik

  • interferometry

  • PMMA

  • PVC

  • Spannungsverteilung

  • stress distribution

  • thermoplast

  • thermoplastic

  • Wechsellast

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