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On the mechanism of surface embrittlement of ductile thermoplastics by brittle surface layers

	Plastics and Rubber Institute, London: 8th International Conference on Deformation, Yield and Fracture of Polymers '91. Preprints London, 1991 pp.65/1-65/4
	International Conference on Deformation, Yield and Fracture of Polymers <8, 1991, Cambridge>

	English
	Conference Paper
	Fraunhofer IWM ()
	brittleness; Bruch; coating; crack propagation; Dehngeschwindigkeit; embrittlement; fracture; Rißwachstum; Schicht; Sprödigkeit; strainrate; surface layer; thermoplast; thermoplastic; Versprödung

Abstract
Surface embrittlement of ductile thermoplastics by brittle surface layers is due to the dynamic stress- strain conditions in front of a running crack at transition from the coating layer into the substrate. In this study the fracture behaviour of a differently coated substrate has been predicted combining the respective fracture mechanics, results. These predictions have been compared with the results of impact experiments on coated specimens.