[Zurück]

R. Lach, T. Koch, S. Seidler:
"Influence of the Geometry on the Essential Work of Fracture of Polypropylene Materials";
Vortrag: 17th European Conference on Fracture: Multilevel Approach to Fracture of Materials, Components and Structures, Brno; 02.09.2008 - 05.09.2008; in: "17th European Conference on Fracture: Multilevel Approach to Fracture of Materials, Components and Structures", European Structural Integrity Society, Brno (2008), ISBN: 978-80-214-3692-3; Paper-Nr. PE170313, 7 S.

For reasonable application of the essential-work-of-fracture (EWF) concept to polymers some geometrical requirements has to be fulfilled, whereas these conditions, especially that of plane state of stress and self-similarity of the load-displacement diagrams are often handled very non-critical in the literature. A brief discussion of minimum and maximum valid ligament length and the influence of specimen thickness on toughness has been given, therefore, by comparing data empirically determined with the predictions. Furthermore, the applications of small-sized specimens has been shown on example of ethylen-propylene copolymer.

For reasonable application of the essential-work-of-fracture (EWF) concept to polymers some geometrical requirements has to be fulfilled, whereas these conditions, especially that of plane state of stress and self-similarity of the load-displacement diagrams are often handled very non-critical in the literature. A brief discussion of minimum and maximum valid ligament length and the influence of specimen thickness on toughness has been given, therefore, by comparing data empirically determined with the predictions. Furthermore, the applications of small-sized specimens has been shown on example of ethylen-propylene copolymer.

essential work of fracture, geometrical requirements, polypropylene materials, structure-property relationships

Projektleitung Thomas Koch:
Size effects of near plane-strain fracture parameters of polypropylene thin films with different molecular weight, tacticity and crystalline structure using the essential-work-of-fracture approach