39th Danubia-Adria Symposium on Advances in Experimental Mechanics
Sprache des Tagungstitel:
Englisch
Original Kurzfassung:
Due to the dynamic effects the applicability of conventional bending type impact tests (i.e., Charpy test) is limited and a force-based fracture mechanics analysis provides reliable results only up to about 1 m/s. Two overcome these problems two methods are proposed:
-) Tensile fracture tests. However, due to the single action loading mode, an asymmetry of the crack tip stress field was observed [1]. This dynamic mixed mode loading condition of the crack tip makes the determination of true mode I fracture toughness using the load signal above 6-8 m/s difficult.
-) Dynamic methods (i.e. Dynamic Key Curve [refs]) may be used to determine dynamic fracture toughness values above 1 m/s [2]. These methods are complicated both from experimental and from a data reduction point of view and require the determination a number of different loading rate dependent material parameters.
Forschungs-