Geometrieunabhängige bruchmechanische Werkstoffkenngrößen - Voraussetzung für die Zähigkeitscharakterisierung von Kunststoffen

摘要: Starting from the history of introducing Charpy test to characterization plastics, polymer-specific requirements for specimen geometry relevant determination fracture mechanics parameters plastics are summarized. Here, influence thickness, configuration and size, a/W-ratio considered. In order characterize independence parameters, in this connection, geometrical factors used estimate without an experimental influence. For these experimentally determined vary a wide range. reason, use constant must cause pronounced under- or over-evaluation on specimens. The relationships between those universally valid independent kind loading (static, dynamic) crack propagation behaviour (stable, unstable).