caa a22 4500 465740421 CHVBK 20180323111807.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00035518 doi (NATIONALLICENCE)springer-10.1007/BF00035518 A rate dependent kinetic theory of fracture for polymers [Elektronische Daten] [Andrew Hansen, James Baker-Jarvis] In this paper we develop a rate dependent theory of fracture for polymers valid for variable stress histories. The theory is developed within the framework of the kinetic theory of fracture of solids and compared to experiments for variable stress history loadings. A significant aspect of the theory is the introduction of a crack damage state variable which quantifies submicroscopic crack damage prior to macroscopic failure of the material. A first order differential equation governing the time evolution of the crack damage variable is developed based on first principles of statistical physics. The theory is shown to accurately predict the ultimate stress of polymethyl-methacrylate for constant stress rate loadings ranging over 5 orders of magnitude as well as variable stress histories which include creep and stress rate conditions. Furthermore, the theory predicts qualitatively correct results for submicrocrack concentration under both constant stress and constant stress rate conditions. Kluwer Academic Publishers, 1990 Hansen Andrew Department of Mechanical Engineering, University of Wyoming, 82070, Laramie, Wyoming, USA aut Baker-Jarvis James Department of Engineering Physics, North Dakota State University, 58102, Fargo, North Dakota, USA aut International Journal of Fracture Kluwer Academic Publishers 44/3(1990-08-01), 221-231 0376-9429 44:3<221 1990 44 10704 https://doi.org/10.1007/BF00035518 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00035518 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hansen Andrew Department of Mechanical Engineering, University of Wyoming, 82070, Laramie, Wyoming, USA aut NATIONALLICENCE 700 1- Baker-Jarvis James Department of Engineering Physics, North Dakota State University, 58102, Fargo, North Dakota, USA aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 44/3(1990-08-01), 221-231 0376-9429 44:3<221 1990 44 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer