کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
767979 | 897259 | 2008 | 14 صفحه PDF | دانلود رایگان |
This paper presents a method for the identification of hardening parameters and Weibull-parameters in the brittle and brittle–ductile transition region. A small-punch-test device is developed for hot cells, where a miniaturised disk-like specimen is manufactured and deformed by a spherical punch until failure. Its load–displacement-curve is analysed regarding its information about the material behaviour. Using neural networks, an identification routine is developed, which avoids time-consuming calculations with FEM during an optimisation algorithm. Identified material properties are compared with data from tensile tests. Using the identified hardening parameters, Weibull-parameters are calculated for temperatures at which cleavage fracture occurs.
Journal: Engineering Fracture Mechanics - Volume 75, Issue 11, July 2008, Pages 3520–3533