Defining of the material models for stainless steels to be used in FE modeling

Abstract

The aim of this work is to study the results of tensile tests for austenitic stainless steel type 304 and make accurate FE-models according to the results of the tests. Tensile tests were made at Central Research Institute of Structural Material, Prometey at Saint Petersburg and Mariyenburg in Russia. The test specimens for the tensile tests were produced at Lappeenranta University of Technology in a Laboratory of Steel Structures.

In total 4 different tests were made, two with base material specimens and two with transverse butt weld specimens. Each kind of a specimen was tested at room temperature and at low temperature. By comparing the results of room and low temperature tests of similar test specimen we get to study the results of work hardening that affect the austenitic steels at below room temperature.

The produced specimens are to be modeled accurately and then imported for nonlinear FEM- analyzing. Using the data gained from the tensile tests the aim is to get the models work like the specimens did during the tests. By using the analyzed results of the FE-models the aim is to calculate and get the stress-strain curves that correspond to the results acquired from the tensile tests.

Työn tavoitteena on tutkia austeniittiselle ruostumattomalle terästyypille 1.4301 tehtyjen vetokokeiden tuloksia, jotka suoritettiin huoneenlämmössä sekä alhaisessa lämpötilassa. Tulosten perusteella on tavoitteena tehdä vetokokeiden jännitys-venymäkäyrien käyttäytymistä vastaavat materiaalimallit.