Sicherheit gegen Rissentstehung in statisch beanspruchten Stahlkonstruktionen
| Author(s): |
Michael Volz
Helmut Saal Frank Steidl |
|---|---|
| Medium: | journal article |
| Language(s): | German |
| Published in: | Stahlbau, April 2011, n. 4, v. 80 |
| Page(s): | 282-288 |
| DOI: | 10.1002/stab.201101421 |
| Abstract: |
Safety against crack initiation in steel structures without fatigue loading.When fracture mechanics is used for selection of steels to avoid brittle fracture the indispensable crack assumption the question of crack initiation arises with structures without fatigue loading. The crack initiation is assumed to depend upon the maximum principal strain, where the critical value of the principal strain is a function of several determining factors. Experimental tests and accompanying nonlinear FE-analyses are performed with unwelded and welded specimens with variation of: shape, thickness of specimens, strength and Charpy impact toughness of the steel and test temperature. The consideration of triaxiality of the stress state and maximum principal strain obtained from the nonlinear FE-analysis for the load at crack initiation in the test together with the other test parameters leads to a criterion for crack initiation which gives the critical maximum principal strain as a function of triaxiality, temperature, strength, impact toughness and thickness of the material. This includes the effect of welding residual stresses by their effect on the triaxiality of the stress state. |
| Keywords: |
finite element analysis FEA brittle fracture principal strain residual stress gusset plate
|
| Available from: | Refer to publisher |
- About this
data sheet - Reference-ID
10065031 - Published on:
22/06/2011 - Last updated on:
13/08/2014
