Institute of Physics of Materials AS CR, v. v. i. > Projects > Influence of material properties of stainless steels on reliability of bridge structures

Influence of material properties of stainless steels on reliability of bridge structures

Investigatordoc. Ing. Stanislav Seitl, Ph.D.
Number of Project20-00761S
AgencyGrantová agentura České republiky
Duration2020-01-01 - 2022-12-31

Anotace
New knowledge on the material properties and reliability of load-bearing bridge structures constructed from stainless steel will be obtained within the framework of the project. The limit states will be analysed using numerical models based primarily on the non-linear finite element method. The input parameters of the computational models will be real material characteristics obtained from experiments and processed into histograms. The lifetime of bridge members will be theoretically investigated using linear fracture mechanics and geometry functions proposed using fatigue experiments in laboratory. The reliability analysis will include statistical, sensitivity and probability analysis. Interesting findings can be expected for very slender members with imperfections that generally can have higher stress, lower resistance and faster fatigue degradation in comparison with carbon steel bars. New findings are expected from laboratory experiments investigating fatigue degradation processes that have not yet been observed in existing bridges, which are at the beginning of their life cycle.


2021

Braet L., Juhászová T., Jindra D., Miarka P., Seitl S.: Finding the optimal stress state of a stainless-steel IPE profile for fatigue experiments. Procedia Struct. Integr. 33 (2021) 1065-1072

Klusák J., Kopp D.: 3D assessment of surface influence on crack initiation in sharp notches under a mixed mode of loading. Theor. Appl. Fract. Mech. 112 (2021) 102920

Jindra D., Kala Z., Kala J., Seitl S.: Experimental and Numerical simulation of a Three Point Bending Test of a Stainless Steel Beam. Transportation Research Procedia 55 (2021) 1114-1121

Lopez-Crespo C., Cruces A., Seitl S., Moreno B., Lopez Crespo P.: Estimation of the Plastic Zone in Fatigue via Micro-Indentation. Materials 14 (2021) 5885