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document
Fatigue Crack Growth Rate in Long Term Operated 19th Century Puddle Iron
Abstract
The paper presents the results of an experimental investigation of the fatigue crack growth in plane specimens made from puddle iron. Eiffel Bridge from Portugal and 19th-century viaduct steel member from Poland. The tests were performed under the load ratios R = 0.05, 0.1 and 0.5. There were also considered the different description of fatigue crack growth rate using strain energy density parameter based on cyclic J-integral. The fatigue crack growth rate in the tested material is significantly higher than its "ancient" equivalent i.e. old 19th-century mild steel. There is also a noticeable strong contribution of the crack closure effect.