Kinetics of fatigue crack growth and crack closure effect in long term operating steel manufactured at the turn of the 19 th and 20 th centuries

Lesiuk, Grzegorz; Szata, M.; Correia, José A.F.O.; Jesus, Abílio M.P. De; Berto, Filippo

doi:10.1016/j.engfracmech.2017.04.044

Cited by 34 publications

(24 citation statements)

References 29 publications

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“…(d) A comparison with the (long) crack growth curves presented in [44] for bridge steels, and in [49] for crack growth in the high-strength aerospace steels 4340 and D6ac steel. (e) The da/dN versus ∆K curves associated with a "Puddle steel" that was manufactured in Europe circa 1850 [50]. (f) The predicted crack growth curves for test specimen SLM1 and the predicted upper and lower bound curves shown in Figure 8.…”

Section: Am 316l Stainless Steelmentioning

confidence: 99%

Crack Growth in a Range of Additively Manufactured Aerospace Structural Materials

et al. 2018

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The aerospace industry is now beginning to adopt Additive Manufacturing (AM), both for new aircraft design and to help improve aircraft availability (aircraft sustainment). However, MIL-STD 1530 highlights that to certify airworthiness, the operational life of the airframe must be determined by a damage tolerance analysis. MIL-STD 1530 also states that in this process, the role of testing is merely to validate or correct the analysis. Consequently, if AM-produced parts are to be used as load-carrying members, it is important that the d a / d N versus ΔK curves be determined and, if possible, a valid mathematical representation determined. The present paper demonstrates that for AM Ti-6Al-4V, AM 316L stainless steel, and AM AerMet 100 steel, the d a / d N versus ΔK curves can be represented reasonably well by the Hartman-Schijve variant of the NASGRO crack growth equation. It is also shown that the variability in the various AM d a / d N versus Δ K curves is captured reasonably well by using the curve determined for conventionally manufactured materials and allowing for changes in the threshold and the cyclic fracture toughness terms.

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Section: Am 316l Stainless Steelmentioning

confidence: 99%

Crack Growth in a Range of Additively Manufactured Aerospace Structural Materials

et al. 2018

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“…This fact indicates for possible classification of the tested materials as a puddle iron. Based on the theory of degradation of old puddle iron [6,7], the low carbon content (<0.1%C) and lack of the de-oxidation element -Si predestine this material for the microstructural degradation processes.…”

Section: Materials Investigationmentioning

confidence: 99%

“…For the puddle iron from viaduct (1863) similar procedure (fully described in refs. [6,8]) was adopted. Due to material limitations, the size of the CT specimen was decreased.…”

Section: A) Ct Specimen For Mode I Test (Eiffel Bridge) [8] B) Macmentioning

confidence: 99%

“…According to the experimental procedure described in refs. [6,8], the crack closure point as well as corresponded and levels was estimated in order to evaluate the effective stress intensity range ( ) based on the Elber concept [10]. Finally, the Kinetic Fatigue Fracture Diagrams were constructed for both materials - A noticeable is R-ratio effect in KFFD represented by shifted / curves ( Fig.…”

Section: A) Ct Specimen For Mode I Test (Eiffel Bridge) [8] B) Macmentioning

confidence: 99%

“…Enlarged ferrite grains (1863 iron) with non-metallic inclusion chains and degradation precipitations (B), etched 5 %HNO 3[6].…”

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confidence: 99%

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Fatigue Crack Growth Rate in Long Term Operated 19th Century Puddle Iron

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Fatigue resistance curves for single and double shear riveted joints from old portuguese metallic bridges

Pedrosa

Correia

Rebelo

et al. 2019

Engineering Failure Analysis

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The maintenance and safety of ancient bridges is a major concern of governmental authorities. In particular, the safety of old riveted bridges fabricated and placed into service at the end of the 19th century deserves particular attention. These structures are susceptible to exhibit high fatigue damage levels due to their long operational period with increasing traffic intensity associated to an original design not covering the fatigue phenomenon. This paper reviews recent fatigue behaviour investigations on single and double shear riveted joints performed by Universities of Porto (Portugal), Trás-os-Montes e Alto Douro (Portugal), and Wrocław (Poland), in particular concerning the fatigue characterization of riveted joints extracted from representative Portuguese riveted bridges, namely the Eiffel, Luiz I, Fão, Pinhão and Trezói bridges. In order to overcome the influence of scatter and establish a reliable assessment for the obtained experimental data, two statistical approaches were used: implement linearized boundaries following the recommendation in ASTM E739 standard and defining probabilistic SeN fields using the Castillo & Fernández-Canteli model. This statistical analysis allows to propose design SeN curves for single and double riveted joints and evaluate the applicability (safety) of using the design curves suggested in Eurocode 3 as well as design curves proposed by Taras and Greiner.

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Kinetics of fatigue crack growth and crack closure effect in long term operating steel manufactured at the turn of the 19 th and 20 th centuries

Cited by 34 publications

References 29 publications

Crack Growth in a Range of Additively Manufactured Aerospace Structural Materials

Crack Growth in a Range of Additively Manufactured Aerospace Structural Materials

Fatigue Crack Growth Rate in Long Term Operated 19th Century Puddle Iron

Fatigue resistance curves for single and double shear riveted joints from old portuguese metallic bridges

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