The impact fatigue properties of iron and steel

Johnson, Andrew; Storey, R. J.

doi:10.1016/j.jsv.2007.06.044

Cited by 21 publications

(13 citation statements)

References 27 publications

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“…This comparison is difficult to be done because of the diversity of parameters used to describe the durability at IF (see Table 1). For the cases when the authors carried out such studies using the same parameters some conclusions are relevant (Johnson and Storey 2007). It should be mentioned that the IF frequency is lower than in the case of NIF.…”

Section: Particularities Of Impact Fatigue Comparing With Non-impact mentioning

confidence: 92%

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Estimating durability of steels at repeated bending impacts

2008

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Many components are subjected to repeated impacts, or in some cases these impacts can appear as additional loads. Repeated impacts define a fatigue phenomenon known under the name of Impact Fatigue. Because the strain rate changes the material characteristics it is to expect that the material properties at impact fatigue to be different in regard to those obtained at non-impact fatigue. This paper presents a classification of repeated impact tests, and starting from this a series of parameters used for durability estimation will be analyzed. The high number of parameters used by different authors creates difficulties in comparison the different laboratories results. The importance of the shape and dimensions of specimens, and the stiffness of supports are highlighted. In order to avoid these influences the authors proposed an experimental technique, based on testing of Charpy specimens, in similar conditions as single impact test. A new parameter η is proposed in order to correlate the durability at repeated impacts with the Charpy V Notch (CVN) impact energy.

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Section: Particularities Of Impact Fatigue Comparing With Non-impact mentioning

confidence: 92%

“…The IF tests represent a distinct category of fatigue tests characterized by different types of loading conditions. Related to the other tests from this class considered non impact fatigue tests (NIF), they represent an exception (Nakayama and Tanaka 1979;Johnson 2003;Dumitru et al 2006;Johnson and Storey 2007).…”

Section: Introductionmentioning

confidence: 99%

Estimating durability of steels at repeated bending impacts

2008

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“…In Johnson and Storey (2007), a phenomenological model was proposed to analyse the IF behaviour in special under plain carbon steel. (The results obtained in that study are not relevant for this research; however, it is important to emphasise the methodology used for analysis of results).…”

Section: Fatigue Lifementioning

confidence: 99%

Dynamic fractures of adhesively bonded carbon fibre-reinforced polymeric joints

Casas-Rodríguez¹,

Ashcroft

Silberschmidt

2015

Structural Integrity and Durability of Advanced Composites

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“…Since the fatigue of material is a surface problem, significant fatigue strength improvements can be accomplished with the surface heat treatment [5]. Because of the frequent impacts of rapping device, this welded joint is exposed to the high-cycle fatigue.…”

Section: Introductionmentioning

confidence: 99%

Influence of fatigue impact loading on radial carrier and rapping device fillet weld strength

et al. 2015

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Professional paperThe device used to shake off the ash of the steam boiler harp consists of a drive shaft which has radial carriers welded on. During the operation of the waste incinerator steam boiler in Riverside, a fracture of the radial carrier and drive shaft weld occurred. Such a welded T-joint is made as a double fillet weld. It is loaded with the impact loading which causes the fatigue of material because of its repetition. The analytical calculation, with which the loadbearing capacity of the welded joint is determined, is suggested in this paper. The suggested analytical calculation of the mean impact force is based on the law of momentum conservation during the collision of rapping device and elastically deformable heat exchanger harp. The mean impact force is applied for the weld strength calculation. The results showed that the use of double fillet weld loaded with the fatigue impact loading was a bad choice. The suggested analytical calculation model is applicable for the rapping device design. Keywords: double fillet weld; fatigue; impact loading; rapping device; strength Utjecaj udarnog zamornog opterećenja na čvrstoću kutnog zavarenog spoja radijalnog nosača i pogonskog vratila udaračaStručni članak Uređaj za stresanje pepela s izmjenjivačkih harfi parnog kotla sastoji se od pogonskog vratila na koje su zavareni radijalni nosači čekića. U radu parnog kotla spalionice smeća u Riverside-u došlo je do loma zavarenog spoja radijalnog nosača i pogonskog vratila udarača. Zavareni spoj radijalnog nosača i vratila izveden je kao obostrani kutni zavareni spoj. Ovaj zavareni spoj opterećen je udarnim opterećenjem koje zbog ponavljajućeg karaktera prouzrokuje zamor materijala. U radu je predložen analitički proračun kojim je utvrđena nosivost zavarenog spoja. Predloženi analitički proračun srednje sile sudara temelji se na zakonu očuvanja količine gibanja uslijed sudara čekića udarača i elastično deformabilne harfe izmjenjivača topline. Srednja sila sudara primjenjuje se kod proračuna čvrstoće zavarenog spoja. Dobiveni rezultati pokazali su da je primjena kutnog zavarenog spoja opterećenog udarnim zamornim opterećenjem loš izbor. Predloženi model analitičkog proračuna moguće je primijeniti kod dizajna udarača.

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The impact fatigue properties of iron and steel

Cited by 21 publications

References 27 publications

Estimating durability of steels at repeated bending impacts

Estimating durability of steels at repeated bending impacts

Dynamic fractures of adhesively bonded carbon fibre-reinforced polymeric joints

Influence of fatigue impact loading on radial carrier and rapping device fillet weld strength

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