Automatic Welding, 2016, №03



2016 №03 (03)

DOI of Article 10.15407/as2016.03.04

2016 №03 (05)

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Avtomaticheskaya Svarka (Automatic Welding), #3, 2016, pp. 31-34
 

Calculation-experimental method for determination of spectrum components of non-stationary loading of carbon steel welded joint

A.A. Lukashevich

G.S. Pisarenko Institute for Problems of Strength, NASU. 2 Timiryazevskaya Str., 01014, Kiev, Ukraine. Е-mail: ips@iрр.kiеv.uа
 
Abstract
The time parameters of the spectrum components of non-stationary loading of welded joints of carbon steel were determined, having a dominant influence on the intensity of fatigue fracture of the structural elements of railway locomotives. A new method was offered for analysis of the results of strain gauge measuring of the evolution of deformation heterogeneity in the welded joint HAZ in the process of fatigue crack development. It was established that in each unit of loads at certain frequencies, the deformations exist which are dominant at fatigue fracture. 12 Ref., 5 Figures.
 
Keywords: non-stationary loads, fillet welded joint, carbon steel, fatigue crack growth, strain gauge null-indicator method, time-frequency analysis
 
Received:                20.01.16
Published:               28.04.16
 
 
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