scholarly journals Influence of the welding method on the impact strength and cyclic fracture toughness parameters of the 09G2S steel

2017 ◽  
Author(s):  
Yu. N. Saraev ◽  
S. V. Gladkovsky ◽  
S. V. Lepikhin ◽  
D. A. Dvoynikov ◽  
I. S. Kamantsev ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Impact Strength ◽  
09G2s Steel ◽  
Welding Method ◽  
Cyclic Fracture ◽  
Cyclic Fracture Toughness ◽  
The Impact

Preparation and Study of Flexural Strength and Impact Strength for Hybrid Composite Materials used in Structural Applications

2020 ◽  
Vol 38 (8A) ◽  
pp. 1117-1125
Author(s):  
Teeb A. Mohameed ◽  
Sihama I. Salih ◽  
Wafaa M. Salih
Keyword(s):  
Fracture Toughness ◽  
Impact Strength ◽  
Flexural Strength ◽  
Polymer Blends ◽  
Laminar Composite ◽  
Kevlar Fiber ◽  
Laminar Composites ◽  
Structural Applications ◽  
Materials Used ◽  
The Impact

 Many of the polymeric materials used for structural purposes have weak mechanical properties, these characteristics can therefore be improved by preparing a hybrid laminar composite. In this work use melting mixing method using screw extruder to prepare sheets of polymer blends and nanocomposites based on polymer blends, and using a hot hydraulic press machine to prepared hybrid laminates composites. Two groups of hybrid laminar composites were prepared, the first group is consist of [((94%PP: 5%PMMA: 1 %( PP-g-MA)): 0.3% ZrO2): 6%KF and 8%KF] and the second group is [((94%PP: 5%UHMWPE: 1 %( PP-g-MA)): 0.3% ZrO2): 6%KF and 8%KF]. The results illustrated the impact strength and fracture toughness are increase with increased weight percentage of Kevlar fiber in for both groups of laminar composites and the highest values for two groups are (58.1, 54.95 KJ/M2) and (8.4, 9.16 MPa√m) respectively, any that, at the rate of increment reached to (120.4%, 107%) and (52.7%, 66.5%) respectively, compared with the neat PP. Moreover, the flexural strength values of the first group samples of hybrid laminar composite remained constant, when added kevlar fiber to nanocomposite. While, the flexural strength values of the second group samples of hybrid laminar composite increase with increase the ratio of kevlar fiber in composite to reach the maximum values (92 MPa) at 8% wt. of kevlar fiber, any, at the rate of increment reached to 39.4% compared with the neat PP. As well as, the results shown that the flexural properties and fracture toughness of the second group samples higher than they are for the first group samples.

scholarly journals Cyclic Fracture Toughness of Railway Axle and Mechanisms of its Fatigue Fracture

2015 ◽  
Vol 16 (2) ◽  
pp. 158-166
Author(s):  
Andriy Sorochak ◽  
Pavlo Maruschak ◽  
Olegas Prentkovskis
Keyword(s):  
Fracture Toughness ◽  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Fracture ◽  
Fatigue Crack Propagation ◽  
Fatigue Cracks ◽  
Railway Axle ◽  
Cyclic Fracture ◽  
Cyclic Fracture Toughness ◽  
Mechanical Interpretation

Abstract The main regularities in fatigue fracture of the railway axle material - the OSL steel - are found in this paper. Micromechanisms of fatigue crack propagation are described and systematized, and a physical-mechanical interpretation of the relief morphology at different stages of crack propagation is proposed for fatigue cracks in specimens cut out of the surface, internal and central layers of the axle.

Effect of strain history on cyclic fracture toughness of alloy VT9

1982 ◽  
Vol 14 (4) ◽  
pp. 451-455
Author(s):  
V. T. Troshchenko ◽  
A. Ya. Krasovskii ◽  
D. P. Sinyavskii ◽  
N. D. Bega ◽  
V. V. Ivakhnenko
Keyword(s):  
Fracture Toughness ◽  
Strain History ◽  
Cyclic Fracture ◽  
Cyclic Fracture Toughness
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