Possible disturbance of invariance of fatigue failure curves caused by the phenomenon of crack closure

1985 ◽  
Vol 20 (6) ◽  
pp. 562-569 ◽  
Author(s):  
O. N. Romaniv ◽  
A. N. Tkach ◽  
Yu. N. Lenets
Keyword(s):  
Crack Closure ◽  
Fatigue Failure

Influence of crack closure and loading cycle asymmetry on kinetic fatigue failure curves at normal and low temperatures

1987 ◽  
Vol 23 (3) ◽  
pp. 285-289
Author(s):  
O. P. Ostash ◽  
V. T. Zhmur-Klimenko ◽  
E. M. Kostyk ◽  
A. B. Kunovskii
Keyword(s):  
Crack Closure ◽  
Fatigue Failure ◽  
Low Temperatures ◽  
Cycle Asymmetry ◽  
Loading Cycle

Curvilinear crack closure in a sheet element under the influence of a temperature field

2016 ◽  
Vol 19 (4) ◽  
pp. 36-43 ◽  
Author(s):  
V. Mirsalimov ◽  
◽  
A. Mustafayev ◽  
Keyword(s):  
Temperature Field ◽  
Crack Closure ◽  
Curvilinear Crack

Calculating Energy Release Rate as a Function of Crack Length Using a Multiple-Step Crack Closure Technique in Tire Finite Element Models

2018 ◽  
Vol 46 (3) ◽  
pp. 130-152
Author(s):  
Dennis S. Kelliher
Keyword(s):  
Finite Element ◽  
Energy Release Rate ◽  
Crack Length ◽  
Energy Release ◽  
Crack Closure ◽  
Release Rate ◽  
Fatigue Behavior ◽  
Three Dimensions ◽  
Quantitative Prediction ◽  
Closure Technique

ABSTRACT When performing predictive durability analyses on tires using finite element methods, it is generally recognized that energy release rate (ERR) is the best measure by which to characterize the fatigue behavior of rubber. By addressing actual cracks in a simulation geometry, ERR provides a more appropriate durability criterion than the strain energy density (SED) of geometries without cracks. If determined as a function of crack length and loading history, and augmented with material crack growth properties, ERR allows for a quantitative prediction of fatigue life. Complications arise, however, from extra steps required to implement the calculation of ERR within the analysis process. This article presents an overview and some details of a method to perform such analyses. The method involves a preprocessing step that automates the creation of a ribbon crack within an axisymmetric-geometry finite element model at a predetermined location. After inflating and expanding to three dimensions to fully load the tire against a surface, full ribbon sections of the crack are then incrementally closed through multiple solution steps, finally achieving complete closure. A postprocessing step is developed to determine ERR as a function of crack length from this enforced crack closure technique. This includes an innovative approach to calculating ERR as the crack length approaches zero.

A comparative study of fatigue crack closure

1977 ◽  
Author(s):  
J. RUEPING ◽  
B. HILLBERRY ◽  
S. METTLER ◽  
W. STEVENSON
Keyword(s):  
Fatigue Crack ◽  
Comparative Study ◽  
Crack Closure ◽  
Fatigue Crack Closure

Experimental investigation of fatigue failure in an ASTM A401 compression spring of a passenger car

2020 ◽  
Vol 62 (6) ◽  
pp. 626-632
Author(s):  
Ashish Gupta ◽  
Vikas Rastogi ◽  
Loveleen Kumar Bhagi
Keyword(s):  
Experimental Investigation ◽  
Fatigue Failure ◽  
Passenger Car ◽  
Compression Spring

A Review of Crack Closure

1984 ◽  
Author(s):  
S. Banerjee
Keyword(s):  
Crack Closure

A method for evaluating the edge strength of soil-cutting parts of forestry machines

2020 ◽  
Vol 67 (1) ◽  
pp. 111-115
Author(s):  
Sergey A. Voynash ◽  
Viktoriya A. Sokolova ◽  
Viktor I. Kretinin ◽  
Viktor A. Markov ◽  
Elena A. Alekseeva Alekseeva ◽  
...  
Keyword(s):  
Fatigue Failure ◽  
Research Purpose ◽  
Solid Inclusion ◽  
Hard Alloys ◽  
Blade Edge ◽  
Solid Soil ◽  
Soil Cutting ◽  
Cyclic Impact ◽  
Working Bodies ◽  
Reinforcing Layer

One of the main factors that determine the resistance of blade working bodies against damage under dynamic loads is their resistance to plastic crumpling, brittle or fatigue failure. Hard alloys that strengthen the blades of tillage parts are more brittle materials than steel, so the blunting of their edges is caused by the formation of cracks, their gradual growth or microchipping, even from a possible single impact of a solid inclusion in the soil. In addition to the usual brittle fracture of hard alloys, fatigue failure occurs under cyclic impact conditions. (Research purpose) The research purpose is in identifying the pattern of destruction of the blade edge of soil-cutting parts of forestry machines and theoretically justifying the algorithm for assessing the strength to determine the rational thickness of the wear-resistant coating during hardening. (Materials and methods) The article presents the main regularities of the influence of material properties and geometric parameters of the blade on the radius of rounding. (Results and discussion) The process of breaking the edge of the blade of hardened working bodies of forestry machines has been studied. The claim that the blunting of the blades is mainly due to its destruction and not to wear has been proved. The article presents a method for evaluating the strength of bimetallic blades of soil-cutting parts of forestry machines. It was found that the blunting of the blade occurs as a result of edge destruction in the process of multiple impacts of solid soil inclusions along the edge of the blade. (Conclusions) The article shows that the destruction of the edge of the blade leads to blunting of soil-cutting parts, which affects their performance. It was found that the sharpness of a self-sharpening hardened blade is determined by the thickness of the reinforcing layer and its ability to resist destruction under impact.

scholarly journals Fatigue failure analysis of drilling tools for ultra-deep wells in shunbei Block

2018 ◽  
Vol 423 ◽  
pp. 012190
Author(s):  
Biao Liu ◽  
Zhongxi Zhu ◽  
Jun Zhang ◽  
Wanneng Lei ◽  
Baichuan Wu
Keyword(s):  
Failure Analysis ◽  
Fatigue Failure ◽  
Deep Wells ◽  
Drilling Tools
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