Fatigue Failure of Six Cap Screws From a Hydraulic Coupling

1992 ◽  
pp. 318-323
Keyword(s):  
Fatigue Failure ◽  
Hydraulic Coupling

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 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

Fatigue Failure Analysis Using the Theory of Critical Distance

2011 ◽  
Vol 462-463 ◽  
pp. 663-667 ◽  
Author(s):  
Ruslizam Daud ◽  
Ahmad Kamal Ariffin ◽  
Shahrum Abdullah ◽  
Al Emran Ismail
Keyword(s):  
Stress Concentration ◽  
Fatigue Failure ◽  
Notch Root ◽  
High Stress ◽  
Critical Distance ◽  
Future Research ◽  
Element Analysis ◽  
Linear Elastic ◽  
The Finite Element Analysis ◽  
Elastic Fracture

This paper explores the initial potential of theory of critical distance (TCD) which offers essential fatigue failure prediction in engineering components. The intention is to find the most appropriate TCD approach for a case of multiple stress concentration features in future research. The TCD is based on critical distance from notch root and represents the extension of linear elastic fracture mechanics (LEFM) principles. The approach is allowing possibilities for fatigue limit prediction based on localized stress concentration, which are characterized by high stress gradients. Using the finite element analysis (FEA) results and some data from literature, TCD applications is illustrated by a case study on engineering components in different geometrical notch radius. Further applications of TCD to various kinds of engineering problems are discussed.

scholarly journals Fatigue failure of anterior teeth without ferrule restored with individualized fiber-reinforced post-core foundations

2021 ◽  
Vol 118 ◽  
pp. 104440
Author(s):  
Márk Fráter ◽  
Tekla Sáry ◽  
Gábor Braunitzer ◽  
P. Balázs Szabó ◽  
Lippo Lassila ◽  
...  
Keyword(s):  
Fatigue Failure ◽  
Fiber Reinforced ◽  
Anterior Teeth

Thermal fatigue failure of brass die-casting dies

2012 ◽  
Vol 20 ◽  
pp. 137-146 ◽  
Author(s):  
Dhouha Mellouli ◽  
Nader Haddar ◽  
Alain Köster ◽  
Hassine Ferid Ayedi
Keyword(s):  
Fatigue Failure ◽  
Thermal Fatigue ◽  
Die Casting

Investigation of tensile and high cycle fatigue failure behavior on a TIG welded titanium alloy

2021 ◽  
Vol 132 ◽  
pp. 107115
Author(s):  
Duqiang Ren ◽  
Yun Jiang ◽  
Xiaoan Hu ◽  
Xianzheng Zhang ◽  
Xiaoping Xiang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Failure ◽  
High Cycle Fatigue ◽  
Failure Behavior ◽  
Cycle Fatigue

scholarly journals Personalised high tibial osteotomy has mechanical safety equivalent to generic device in a case–control in silico clinical trial

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Alisdair R. MacLeod ◽  
Nicholas Peckham ◽  
Gil Serrancolí ◽  
Ines Rombach ◽  
Patrick Hourigan ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Relative Risk ◽  
Knee Osteoarthritis ◽  
High Tibial Osteotomy ◽  
Fatigue Failure ◽  
In Silico ◽  
Odds Ratio ◽  
Case Control ◽  
Tibial Osteotomy ◽  
3D Printed

Abstract Background Despite favourable outcomes relatively few surgeons offer high tibial osteotomy (HTO) as a treatment option for early knee osteoarthritis, mainly due to the difficulty of achieving planned correction and reported soft tissue irritation around the plate used to stablise the osteotomy. To compare the mechanical safety of a new personalised 3D printed high tibial osteotomy (HTO) device, created to overcome these issues, with an existing generic device, a case-control in silico virtual clinical trial was conducted. Methods Twenty-eight knee osteoarthritis patients underwent computed tomography (CT) scanning to create a virtual cohort; the cohort was duplicated to form two arms, Generic and Personalised, on which virtual HTO was performed. Finite element analysis was performed to calculate the stresses in the plates arising from simulated physiological activities at three healing stages. The odds ratio indicative of the relative risk of fatigue failure of the HTO plates between the personalised and generic arms was obtained from a multi-level logistic model. Results Here we show, at 12 weeks post-surgery, the odds ratio indicative of the relative risk of fatigue failure was 0.14 (95%CI 0.01 to 2.73, p = 0.20). Conclusions This novel (to the best of our knowledge) in silico trial, comparing the mechanical safety of a new personalised 3D printed high tibial osteotomy device with an existing generic device, shows that there is no increased risk of failure for the new personalised design compared to the existing generic commonly used device. Personalised high tibial osteotomy can overcome the main technical barriers for this type of surgery, our findings support the case for using this technology for treating early knee osteoarthritis.

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