System Wear Life Estimation Under Uncertainty

2018 ◽  
Author(s):  
Mohammad Pourmostafaei ◽  
Mohammad Pourgol-Mohammad ◽  
Mojtaba Yazdani ◽  
Hossein Salimi
Keyword(s):  
Experimental Data ◽  
Sliding Wear ◽  
Normal Load ◽  
Material Loss ◽  
Life Estimation ◽  
Wear Life ◽  
Pin On Disc ◽  
Load Effects ◽  
Sliding Distance ◽  
Degradation Evaluation

In this paper, a new model is proposed for system degradation evaluation under sliding wear failure mechanism. This model estimates the material loss by progression of sliding distance. This model is generated by considering physical and geometrical aspects of system under wear mechanism. Several sets of experimental data are used for validation of the presented model. These experimental data are related to pin-on-disc test of Tungsten Carbide pins. These sets of data include initially conformal and non-conformal contacts. One set of data of pin-on-disc test by ASTM-G99 standard is used for additional validation of the model and for investigation of normal load effects on the parameters of presented model. Finally, uncertainty analysis is done by Monte-Carlo simulation to determine the variations of the predicted wear caused material loss.

scholarly journals Optimization of Dry Sliding Wear Performance of Ceramic Whisker Filled Epoxy Composites Using Taguchi Approach

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
M. Sudheer ◽  
Ravikantha Prabhu ◽  
K. Raju ◽  
Thirumaleshwara Bhat
Keyword(s):  
Wear Rate ◽  
Sliding Wear ◽  
Normal Load ◽  
Epoxy Composites ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Performance ◽  
Casting Technique ◽  
Pin On Disc ◽  
Sliding Distance

This study evaluates the influence of independent parameters such as sliding velocity (A), normal load (B), filler content (C), and sliding distance (D) on wear performance of potassium-titanate-whiskers (PTW) reinforced epoxy composites using a statistical approach. The PTW were reinforced in epoxy resin to prepare whisker reinforced composites of different compositions using vacuum-assisted casting technique. Dry sliding wear tests were conducted using a standard pin on disc test setup following a well planned experimental schedule based on Taguchi’s orthogonal arrays. With the signal-to-noise (S/N) ratio and analysis of variance (ANOVA) optimal combination of parameters to minimize the wear rate was determined. It was found that inclusion of PTW has greatly improved the wear resistance property of the composites. Normal load was found to be the most significant factor affecting the wear rate followed by (C), (D), and (A). Interaction effects of various control parameters were less significant on wear rate of composites.

Effect of Reinforcements on the Sliding Wear Behavior of Self-Lubricating AZ91D-SiC-Gr Hybrid Composites

2022 ◽  
Vol 10 (1) ◽  
pp. 1-19
Author(s):  
Sandeep Kumar Khatkar ◽  
Rajeev Verma ◽  
Suman Kant ◽  
Narendra Mohan Suri
Keyword(s):  
Wear Rate ◽  
Sliding Wear ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Signal To Noise Ratio ◽  
Normal Load ◽  
Critical Factor ◽  
Wear Properties ◽  
Pin On Disc ◽  
Sliding Distance

This article statistically investigates the effect of various parameters such as material factors: silicon carbide (SiC) reinforcement, graphite (Gr) reinforcement and mechanical factors: normal load, sliding distance and speed on the sliding wear rate of vacuum stir cast self-lubricating AZ91D-SiC-Gr hybrid magnesium composites. The sliding wear tests have been performed on pin-on-disc tribometer at 10-50N loads, 1-3m/s sliding speed and 1000-2000m sliding distance. It has been examined that hybrid composites yielded improved wear resistance with reinforcement of SiC and solid lubricant graphite. ANOVA and signal-to-noise ratio investigation indicated that applied load was the most critical factor influencing the wear rate, followed by sliding distance. Further, the AZ91D/5SiC/5Gr hybrid composite has exhibited the best wear properties. From the SEM and EDS analysis of worn surfaces, delamination was confirmed as the dominant wear mechanism for AZ91D-SiC-Gr hybrid composites.

scholarly journals Wear analysis of natural-inorganic fiber reinforced automotive brake composites

2021 ◽  
pp. 36-44
Author(s):  
Tej Singh ◽  
Gusztáv Fekete
Keyword(s):  
Sliding Wear ◽  
Normal Load ◽  
Sliding Velocity ◽  
Wear Properties ◽  
Banana Fiber ◽  
Wear Performance ◽  
Significant Control ◽  
Pin On Disc ◽  
Four Levels ◽  
Sliding Distance

Brake friction composite materials comprising varying proportions of natural (banana) and inorganic (lapinus) fibers were designed, fabricated by compression molding, and characterized for sliding wear performance. The sliding wear properties of the manufactured friction composites have been studied by the Taguchi method. An orthogonal array (L 16) was used to investigate the influence of sliding wear parameters. A series of tests were conducted on a pin-on-disc machine by considering four control parameters: composition, normal load, sliding velocity, and sliding distance, each having four levels. The results showed that the wear in terms of weight loss decreases with increasing banana fiber and increases with increasing lapinus fiber, normal load, sliding velocity, and sliding distance. The results indicate that the normal load emerges as the most significant control parameter affecting wear performance, followed by sliding distance and sliding velocity.

Physics of Failure-Based Reliability Assessment for Systems Exposed to Sliding Wear Under Uncertainty

2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Mohammad Pourmostafaei ◽  
Mohammad Pourgol-Mohammad ◽  
Mojtaba Yazdani ◽  
Hossein Salimi
Keyword(s):  
Experimental Data ◽  
Failure Mechanism ◽  
Sliding Wear ◽  
Reliability Assessment ◽  
Material Loss ◽  
Physics Of Failure ◽  
System Data ◽  
Pin On Disk ◽  
Disk Test ◽  
Degradation Evaluation

Abstract In this paper, a new model is proposed for system degradation evaluation under sliding wear failure mechanism. This model estimates the material loss with respect to progression of sliding distance. This model is generated by considering physical and geometrical aspects of the system which is under wear failure mechanism. Several sets of experimental data are used for validation of the presented model. These experimental data are related to the pin-on-disk test including initially conformal and nonconformal contacts. A dataset of the pin-on-disk test by ASTM-G99 standard is used for additional model validation. The rail system data are employed for validation of the model in the practical systems. Uncertainty is analyzed by Monte Carlo simulation to determine the variations of the predicted material loss. Finally, the reliability assessment of these systems is performed.

scholarly journals Influence of Test Conditions on Sliding Wear Performance of High Velocity Air Fuel-Sprayed WC–CoCr Coatings

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3074
Author(s):  
Kaveh Torkashvand ◽  
Vinod Krishna Selpol ◽  
Mohit Gupta ◽  
Shrikant Joshi
Keyword(s):  
Wear Rate ◽  
Test Performance ◽  
Sliding Wear ◽  
Normal Load ◽  
Specific Wear Rate ◽  
Wear Behaviour ◽  
Wear Performance ◽  
Test Conditions ◽  
Test Parameters ◽  
Sliding Distance

Sliding wear performance of thermal spray WC-based coatings has been widely studied. However, there is no systematic investigation on the influence of test conditions on wear behaviour of these coatings. In order to have a good understanding of the effect of test parameters on sliding wear test performance of HVAF-sprayed WC–CoCr coatings, ball-on-disc tests were conducted under varying test conditions, including different angular velocities, loads and sliding distances. Under normal load of 20 N and sliding distance of 5 km (used as ‘reference’ conditions), it was shown that, despite changes in angular velocity (from 1333 rpm up to 2400 rpm), specific wear rate values experienced no major variation. No major change was observed in specific wear rate values even upon increasing the load from 20 N to 40 N and sliding distance from 5 km to 10 km, and no significant change was noted in the prevailing wear mechanism, either. Results suggest that no dramatic changes in applicable wear regime occur over the window of test parameters investigated. Consequently, the findings of this study inspire confidence in utilizing test conditions within the above range to rank different WC-based coatings.

scholarly journals Dry Sliding Wear Behaviour of Titanium (Grade 5) Alloy by Using Response Surface Methodology

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
S. R. Chauhan ◽  
Kali Dass
Keyword(s):  
Sliding Wear ◽  
Normal Load ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Sliding Speed ◽  
Grade 5 ◽  
Titanium Grade ◽  
Sliding Distance ◽  
Sliding Wear Behaviour

The dry sliding wear behaviour of titanium (Grade 5) alloy has been investigated in order to highlight the mechanisms responsible for the poor wear resistance under different applied normal load, sliding speed, and sliding distance conditions. Design of experimental technique, that is, response surface methodology (RSM), has been used to accomplish the objective of the experimental study. The experimental plan for three factors at three levels using face-centre central composite design (CCD) has been employed. The results indicated that the specific wear rate increases with an increase in the applied normal load and sliding speed. However, it decreases with an increase in the sliding distance and a decrease in the sliding speed. The worn surfaces of the titanium alloy specimens were analyzed with the help of scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) techniques. The predicted result also shows the close agreement with the experimental results and hence the developed models could be used for prediction of wear behaviour satisfactorily.

scholarly journals SLIDING WEAR AND FRICTION BEHAVIOR OF FUEL ROD MATERIAL IN WATER AND DRY STATE

2012 ◽  
Vol 06 ◽  
pp. 479-484
Author(s):  
JIN MOO PARK ◽  
JAE HOON KIM ◽  
KYEONG LAK JEON ◽  
JUN KYU PARK
Keyword(s):  
Zirconium Alloy ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Wear Volume ◽  
Surface Zone ◽  
Friction Behavior ◽  
Fuel Rod ◽  
Heat Treated ◽  
Pin On Disc ◽  
Sliding Distance

In water cooled reactors, the friction between spacer grid and fuel rod can lead to severe wear and it is an important topic to study. In the present study, sliding wear behavior of zirconium alloy was investigated in water and dry state using the pin-on-disc sliding wear tester. Sliding wear resistance of zirconium alloy against heat treated inconel alloy was examined at room temperature. The parameters in this study were sliding velocity, axial load and sliding distance. The wear characteristics of zirconium alloy was evaluated by friction coefficient, specific wear rate and wear volume. The micro-mechanisms responsible for wear in zirconium alloy were identified to be micro-cutting, micro-pitting, delamination and micro-cracking of deformed surface zone.

Sliding Wear Properties of near β Titanium Alloy as a Function of β Solution Treatment Temperature

2013 ◽  
Vol 315 ◽  
pp. 567-571
Author(s):  
Srinivasu Gangi Setti ◽  
R.N. Rao ◽  
T.K. Nandy
Keyword(s):  
Weight Loss ◽  
Titanium Alloy ◽  
Sliding Wear ◽  
Applied Load ◽  
Solution Treatment ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
Wear Properties ◽  
Pin On Disc ◽  
Sliding Distance

The present paper describes the effect of β solution treatment temperature on the sliding wear properties of near β titanium alloy (Ti-10V-4.5Fe-3Al) was examined under three different temperatures 800, 900 and 1000 °C, varying applied load 3, 6 and 9 kgf at a fixed rotational speed of 500 rpm for 16 minutes duration. The track diameter is varied 40, 80 and 120 mm in order to vary the sliding distance or sliding velocity. The sliding wear beahviour was studied using pin-on-disc apparatus against steel counter surface giving emphasis on the parameters such as weight loss as a function of sliding distance and applied load. It was observed from the results that the % weight loss is increases with increase in sliding distance and the load. It is also observed that the % weight loss increases with decreasing the β solution treatment temperature. Form the ANOVA analysis, it revealed that the β solution treatment temperature is not influencing that much on % weight loss as compared to that of load and sliding distance.

Two-body abrasive wear behaviour of AA6061-2SiC-2Gr hybrid nanocomposite fabricated through ultrasonically assisted stir casting

2019 ◽  
Vol 53 (15) ◽  
pp. 2165-2180 ◽  
Author(s):  
A Prasad Reddy ◽  
P Vamsi Krishna ◽  
RN Rao
Keyword(s):  
Wear Rate ◽  
Base Alloy ◽  
Normal Load ◽  
Stir Casting ◽  
Hybrid Nanocomposites ◽  
Wear Behaviour ◽  
Hybrid Nanocomposite ◽  
Pin On Disc ◽  
Aa6061 Aluminium Alloy ◽  
Sliding Distance

Two-body abrasion wear rate of AA6061 aluminium alloy, AA6061-2SiC nanocomposite, and AA6061-2SiC-2Gr hybrid nanocomposites were studied using a pin on disc machine at various applied normal loads 5-20 N and 50-150 µm abrasive grit size by maintaining a constant sliding distance of 120 m. Morphology of fabricated materials, worn surfaces of tested specimens, and abrasive grit papers were analysed under a scanning electron microscope. The wear rate of the AA6061-2SiC-2Gr hybrid nanocomposite was found to be less than that of AA6061 alloy and AA6061-2SiC nanocomposite. The wear rate decreased by 19% for 50 µm, 28.2% for 100 µm, and 22.5% for 150 µm at an applied normal load of 20 N and 120 m sliding distance for Al 6061-2SiC-2Gr hybrid nanocomposite compared to base alloy.

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