An Experimental Study of the Wear Characteristics of Tubulars Made from Corrosion-Resistant Alloys

2021 ◽  
pp. 1-8
Author(s):  
Andreas Teigland ◽  
Sigbjørn Sangesland ◽  
Stein Dale ◽  
Bjørn Brechan
Keyword(s):  
Correction Factor ◽  
Corrosive Wear ◽  
Linear Wear ◽  
Corrosion Resistant ◽  
Wear Characteristics ◽  
Wear Calculation ◽  
Work Relationship ◽  
Series Of Experiments ◽  
Casing Wear ◽  
Materials Used

Summary Casing wear is the process of progressive loss of wall thickness owing to relative motion between the drillstring and casing. The amount of casing wear depends on conditions, such as the downhole forces, the accumulated time of contact between drillstring and casing, and the materials used. This process is complex and involves abrasive, adhesive, and corrosive wear mechanisms that are difficult to predict. To deal with the complexity of the conditions, a simple but effective wear model is used in the industry to estimate tubular wear in drilling and intervention operations. The model is based on abrasive and adhesive wear, and the effects of corrosion are not considered. In addition, an empirical part of the model known as the correction factor is based exclusively on experimental carbon-steel test data. Tubulars made of corrosion-resistant alloys (CRAs) are known to exhibit abnormal wear characteristics. A series of experiments has been designed and performed to investigate the wear characteristics of CRAs. These experiments resulted in excessive wear factors for the CRA casing samples, demonstrating their susceptibility to wear. This study finds that omitting the correction factor from the calculation procedure can greatly improve wear estimates for some CRAs. Removing the correction factor results in a linear wear-work relationship that reflects the actual wear trends from test results. However, further studies are needed to confirm correction factors and more accurate wear calculation procedures for CRA tubulars in general.

Wear Characteristics of Conventional and Squeeze-Film Artificial Hip Joints

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
S. Boedo ◽  
S. A. Coots
Keyword(s):  
Implant Design ◽  
Squeeze Film ◽  
Linear Wear ◽  
Wear Depth ◽  
Element Analysis ◽  
Wear Characteristics ◽  
Wear Rates ◽  
Cycle Loading ◽  
Artificial Hip Joints ◽  
Elastic Elements

This paper investigates the wear characteristics of a novel squeeze-film hip implant design. Key features of the design are elastic elements attached to the cup which provide a mechanical means for ball separation during the swing phase of the gait loading cycle. An Archard-based wear formulation was implemented utilizing the ansys finite element analysis program which relates contact pressure and sliding distance to linear wear depth. It is found that low-modulus elastic elements with bonded high-modulus metal coatings offer significant predicted improvement in linear and volumetric wear rates when compared with conventional implant geometries for gait cycle loading and kinematic conditions found in practice.

Development and Validation of a Finite Element Model of Wear in Uhmwpe Liner Using Experimental Data From Hip Simulator Studies

2021 ◽  
Author(s):  
Nihal Kottan ◽  
Gowtham N H ◽  
Bikramjit Basu
Keyword(s):  
Finite Element ◽  
Femoral Head ◽  
Wear Rate ◽  
Contact Pressure ◽  
Correction Factor ◽  
Linear Wear ◽  
Maximum Relative Error ◽  
Fe Model ◽  
3D Point Clouds ◽  
Dynamic Wear

Abstract The wear of acetabular liner is one of the key factors determining the longevity and osseointegration of Total Hip Replacement (THR) implants. The long-term experimental measurements of wear in THR components are time and cost-intensive. A finite element (FE) model of a 32 mm Ceramic on Polymer system consisting of ZTA (Zirconia-toughened Alumina) femoral head and UHMWPE (Ultrahigh molecular weight polyethylene) liner was developed to predict the dynamic wear response of the liner. Archard-Lancaster equation, consisting of surface contact pressure, wear rate, and sliding distance, was employed to predict the wear in the liner. The contact pressure and wear at the articulating surface were found to decrease over time. A new computational method involving 3D point clouds from the FE analyzed results were used to construct wear maps. The model was able to predict the linear wear with relative errors ranging from 9% to 36% over 2 million cycles when compared to the published results. The increasing error percentage occurring primarily from the use of a constant wear rate was reduced to a maximum of 17% by introducing a correction factor. Volumetric wear rate was predicted with a maximum relative error of 7% with the implementation of the correction factor. When the model was implemented to study liners of diameters ranging from 28 mm to 36 mm, the linear wear was seen to decrease with an increase in femoral head diameter, which is in agreement with the clinical data.

Use Wear on Bone and Antler Tools from the Mackenzie Delta, Northwest Territories

1994 ◽  
Vol 59 (2) ◽  
pp. 316-334 ◽  
Author(s):  
Genevieve M. LeMoine
Keyword(s):  
Northwest Territories ◽  
Experimental Results ◽  
Fish Scales ◽  
Mackenzie Delta ◽  
Use Wear ◽  
Similar Materials ◽  
Series Of Experiments ◽  
Materials Used ◽  
Historical Accounts ◽  
Lines Of Evidence

A series of experiments making and using bone and antler tools show that functional identifications of these tools can be made with confidence in some circumstances. Using principles from the field of tribology, the experiments demonstrate that different uses leave different microscopic traces on bone and antler. They also show that when the materials used are similar, the wear produced will be similar. In particular, wet materials, including snow, ice, wet hide, and wet antler all produce nearly identical microscopic patterns. Other groups of similar materials, such as bone, antler, and wood, or fish scales and hair, present the same problem. Although differences can be detected, these may not be preserved on archaeological tool specimens. Application of the experimental results to bone and antler tools from the Mackenzie Delta illustrates that functional identifications of tools can be made with confidence, despite the problem of similar microscopic patterns, when other lines of evidence (ethnographic and historical accounts, distribution of wear) are taken into account. When such information is lacking, functional identifications are more difficult and must be made with more caution.

Corrosive-wear characteristics of diamond-coated cemented carbide tools

1999 ◽  
Vol 45 (6) ◽  
pp. 463-469 ◽  
Author(s):  
Takao Morita ◽  
Kaoru Banshoya ◽  
Takahiro Tsutsumoto ◽  
Yasuhide Murase
Keyword(s):  
Corrosive Wear ◽  
Cemented Carbide ◽  
Wear Characteristics ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide

scholarly journals Effect of Temperature Changes on the Vibration Transmissibility of XPE and PE Packaging Cushioning Material

2021 ◽  
Vol 11 (2) ◽  
pp. 482
Author(s):  
Péter Csavajda ◽  
Péter Böröcz
Keyword(s):  
Effect Of Temperature ◽  
Protective Mechanism ◽  
Package Design ◽  
Temperature Changes ◽  
Vibration Stress ◽  
Vibration Transmissibility ◽  
Characterization Of Properties ◽  
Series Of Experiments ◽  
Materials Used ◽  
Protective Packaging

Polyethylene (PE) and its variations are among the most traditional materials used for cushioning in packaging systems. The role of these materials is to prevent damages during handling and distribution processes from physical events such as vibration stress. This study presents new results on the characterization of properties of PE and XPE (cross-linked polyethylene) packaging materials, which have significant relevance as a protective mechanism due to their vibration transmissibility and frequency curve properties. The main goal of this study is the evaluation of vibration transmissibility of PE and XPE cushion material at varied real temperature and static load conditions through a series of experiments using a vibration tester and climate chamber to determine the peak frequencies, vibration transmissibility, and damping ratios. The results can be used by engineers in the package-design process, and can be useful in different distribution conditions. Three different kinds of static loads and a 0.5 oct/min sine sweep of vibration test were used to find the peak frequencies and vibration transmissibility at −20 °C, 0 °C, 20 °C and 40 °C to estimate the damping ratios. The results provided a better understanding of the materials and can assist in the design of suitable protective packaging systems.

Corrosive wear characteristics of bronze friction resisting composites

2013 ◽  
Vol 7 (1) ◽  
pp. 52-59
Author(s):  
Kh A Ragab ◽  
R Abdel-Karim ◽  
M Bournane ◽  
S Farag ◽  
S M El-Raghy ◽  
...  
Keyword(s):  
Corrosive Wear ◽  
Wear Characteristics

scholarly journals Evaluation of the wear characteristics of three different materials used for provisional implant-supported restorations

2021 ◽  
Vol 40 (3) ◽  
pp. 97-106
Author(s):  
Aswana Jaiprakash ◽  
Jayakrishnakumar Sampathkumar ◽  
Chitrashankar Krishnan ◽  
Hariharan Ramasubramanian ◽  
Hariharan Ramakrishnan ◽  
...  
Keyword(s):  
Wear Characteristics ◽  
Materials Used

scholarly journals Experimental study of fractional composition of pieces of brittle material during crushing in a single-roll crusher with block stop on the roll

2020 ◽  
Vol 63 (7) ◽  
pp. 554-559
Author(s):  
A. G. Nikitin ◽  
Yu. A Epifantsev ◽  
K. S. Medvedeva ◽  
P. B. Gerike ◽  
A. R. Fastykovskii
Keyword(s):  
Isotropic Material ◽  
Spherical Shape ◽  
Metallurgical Industry ◽  
Tangential Stresses ◽  
Roll Type ◽  
Cement Mixture ◽  
Series Of Experiments ◽  
Materials Used ◽  
Regular Spherical Shape ◽  
Roll Crusher

Processing of bulk materials used in metallurgical industry to obtain necessary grades of size requires application of crushing machines, including a single-roll type. Indicators of crushing process are degree and efficiency of crushing. Degree of crushing is estimated by the ratio of size of initial crushed and resulting pieces, which depends on size of the gap between a roll and a fixed jaw. The Siberian State Industrial University has patented, designed and manufactured a pilot unit, which is a single-roll crusher with block stop on the roll to study crushing process. A series of experiments on different samples (in shape, size and strength) crushing was carried out on the developed unit. Technique of the experiment and the design of a single-roll crusher with block stop on the roll were described. Results of destruction of the samples of isotropic material made of sand-cement mixture of regular (spherical) shape are presented. Samples from isotropic material allow comparison of analytical conclusions of determining position of the plane of action of maximum tangential stresses with experimental data. Samples of anisotropic material (for example, ferroalloy) were also destroyed. It was experimentally determined that the larger is clearance between the roll and the fixed jaw, the larger is the size of fraction of finished product and over-grinding is less than after crushing the same piece with a smaller clearance. The degree of crushing in a single-roll crusher with block stop on the roll cannot be equal to 4 or more. It was proved that destruction of isotropic materials occurs along the plane of action of maximum tangential stresses. Anisotropic materials are destroyed, depending on size of clearance between a roll and a jaw, both on the plane of action of the maximum tangential stresses and on the planes of least resistance.

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