نتایج جستجو برای: wear profile

تعداد نتایج: 246746  

Journal: :iranian endodontic journal 0
rudra kaul riyaz farooq vibhuti kaul shafayat ullah khateeb aamir rashid purra roopali mahajan

introduction : the aim of the present study was to comparatively evaluate the physical surface changes and incidence of separation in rotary nickel-titanium (niti) instruments using scanning electron microscope (sem). methods and materials: a total number of 210 freshly extracted human maxillary and mandibular first molars were selected and distributed between three groups. three different syst...

2004
Alan Friedman

The following paper will describe a methodology for automatically detecting and diagnosing rolling element bearing wear. The techniques involved have been proven in over 15 years of use in a huge variety of environments, machine types and applications. The techniques involved in diagnosing bearing wear will be described in detail and supported by a set of example graphs and an annotated diagnos...

Journal: :journal of modern processes in manufacturing and production 0
hossein nouri hosseinabadi department of engineering, mechanical department, najafabad branch, islamic azad university, najafabad, iran masoud farahnakian department of engineering, mechanical department, najafabad branch, islamic azad university, najafabad, iran

nowadays the surface texturing has been widely recognized as a usable capability to improve the tribological systems. in this paper, ultrasonic assisted turning (uat) isperformed to create the micro textures on the flat faces. micro surface texturing ismade on the al7075-t6 by the uat in the face turning process. then, the influences of cutting speed feed, vibration direction and vibration ampl...

2017
Fiona Stapleton Thomas Naduvilath Lisa Keay Cherry Radford John Dart Katie Edwards Nicole Carnt Darwin Minassian Brien Holden

PURPOSE This study investigated independent risk factors and causative organisms in microbial keratitis in daily disposable contact lens (CL)-wearers. METHODS A multisite prospective case-control study was undertaken. Cases were daily disposable CL-wearers attending Moorfields Eye Hospital with microbial keratitis and those reported through a one-year surveillance study in Australia and in Ne...

2015
Yuri Martins COSTA André Luís PORPORATTI Priscila Brenner HILGENBERG-SYDNEY Leonardo Rigoldi BONJARDIM Paulo César Rodrigues CONTI

Low pressure Pain Threshold (PPT) is considered a risk factor for Temporomandibular Disorders (TMD) and is influenced by psychological variables. Objectives To correlate deep pain sensitivity of masticatory muscles with prosthetic factors and Oral-Health-Related Quality of Life (OHRQoL) in completely edentulous subjects. Material and Methods A total of 29 complete denture wearers were recruited...

Journal: :Railway Engineering Science 2022

Abstract The development of numerical models able to compute the wheel and rail profile wear is essential improve scheduling maintenance operations required restore original shapes. This work surveys main in literature for evaluation uniform profiles. standard structure these tools includes a multibody simulation wheel–track coupled dynamics module implementing an experimental law. Therefore, a...

In this study, small fraction of NiTi (5 wt%) was added to Yttria stabilized zirconia (YSZ) top coat to improve it sliding wear resistance. The measurement of width of wear tracks after wear tests under a 15 N load for 100 m sliding distances showed that the width of wear track in NiTi-YSZ coating is shorter than that in YSZ coating which depicts the higher wear resistance of NiTi-YSZ coa...

Journal: :international journal of iron & steel society of iran 2009
a. amadeh m. harsij sani h. moradi

ni-w coatings, compared to pure nanocrystalline ni, exhibit higher hardness and wear resistance. in some cases, these coatings are considered as environmental friendly alternatives for hard chromium coating. till now, most of ni-w coatings have been produced by direct current electrodeposition from alkaline baths. in this study square pulse current was used for deposition of ni-w precipitates f...

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