Sökning: "friktionskoefficienten"

Visar resultat 1 - 5 av 23 uppsatser innehållade ordet friktionskoefficienten.

1. 1. Additives in a steam engine to decrease friction : Friction testing of solid lubricants in powder form

   Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

   Författare :Viktor Lange; [2023]
   Nyckelord :Tribology; friction; wear; steam; steam engine; ranotor; invencon; invencon AB; steel; contact mechanics; hexagonal boron nitride; molybdenum disulfide; tungsten disulfide; lubricants; solid lubricants; Tribologi; friktion; nötning; ånga; ångmotor; stål; kontaktmekanik; smörjning; smörjmedel; fasta smörjmedel;

   Sammanfattning : This thesis aims to investigate the coefficient of friction between steel on steel contacts with the addition of solid lubricants such as h-BN, WS2, MoS2 in powder form, in dry conditions and wet conditions. More specifically, the purpose is to enhance the sliding between the piston rings and cylinder block in a modern high temperature steam engine developed by RANOTOR. LÄS MER

3. 2. Impact of Frame Stiffness on Tribological Behaviour of Sliding Interfaces

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Nisha Singh; [2023]
   Nyckelord :coefficient of friction; friction-vibration interaction; stiffness; tribometer; vibrations; friktionskoefficient; friktion-vibrationsinteraktion; styvhet; tribometer; vibrationer;

   Sammanfattning : Friction and wear have been concerns to industrialists, scientists and environmentalist for several decades. Many robust models have been developed to address friction and wear and their dependency on various parameters. Numerous experiments have been conducted in the past to model friction and wear. LÄS MER

4. 3. Improvement and verification of a pin-on-disc tribometer with variable speed and load

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Valentine Lin; [2023]
   Nyckelord :tribometer; friction; tribometer; friktion;

   Sammanfattning : The use of threaded fasteners can be found throughout the manufacturing industry due to their simplicity. When tightening a threaded fastener, the goal is to reach a desired clamping force. However, the clamping force is not directly measurable in production environments and the tightening torque is instead used to estimate the clamping force. LÄS MER

5. 4. Modeling of a ball contact with a coated plate

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Mohammadreza Saeedi; [2023]
   Nyckelord :Pin on disc tribometer; coating; contact mechanics; finite element method; tribology; Pin on disc tribometer; beläggning; kontaktmekanik; finita elementmetod; tribologi;

   Sammanfattning : During tightening of a screw, the variation in friction will affect the force acting on the joint, especially when tightening using torque as a control parameter. So, it is crucial to have a proper understanding of the contact mechanism and friction in the screw head to joint and thread interfaces. LÄS MER

7. 5. New design and construction of hightemperature tribology testingequipment : in the context of hard coatings

   Master-uppsats, Karlstads universitet/Avdelningen för maskin- och materialteknik

   Författare :Atle Andersson Nykvist; [2023]
   Nyckelord :Tribology; friction; wear; hot wear; hot wear tester; design; construction; tribometer; tribo tester; tribo-tester; Tribologi; friktion; nötning; varmnötning; varmnötare; design; konstruktion; tribometer; tribotest;

   Sammanfattning : There are two main goals of this thesis. Firstly, to improve and develop an existing hot weartester at Karlstad University so that it may test more samples of different sizes. Secondly, totest previously impossible samples and investigate their tribological properties and measurethe coefficient of friction with high reproducibility. LÄS MER