Essays about: "friction"

Showing result 1 - 5 of 432 essays containing the word friction.

  1. 1. Prediction of life durability in friction for wet clutches of DCT gearboxes

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Lars-Johan Sandström; [2020]
    Keywords : wet clutch; DCT; Gearbox; Durability; Friction; Life; Dual Clutch Transmission;

    Abstract : Many new cars are equipped with automatic transmissions. These gearboxes often have a dual clutch transmission (DCT) that has a built-in wet clutch. The lubricants used in these gearboxes is often very advanced because it must take care of two systems, the wet clutch and the gears. There is always a strive to make the drain intervals longer. READ MORE

  2. 2. Tribology of newly developed EAL versus water in hydropower turbine bearings

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Nayan Dhakal; [2019]
    Keywords : water-based lubrication; hydropower; turbine bearings; environmentally adaptive lubricants; modified water; viscosity modifiers; polyvinylpyrrolidone; poly sodium 4-styrenesulfonate ; UHMWPE; wear;

    Abstract : The increasing demand for more readily bio-degradable, renewable and non-toxic environmentally adaptive lubricants with a lower degree of bioaccumulation has escalated the investigation of water-based lubricants as the potential alternatives for conventional mineral-based oils. Water is an excellent environmentally adapted lubricant; however, it is a low viscous fluid and holds downsides of having corrosive nature and extremely low pressure-viscosity coefficient leading to insufficient load-carrying capacity. READ MORE

  3. 3. Mechanical dry grinding process of saw chain

    University essay from Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap; Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Author : Dennis Svensson; Tobias Falk Svärd; [2019]
    Keywords : dry grinding; abrasive; grinding wheel; grinding disc; grinding wheel; friction; energy; work; chainsaw; saw chain; cutting link; cutting edge;

    Abstract : The cutting links on chainsaws needs to be sharpened regularly to retain its sharpness. The most effective way is to use a machine wheel grinder. However, due to high friction there is a high risk of tempering the steel and damaging the sustainability to wear, resulting in a dull cutting edge. READ MORE

  4. 4. Uses and Issues – The case of Visby Cathedral : An analysis of values and frictions associated with usage at a venue that is both cultural heritage and an active religious institution

    University essay from Uppsala universitet/Institutionen för teknikvetenskaper

    Author : Walter Duphorn; [2019]
    Keywords : ;

    Abstract : This thesis is a case study of Visby Cathedral, cultural heritage with a rich history that has been an active site of worship since medieval times. This has resulted in an interest in the cathedral as a tourist destination which has increased exponentially since the city became a world heritage. READ MORE

  5. 5. Simulation and Analysis of Ultrasonic Wave Propagation in Pre-stressed Screws

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Erik Andrén; [2019]
    Keywords : ;

    Abstract : The use of ultrasound to measure preload in screws and bolts has been studied quite frequently the last decades. The technique is based on establishing a relationship between preload and change in time of flight (TOF) for an ultrasonic pulse propagating back and forth through a screw. READ MORE