Sökning: "coefficient of restitution"

Hittade 4 avhandlingar innehållade orden coefficient of restitution.

  1. 1. Snow contamination of cars: Collisions of ice particles with surfaces

    Författare :Tobias Eidevåg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ice adhesion; Snow adhesion; coefficient of restitution; particle impacts; premelting; radar blockage;

    Sammanfattning : Seasonal snow cover on roads causes car accidents that lead to human suffering and economic loss. Snow cover decreases visibility and road-tire friction. Advanced active safety systems have been developed to cope with sudden changes in driving conditions and have been engineered to act as quickly as possible. LÄS MER

  3. 2. Understanding Adhesive Mixtures for Inhalation : Particle Dynamics Modelling and Segregation Experiments

    Författare :Sohan Sarangi; Göran Frenning; Göran Alderborn; Kyrre Thalberg; Johannes Khinast; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; inhalation; adhesive mixtures; dry powder inhaler; discrete element method; segregation; stability; modeling; Galenisk farmaci; Pharmaceutics; Farmaceutisk vetenskap; Pharmaceutical Science;

    Sammanfattning : Pulmonary route has been used as a source of drug delivery to lungs for centuries. Drugformulation decides the type of inhaler devices such as pressurized metered-dose inhalers(pMDIs), nebulizers and dry powder inhalers (DPIs). LÄS MER

  4. 3. Simplified mechanical models for the nonlinear dynamic analysis of elasto-plastic steel structures impacted by a rigid body

    Författare :Piseth Heng; Jean-Marc Battini; Mohammed Hjiaj; Bassam Izzuddin; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Byggvetenskap; Civil and Architectural Engineering;

    Sammanfattning : Buildings subjected to impact and explosion are usually studied using large scale and highly nonlinear finite element model which are time-consuming. The first part of the thesis deals with the development of simple and accurate models for evaluating the nonlinear inelastic behaviour of steel frame structures subjected to impact. LÄS MER

  5. 4. On Contact Mechanisms and Mechanical Transmission Performance

    Författare :Lars Maclennan; Maskinelement; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; hydraulics; Mechanical engineering; artificial neural network; experimental study; disc brake; dynamic analysis; shaft; Spur gear;

    Sammanfattning : This thesis consists of four papers, which treat the modelling of a spur gear set and a disc brake, and the interaction between the machine elements. Features of the performance are studied in relation to the initial stated assumptions. LÄS MER