Search for dissertations about: "Failure modes"

Showing result 21 - 25 of 137 swedish dissertations containing the words Failure modes.

  2. 21. Contribution to Numerical and Experimental Studies of Flutter in Space Turbines. Aerodynamic Analysis of Subsonic or Supersonic Flows in Response to a Prescribed Vibratory Mode of the Structure

    Author : Hakim Ferria; Pascal Ferrand; Torsten Fransson; François Moyroud; France Ecole Centrale de Lyon Laboratoire de Mécanique des Fluides et d'Acoustique; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flutter; space turbine; LRANS computation; flutter measurement; shock wave boundary layer interaction; blisk; cut-on cut-off condition; interblade phase angle; combined modes;

    Abstract : Modern turbomachines are designed towards thinner, lighter and highly loaded blades. This gives rise to increased sensitivity to flow induced vibrations such as flutter, which leads to structure failure in a short period of time if not sufficiently damped. READ MORE

  4. 22. Efficiency of aerobic exercise training in women and men with chronic heart failure

    Author : Raija Tyni-Lenné; Karolinska Institutet; Karolinska Institutet; []
    Keywords : aerobic exercise training; blood lactate; chronic heart failure; exercise capacity; gender; health-related quality of life; physical training; plasma norepinephrine; rehabilitation; skeletal muscle; walking performance;

    Abstract : The syndrome of heart failure is one of the major public health problems in many countries. Despite advances in pharmacological therapy, patients with chronic heart failure (CHF) are characterized by exercise intolerance and a reduced health-related quality of life. READ MORE

  5. 23. On improvement of exercise tolerance in patients with chronic heart failure, with special reference to local muscle training

    Author : Allan Gordon; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Chronic heart failure; creatine; exercise capacity; local muscle training; skeletal muscle; ;

    Abstract : Reduced heart pump function and skeletal muscle abnormalities are considered important determinants for the low physical exercise capacity in chronic heart failure. Because of reduced ventricular function, traditional physical rehabilitation with whole body training may cause under perfusion and low local work intensity, thereby producing suboptimal conditions for skeletal muscle training. READ MORE

  6. 24. Application of cohesive modeling in joining technology

    Author : Saeed Salimi; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rivet joints; mixed-mode cohesive failure; mixed material; J-integral; Thick adhesive layer;

    Abstract : ABSTRACTThis thesis summarizes the development of cohesive modeling of joints. It presents some new developments regarding the effects of non-zero thickness of adhesive layers and a novel approach of using the concept of cohesive modeling to characterize the failure behavior of rivet joints. READ MORE

  7. 25. Paediatric intensive care in Sweden : i mechanical ventilation and central haemodynamics : ii outcome of paediatric intensive care with special reference to respiratory failure

    Author : Ninna Gullberg; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The ABC of acute care is to maintain Airway, Breathing and Circulation or oxygen delivery, which depends on the product of cardiac output (CO) and oxygenation. Thus knowledge of how different modes of mechanical ventilation affect central haemodynamics is essential. READ MORE