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2022
This chapter discusses two important issues relating to driving. The first concept is mental load. Mental load is a central concept to understand driving performance: if drivers experience high mental load, driving performance may deteriorate and safety may be jeopardised.
Chen, Fang, Terken, Jacques
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This chapter discusses two important issues relating to driving. The first concept is mental load. Mental load is a central concept to understand driving performance: if drivers experience high mental load, driving performance may deteriorate and safety may be jeopardised.
Chen, Fang, Terken, Jacques
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FATIGUE CRACK GROWTH UNDER ULTRASONIC FATIGUE LOADING
Fatigue & Fracture of Engineering Materials & Structures, 1997Abstract— In this paper, a stress and modal analysis of an ultrasonic vibration system consisting of a notched specimen and one or two amplifying horns have been performed by using 3D finite element calculations. The stress intensity factors in ultrasonic fatigue crack propagation are evaluated by means of displacement and energy approaches.
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On Structural Fatigue Under Random Loading
Journal of the Aeronautical Sciences, 1954The stress spectrum and equivalent fatigue stress of a structure subjected to a random loading are determined on the approximation of a single degree of freedom and the hypothesis of cumulative damage. The results are applied to the development of a similarity expression for the probable value of the equivalent fatigue stress for a panel subjected to ...
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Biodegradation of polyurethane under fatigue loading
Journal of Biomedical Materials Research Part A, 2003AbstractA method utilizing expansion of a diaphragm‐type film specimen was developed to study in vitro biodegradation of poly(etherurethane urea) (PEUU) under conditions of dynamic loading (fatigue). A finite element model was used to describe the strain state, which ranged from uniaxial at the edges of the film to balanced biaxial tensile strain at ...
Michael J, Wiggins +2 more
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Load-increasing fatigue test to characterize the interface of composites under fatigue loadings
Journal of Materials Science, 2003The effect of glass-fiber epoxy interface in cross-ply reinforced composites on the fatigue behavior is studied by using load-increasing fatigue test. The damage as measured by stiffness reduction is more significant for the composites with poor bonded fibers as was found for EP sized ones, dependent on test conditions.
J. Gassan, T. Dietz
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Description of Fatigue Loading
2014Fatigue is defined as a process of cycle by cycle accumulation of damage in a material undergoing fluctuating stresses and strains (Almar-Naess, 1985). A significant feature of fatigue is that the load is not large enough to cause immediate failure. Instead, failure occurs after a certain number of load fluctuations have been experienced, i.e.
Weicheng Cui, Xiaoping Huang, Fang Wang
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Fatigue Maps and Mean Load Dependences
1992The influence of mean stress on fatigue life has been investigated for IN 792 at 800° C The results and their interpretation are reported. For the application of a life prediction model, a suitable input parameter has been determined on the basis of the experimental results obtained. Lastly, a creep-fatigue map is illustrated for IN 792 at 800° C.
DEL PUGLIA, ALDO +2 more
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Nature, 1961
IT is often necessary to deduce the endurance of metals under a random succession of loads of varying magnitude from the behaviour of specimens tested with stress cycles of constant amplitude. One way of doing this is to use the cumulative damage law, whieh may be written: where N
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IT is often necessary to deduce the endurance of metals under a random succession of loads of varying magnitude from the behaviour of specimens tested with stress cycles of constant amplitude. One way of doing this is to use the cumulative damage law, whieh may be written: where N
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Aircraft Engineering and Aerospace Technology, 1962
This preliminary investigation has shown that the programme load method of testing provides more useful information than single load level tests enabling a more reliable estimate of a structural joint fatigue life to be obtained.
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This preliminary investigation has shown that the programme load method of testing provides more useful information than single load level tests enabling a more reliable estimate of a structural joint fatigue life to be obtained.
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Stahlbau, 2014
AbstractOffshore wind turbines are subject to dynamic excitation from wave loads. Especially when monopile substructures are used, significant fatigue loads can be induced by waves, which are then governing the design. Calculations in the frequency domain are very efficient to compute such wave induced loads and by applying some simplifications, very ...
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AbstractOffshore wind turbines are subject to dynamic excitation from wave loads. Especially when monopile substructures are used, significant fatigue loads can be induced by waves, which are then governing the design. Calculations in the frequency domain are very efficient to compute such wave induced loads and by applying some simplifications, very ...
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