Results 221 to 230 of about 351,149 (262)
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VIBRATION PARAMETERS FOR DAMAGE DETECTION IN STRUCTURES
Journal of Sound and Vibration, 2002The aim of this paper is to examine how damage indicators are sensitive to changing number of frequencies and mode shapes and also to number and location of measurement points. The influence of measurement errors was also analyzed for all cases. For the analysis, those damage indicators are chosen which use changes in such modal parameters as natural ...
M. PALACZ, M. KRAWCZUK
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A fatigue damage evaluation using local damage parameters for an offshore structure
Proceedings of the Institution of Civil Engineers - Maritime Engineering, 2020The fatigue design of offshore structures normally uses wave and wind fatigue loading. Currently, fatigue analyses for fatigue damage accumulation assessments of this type of structure are based on signal–noise (S–N) curves for welded structural components, the hot-spot stress approach and the Palmgren–Miner law – according to design codes.
António Mourão +7 more
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Identification of damage parameters for jointed rock
Computers & Structures, 2002An algorithm for parameter identification based on the finite element method is proposed in this paper. It follows the main idea of the dual boundary control method, but introduces some modifications to improve its stability. This improvement is illustrated with a simple example.
Zhihai Xiang +2 more
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Determination of basic parameters for damage correlation
Journal of Nuclear Materials, 1991Abstract Simulation irradiation aims at predicting the radiation damage to be produced in the fusion reactor. Basic processes governing the individual damage evolution are the recoil-induced atomic mixing, the production rate of single defects and the effective concentration of point defect sinks.
H. Wollenberger, V. Naundorf
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Variation of Radiation Damage Parameters in Metals
Physical Review, 1962Electron damage measurements bave previously been used to obtain values for the average threshold energies and for the electrical resistivities of Frenkel pairs in a number of metals. It is shown that there is an empirical correlation between the point defect resistivities so obtained and the normal, high-temperature electrical resistivities of ...
P. G. Lucasson, R. M. Walker
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The Damage Voltage Calculation of ESD based on Damage Parameters of Square wave
The 2006 4th Asia-Pacific Conference on Environmental Electromagnetics, 2006In the short pulse region, the knot surface breakdown is the chief damage that was induced by the electromagnetic pulse to the electronic devices. The power that leads the devices damaged relates with the pulse width. Electrostatic discharge (ESD) is a course with high electric potential and instantaneous large current, and ESD breakdown of the ...
Lin Yong-tao +2 more
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Improved calculation method of damage parameter in viscoelastic continuum damage model
International Journal of Pavement Engineering, 2010Modelling the performance of asphalt concrete using continuum damage theories is an approach that has gained international attention in recent years. These types of models are advantageous because they ignore many of the complicated physical interactions at the microscale level and instead characterise a material using macroscale observations. One such
B. Shane Underwood +2 more
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Microstructural parameters for creep damage quantification
Acta Metallurgica et Materialia, 1991This paper is concerned with the use of mechanistically based parameters that can be used to quantify cavitation creep damage for the purpose of life assessment of high temperature components. They are referred to as “line parameters” in that they relate the number of damaged grain boundaries intersected by or very close to a reference line to the ...
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Application of Wavelet Parameters for Impact Damage Detection in Plates
Key Engineering Materials, 2013This study proposes a new nondestructive evaluation methodology named laser lock-in thermography (LLT) for fatigue crack detection. LLT utilizes a high power continuous wave (CW) laser as a heat generation source for lock-in thermography instead of commonly used flash and halogen lamps.
Shelley, T. J., Liew, C. K.
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Identification and measurement of ductile damage parameters
The Journal of Strain Analysis for Engineering Design, 1999The possibility of extending fracture mechanics concepts and design criteria to ductile failure is an issue that has attracted the attention of many researchers. Many models that address this are available nowadays. For these, two kinds of approach are widely used: the porosity-based model proposed by Gurson and the continuum damage mechanics (CDM ...
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