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Lumped-Parameter Modeling of Frontal Offset Impacts
SAE Technical Paper Series, 1995<div class="htmlview paragraph">In the current highway vehicle accident environment a large percentage of fatalities and injuries occur in frontal offset crashes. Computational modeling is being used in support of crashworthiness studies at the National Highway Traffic Safety Administration (NHTSA) to develop an understanding of structural ...
Alexandra C. Carrera +2 more
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Lumped parameter model for chemically amplified resists
SPIE Proceedings, 2004Recently the Lumped Parameter Model (LPM) has been extended to three dimensions enabling fast calculations of full resist profiles. This resist model incorporates most of the lithographically significant physical phenomenon of resist systems. This model works well to match isolated and semi-isolated line resist systems.
Jeffrey D. Byers +2 more
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Lumped Parameter Model for Optical Lithography
1987Publisher Summary As the minimum feature size of integrated circuits (ICs) becomes ever smaller, the importance of process and device modeling becomes more evident. This is never truer than for the process of optical lithography. Lithography models have been used to understand fundamental aspects of photo-resist exposure and development and to study ...
RON HERSHEL, CHRIS A. MACK
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Computer Modeling of Tumor Hyperthermia (A Dynamic Lumped Parameter Model)
1982The thermal behavior of normal and neoplastic tissue is modeled by a set of coupled ordinary differential equations. The equations lump the tissue and tumor into individual compartments, so that the equations are time dependent. These equations represent an initial step in the development of a comprehensive model which may be used in studying the ...
N, Busch, D F, Bruley, H I, Bicher
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Lumped-Parameter Inertia Model for Flexure Hinges
Mechanics Based Design of Structures and Machines, 2004Abstract The article describes the analysis to derive the lumped-parameter inertia properties for variable cross-section flexure hinges for potential use in modeling, designing, and optimizing of these components in the resonant/dynamic range. Inertia fractions corresponding to one of the flexure's 6 degrees of freedom are formulated for single-, two-,
Nicolae Lobontiu, Ephrahim Garcia
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Lumped Parameter Model of Planetary Gear Systems
Proceedings of the Institution of Mechanical Engineers, 1978A model system is described by parameters for shafts, planetary gear trains and nodes. Moments of inertia, spring stiffnesses and damping coefficients are assigned to the shafts; gear ratios and efficiencies are assigned to planetary gear trains. The equivalence of angular velocities and torques is demonstrated for shafts (vibration model), as well as
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3D lumped parameter model for lithographic simulations
SPIE Proceedings, 2002Simplified resist models are desired for fast simulation of resist profiles over large mask areas. The Lumped Parameter Model was originally developed as one such model. However, the LPM model has been limited to 2D resist simulations of 1D aerial image slices with positive tone resists.
Jeff D. Byers +2 more
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Assessment of lumped-parameter models for rigid footings
Computers & Structures, 2010The quality of consistent lumped-parameter models of rigid footings is examined. Emphasis is put on the maximum response during excitation and the geometrical damping related to free vibrations. The optimal order of a lumped-parameter model is determined for each degree of freedom, i.e.
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Lumped parameter models for adhesive contact mechanics
International Journal of Advances in Engineering Sciences and Applied Mathematics, 2020Adhesion is very common when the nanoscale or microscale solids come into contact, thus playing an important role in a variety of situations of interest. Due to the special nature of these problems, computational methods are often superior to analytical and experimental techniques for problems in adhesive contact mechanics.
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