... Fatigue life predictions associated with the S-N curve have been largely based on empiricism or unfounded theories, or both, due to the complexity involving multiple variables such as fatigue life, applied stress, number of loading cycles, and stress ratio. A damage model proposed by Palmgren...

... The dual-equilibrium desorption (DED) model was introduced in 2002 illustrating the apparent biphasic nature of desorption of contaminants from soil. This model was applied to a gasoline fueling station investigation in northwestern California in which it was tested against empirical data...

... to provide this focus through a conceptual framework for understanding how the melting rate (of solid fuel) is determined and regulated during heterogeneous burning. In this paper, the proposed conceptual model is shown to be both (a) consistent with known trends and previously observed results, and (b...

... A model has been developed explaining 92 % of the variance in spray retention by individual plants. The effects of formulation and plant morphology were represented as a logistic function, because this can accommodate retention close to 100 or 0 % whereas an additive model cannot. All inputs...

... The verification of the cleanup of dune sands from a dissolved phase petroleum hydrocarbon plume at an active service station site undergoing ozone treatment is being accomplished through soil and groundwater sampling. We hope to use modeling by the dual-equilibrium desorption (DED) model...

... In modern day toxicology, problems arise in modeling complex ecosystems, such as the Columbia River system. There remain an abundance of models for which responsibility of assumptions is unaccounted and between which cohesion lacks. Models should be evaluated independently, taking into mind...

... by a simple equivalent yield stress model. These results also suggest that size and geometry effects, which mediate constraint, can be modeled by combining local critical stressed area σ*/A* fracture criteria with finite element method simulations of crack tip stress fields. The fundamental understanding...

... Physically based models for predicting the source and sink behavior of homogeneous, diffusion-controlled polymer materials are described. The source model was initially developed to interpret emissions of volatile organic compounds (VOCs) from the polymer backing of new carpets measured...

... individual sand and gravel zones. The discontinuous lithology of Santa Clara Valley Basin, coupled with the sometimes minimalist lithologic logs provided by water well drillers, frustrate our attempts to use geology as a surrogate for defining the hydrostratigraphy and resultant model layers. Our...

... A three-dimensional ground water flow model was developed and calibrated for use as a quantitative tool for the evaluation of several potential ground water remedial alternatives during the On-Post Feasibility Study for the Rocky Mountain Arsenal. The USGS MODFLOW code was implemented...

... in the application. A mass balance model for a storage application is described. A mathematical model was developed and is presented. This model calculates an estimate of the amount of CIPC in the vented aerosol and the amount of CIPC in the air of a storage. Putting typical “old” application conditions...

... An overall approach to life prediction of a component undergoing localized corrosion involving initiation and repassivation is considered. A crevice corrosion initiation model for Fe-Ni-Cr-Mo alloys is presented in this paper. This is a finite difference model that considers the combined effects...

... A menu-driven ventilation model for a personal computer was developed that is capable of determining the distributions of time-averaged, two-dimensional, steady-state flow fields and particulate or gaseous contaminants under isothermal conditions for a given particulate/gaseous diffusion...

... A simplified model of cement attack by pure water or undersaturated lime solutions is proposed for long-term predictions of concrete degradation. The degradation is modeled by ionic diffusion in the cement pores coupled with mass exchange between the solid and aqueous phases. The local...

...) are explained in the context of this model, and the technique is applied to two experimental systems, one entailing seven reactions with twenty-four parameters which were fit to the model via a regressive procedure. electrode model polarization multi-reaction Owen F. Devereux i and Kook Sun Yeum 2...

... This paper describes a stochastic system model that was developed to represent the dynamic interaction between human behavior and fire growth and spread in highrise apartment buildings. The effects of the smoke and fire spread are calculated in terms of two performance parameters: the expected...

... Corrosion models are generally able to provide satisfactory predictions of inreactor performance. Nevertheless, in order to emphasize the theoretical or empirical aspects of the corrosion process and to improve the accuracy of models, the major objectives of the present study are: • To provide...

... A total system approach should be used to simulate the shelf life of packaged food products. The main advantage of modelling the product-packaging-distribution system is in helping to make proper decisions during product and packaging development. food packaging shelf life model system...

.... fatigue damage nonlinear assessment model history-dependent damage postulate similitude B. N. Leis^ A Nonlinear History-Dependent Damage Model for Low Cycle Fatigue REFERENCE: Leis, B. N., "A Nonlinear Hbtoiy-Dependent Damace Model for Low Cycle Fatigue," Low Cycle Fatigue, ASTMSTP 942, H. D...

... data confirm that cyclic shear strain is the fundamental parameter governing pore pressure buildup, because strain-controlled tests essentially eliminate the influence of specimen fabric and sample disturbance. Also, the results indicate that the cyclic triaxial test can be used to model cyclic simple...