Browsing Engineering by Issue Date
Now showing items 1-20 of 1462
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Optimization of the efficiency of stall control using air injection for centrifugal compressors
(Wiley Online Library, 1980-05)A plasticity theory for porous metals is proposed. A simple model of a porous materials is analysed by the finite element method. Small strain elastic–plastic analysis provides stress–strain curves, yield stressed and ... -
A modified plasticity theory for porous metals
(Wiley Online Library, 1980-05)A plasticity theory for porous metals is proposed. A simple model of a porous materials is analysed by the finite element method. Small strain elastic–plastic analysis provides stress–strain curves, yield stressed and ... -
Continuum bases and consistent numerical formulations of nonlinear continuum mechanics problems
(1984)The referential-description, spatial-description, and relative-description formulations in the finite-element approach to continuum-mechanics problems are reviewed and developed. Explicit final incremental equilibrium ... -
Formulation methods of geometric and material nonlinearity problems
(Wiley Online Library, 1984-05)A concise survey of formulation methods of geometric and material nonlinearity problems is given. Differences between existing formulations in the literature are discussed. A consistent Lagrangian and updated Lagrangian ... -
Optimum aeration rates for the suspension of larval feeds
(Elsevier, 1989-01)This short paper explores the suspension of food particles in larval rearing tanks and is concerned in particular with optimum aeration rates for a variety of tank designs and sizes, ranging form 5–1800 litres in volume ... -
Aggregation phenomena in the suspension polymerization of VCM
(Springer, 1989-07-25)In the suspension polymerization of VCM, insoluble polymer particles are formed inside the monomer droplets. The growth and aggregation of these particles are responsible for important polymer properties, such as porosity. ... -
Culture of bacteria in an aerated, rectangular tank reactor
(Blackwell Publishing Ltd, 1991-01)Aerobic bacterial growth was assessed in a simple rectangular vessel with good mixing achieved solely by air flow. Growth became oxygen limited at culture densities below 1·5 mg dry wt/ml, even at maximum air flow and the ... -
237. Unified numerical treatment of hyperelastic and rubber‐like constitutive laws
(Wiley Online Library, 1991-11)A unified numerical treatment for handling various forms of constitutive relations for hyperelastic and rubber-like materials is presented. A general form for the stress and the constitutive tensors is derived. The form ... -
Use of a new glass-fiber rod as reinforcement for concrete structures
(1991-11)The last few years have seen the cost of repairs and rehabilitation of major constructions become an urgent concern. In particular, the ever increasing use of reinforced concrete in corrosive and marine environment for the ... -
Theory and High-Resolution Finite Element Analysis of 2-D and 3-D Effective Permeabilities in Strongly Heterogeneous Porous media"
(Computational Mechanics Pub, 1992)Starting from the premise that Darcy's law applies with a random hydraulic conductivity field K(x) defined on a support ω, we consider steady state flow in a larger domain Ω driven by statistically independent random source ... -
Drying shrinkage strains: experimental versus codes
(ACI, 1992-06)The experimental evaluation of drying shrinkage strains is compared to that based on ACI and Euro-International Committee of Concrete (CEB) recommendations. A 0.16-m 3 concrete block, instrumented with the aid of vibrating ... -
Linear Metal Nanostructures and Size Effects of Supported Metal Catalysts
(American Association for the Advancement of Science, 1992-11-20)Nickel metal catalysts composed of nanometer by micrometer strips have been produced with solid-state microfabrication techniques. The strips are actually the edges of nickelcatalyst thin films, which are sandwiched between ... -
Effective Hydraulic Conductivity of Bounded, Strongly Heterogeneous Porous Media
(American Geophysical Union, 1996)We develop analytical expressions for the effective hydraulic conductivity Ke of a three‐dimensional, heterogeneous porous medium in the presence of randomly prescribed head and flux boundaries. The log hydraulic conductivity ... -
Analytical model for intersection sight distance on 3-d highway alignments
(Transportation Research Board of the National Academies, 1996)Intersection sight distance is the adequate sight distance to be provided at two-way stop controIIed intersection. Current AASHTO poIicy provides an equation and charts for the required at-grade intersection sight distance ... -
Recent advances in the numerical modeling of constitutive relations
(Elsevier, 1996)In this paper we present an overview of the recent developments in the area of numerical and finite element modeling of nonlinear constitutive relations. The paper discusses elastic, hyperelastic, elastoplastic and ... -
Thermophilic bacteria in UAE environment can enhance biodegradation and mitigate wellbore problems
(OnePetro, 1998-11)Several strains of thermophilic bacteria were isolated from the environment of the United Arab Emirates. These bacteria show extra ordinary resistance to heat and have their maximum growth rate ranging from 45C to 80C. ... -
Multiple decision-making criteria in the transport and burial of hazardous and radioactive wastes
(Springer-Verlag, 1999)We evaluate the application of various statistical measures for the identification of optimal financial strategies in environmental projects that may be burdened by the consequences of low-probability, high-cost events. ... -
Assessing Risk Retention Strategies for Environmental Project Management
(Geo science world, 1999)Environmental companies face the risk of liability claims that can, significantly, affect their resources and financial future. At the same time most small- and medium-sized companies do not rely on sophisticated risk-management ... -
Environmental risk and liability management and its influence on profitability
(Wiley online library, 1999)Managing environmental risk and liability for corporations and consultants requires a prudent combination of insurance techniques, company risk control plans, pollution prevention, and the proper allocation of retention ... -
Use of thermophilic bacteria for bioremediation of petroleum contaminants
(Taylor and Francis, 1999)Several strains of thermophilic bacteria were isolated from the environment of the United Arab Emirates. These bacteria show extraordinary resistance to heat and have their maximum growth rate around 60 80 C. This article ...