Results 31 to 40 of about 919,764 (280)

Reliability-based analysis and design of strip foundations against bearing capacity failure [PDF]

open access: yes, 2008
International audienceThis paper presents a reliability-based approach for the analysis and design of a shallow strip footing subjected to a vertical load with or without pseudostatic seismic loading.
Low, Bak Kong   +2 more
core   +4 more sources

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria [PDF]

open access: yes, 2018
Purpose. Limestone and marble are carbonate rocks with several structural and engineering applications. The physical and mechanical properties of the rocks are fundamental as they determine their suitability for various use.
Idris, M.A.
core   +1 more source

Adhesive friction at the contact between rough surfaces using n-point asperity model

open access: yesEngineering Science and Technology, an International Journal, 2015
The paper describes a theoretical study of adhesive friction at elastic–plastic contact of rough surfaces based on n-point asperity model. Well defined adhesion index and plasticity index are used to study the prospective situations arising out of ...
Ajay K. Waghmare, Prasanta Sahoo
doaj   +1 more source

Temperature effect on the mechanical behavior of shale: Implication for shale gas production

open access: yesGeosystems and Geoenvironment, 2022
Deformational shale attributes such as fracture toughness, tensile strength, and axial point load strength (PLS) index under elevated temperatures are crucial for the petroleum and gas industries. Here, an attempt has been made to investigate the thermal
Vikram Vishal   +4 more
doaj   +1 more source

The creep behavior of simple structures with a stress range-dependent constitutive model [PDF]

open access: yes, 2012
High temperature design remains an issue for many components in a variety of industries. Although finite element analysis for creep is now an accessible tool, most analyses outside the research domain use long standing and very simple constitutive models
Boyle, James
core   +1 more source

Characterization of rock material by point load strength index test and direct cut

open access: yesMinerva, 2021
The objective of this work is to establish a relationship between the cutting time in rocks, determining a speed and the point load strength index test, Is (50), to characterize the rock in terms of resistance and avoid sending samples to laboratories. As a first stage, on andesite samples, 5 x 5 x 10 cm test tubes were made. After the elaboration they
Ernesto Patricio Feijoo Calle   +1 more
openaire   +2 more sources

Variations of physico-mechanical, mineralogical and geochemical properties of marble under the influence of weathering [PDF]

open access: yes, 2019
Purpose. To investigate the physico-mechanical, mineralogical and geochemical properties variations of Igbeti marble, south-western Nigeria under the influence of weathering. Methods. About twenty representative samples were collected at a varying depth
Lawal, A.I., Ogunsola, N.O., Saliu, M.A.
core   +1 more source

Optimum Weight Selection Based LQR Formulation for the Design of Fractional Order PI{\lambda}D{\mu} Controllers to Handle a Class of Fractional Order Systems

open access: yes, 2013
A weighted summation of Integral of Time Multiplied Absolute Error (ITAE) and Integral of Squared Controller Output (ISCO) minimization based time domain optimal tuning of fractional-order (FO) PID or PI{\lambda}D{\mu} controller is proposed in this ...
Das, Saptarshi   +4 more
core   +1 more source

Observer-biased bearing condition monitoring: from fault detection to multi-fault classification [PDF]

open access: yes, 2016
Bearings are simultaneously a fundamental component and one of the principal causes of failure in rotary machinery. The work focuses on the employment of fuzzy clustering for bearing condition monitoring, i.e., fault detection and classification.
Cabrera, Diego   +6 more
core   +1 more source

Predictive Reliability Assessment of Generation System

open access: yesEnergies, 2020
Due to increasing load and characteristic stagnation and fluctuations of existing generation systems capacity, the reliability assessment of generation systems is crucial to system adequacy. Furthermore, a rapid load increase could amount to a consequent
Martin Onyeka Okoye   +8 more
doaj   +1 more source

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