Results 151 to 160 of about 517 (169)
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Biosystems Engineering, 2021
Determination of soil precompression stress (σp) from compression curves has markedly changed in recent decades, with several available methods of varying complexity. The graphical procedure proposed more than eight decades ago remains a standard, though it is now emulated by statistical and numerical procedures.
Tassinari, Diego +6 more
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Determination of soil precompression stress (σp) from compression curves has markedly changed in recent decades, with several available methods of varying complexity. The graphical procedure proposed more than eight decades ago remains a standard, though it is now emulated by statistical and numerical procedures.
Tassinari, Diego +6 more
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, 2012 Geoderma, 2021
Abstract Wetting and drying are common processes in agricultural soils, which change particle rearrangement, cementation and related properties. Some recent studies have noted that soil precompression stress (σp) – the soil capacity to support stress – can be affected by wetting and drying cycles and should be seen as state variable instead of a soil
André Somavilla +4 more
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Abstract Wetting and drying are common processes in agricultural soils, which change particle rearrangement, cementation and related properties. Some recent studies have noted that soil precompression stress (σp) – the soil capacity to support stress – can be affected by wetting and drying cycles and should be seen as state variable instead of a soil
André Somavilla +4 more
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Research on Concrete Vertical Precompressive Stress Field at Webs of Box Girder Bridge
Journal of Highway and Transportation Research and Development (English Edition), 2009Based on Fourier series, an analytic formula for analyzing the prestress in the web of box girder with single bar was deduced through simplifying the action of single vertical prestress bar as a couple of concentrated forces with equal value but opposite direction acting on a thin rectangular board with infinite length.
Mingyan Shen, Xingu Zhong, Xiaojuan Shu
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Geoderma Regional, 2020
Abstract This study was designed to measure the variation of precompression stress (σp) with initial bulk density and initial water content and to propose pedo-transfer functions to estimate σp for two Brazilian no-till Oxisols. Undisturbed soil cores were randomly sampled (to obtain an as large as possible variation in bulk density) from two soils ...
Edwardo A.S. Mendonça +5 more
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Abstract This study was designed to measure the variation of precompression stress (σp) with initial bulk density and initial water content and to propose pedo-transfer functions to estimate σp for two Brazilian no-till Oxisols. Undisturbed soil cores were randomly sampled (to obtain an as large as possible variation in bulk density) from two soils ...
Edwardo A.S. Mendonça +5 more
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Soil precompression stress assessed from linear scale stress and strain
The seemingly never-ending increase in the size and hence weight of agricultural machinery induces an urgent need for tools to evaluate the risk of subsoil compaction. The scientific community is fully aware of this as witnessed by a large number of papers addressing soil strength across soil textures, drainage conditions and other drivers of the ...Mathieu Lamandé +3 more
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Stress corrosion cracking of Al-Mg-Zn-Cu alloys after precompression
Journal of Materials Science, 1981Stress corrosion cracking (SCC) experiments have been carried out on double-cantilever-beam (DCB) specimens of 7017-T651 aluminium alloy. The specimens were first subjected to a known compressive load which caused plastic deformation at the notch tip.
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Strength of Materials, 2019
The fatigue life prediction method for structure elements with the material precompression in the hole vicinity is proposed. The method is a further step in evolving the approach to life prediction from a local stress-strain state that is based on the energy criterion of fatigue fracture.
P. A. Fomichev, A. V. Zarutskii
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The fatigue life prediction method for structure elements with the material precompression in the hole vicinity is proposed. The method is a further step in evolving the approach to life prediction from a local stress-strain state that is based on the energy criterion of fatigue fracture.
P. A. Fomichev, A. V. Zarutskii
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Soil and Tillage Research, 2016
Abstract Compaction of the subsoil due to heavy traffic in moist and wet soil is widespread in modern agriculture. The objective of this study was to quantify the effects from realistic field traffic on soil penetration resistance and barley crop yield for three Luvisols developed from glacial till.
Per Schjønning +4 more
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Abstract Compaction of the subsoil due to heavy traffic in moist and wet soil is widespread in modern agriculture. The objective of this study was to quantify the effects from realistic field traffic on soil penetration resistance and barley crop yield for three Luvisols developed from glacial till.
Per Schjønning +4 more
openaire +2 more sources