Results 31 to 40 of about 31,902 (254)
Modelling Minimum Flow Rate Required for Unloading Liquid in Gas Wells [PDF]
SPE Nigeria Annual International Conference and Exhibition, 2020 Abstract Liquid loading in gas well has been an interest in the Oil and Gas sector due to the reduction of ultimate recovery and also the reduction of production from such wells. Several authors have presented various models for predicting the beginning of liquid loading in a gas well, yet there are regular errors in the model outcomes ...
Adesina Fadairo +4 more
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Meikuang Anquan, 2020 Taking the natural coal drilled from C1 coal bed of a coal mine of Sichuan Coal Group Furong Company as research object, we investigated the mechanical and permeability characteristics of raw coal under different loading-unloading stress conditions based
JIANG Changbao, WEI Aidong, CHEN Yufei, WANG Pei
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Advances in Materials Science and Engineering, 2018 Uniaxial cyclic loading-unloading compression experiments with schemes of six loading rates and six unloading rates were carried out on the combined testing platform. Impact of loading and unloading rates on rock AE characteristics was revealed.
Mingwei Zhang +4 more
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Advanced Engineering Materials, EarlyView.Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
Karl Popper and the Mechanisms of Hydrogen Embrittlement
Advanced Engineering Materials, EarlyView.Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
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Shuili Shuiyun Gongcheng Xuebao, 2017 The strength and deformation characteristics of mudstone are important reference indexes in the engineering design and construction management. In order to analyse the effect of water-rock interaction and unloading on the strength properties and ...
MA Furong, ZHANG Xingui, YI Nianping
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Advanced Engineering Materials, EarlyView.A two‐dimensional multiscale finite element analysis framework was established for the first‐generation MoSiBTiC alloy, and the mechanical and fracture‐related parameters of the constituent phases were calibrated through experiments and simulations. The framework provides a basis for analyzing crack propagation behavior in its complex microstructure ...
Junfeng Du +4 more
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Advanced Engineering Materials, EarlyView.Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova +2 more
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Scientific Reports, 2021 Transition from the highest rate of lever-pressing activity during the unloading (extinction) phase of a cocaine self-administration session to an extremely low activity rate during the remission phase is in many cases gradual. This makes it difficult to
Vladimir L. Tsibulsky, Andrew B. Norman
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Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates
Strojniški vestnik – Journal of Mechanical Engineering, 2013 In this study, nanoindentation technique was used to determine the nonlinear viscoelastic behavior of polyvinyl acetate (PVAc) with a glass transition temperature of 29 °C. Nanoindentation was conducted with a Berkovich nanoindenter tip under the same constant loading rate but different unloading rates.
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