Numerical analysis of NiTi actuators with stress risers: The role of bias load and actuation temperature

AbstractIn this paper we focus on the elastic and thermodynamic properties of the B1 phase of CaO by using the modified TBP model, including the role of temperature. We have successfully obtained the phase transition pressure and volume change at different temperatures. In addition elastic constants and bulk modulus of B1 phase of CaO at different temperatures are discussed. Our results are comparable with the previous ones at high temperatures and pressures. The thermodynamical properties of the B1 phase of CaO are also predicted.

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Role of Upper-Flow-Regime Bedforms Emplaced by Sediment Gravity Flows in the Evolution of Deltas

Journal of Marine Science and Engineering ◽

10.3390/jmse7010005 ◽

2019 ◽

Vol 7 (1) ◽

pp. 5 ◽

Cited By ~ 10

Author(s):

Svetlana Kostic ◽

Daniele Casalbore ◽

Francesco Chiocci ◽

Jörg Lang ◽

Jutta Winsemann

Keyword(s):

Numerical Analysis ◽

High Resolution ◽

Flow Regime ◽

Case Studies ◽

Seismic Data ◽

Lake Level ◽

Sediment Gravity Flows ◽

Gravity Flows ◽

Digital Elevation

Upper-flow-regime bedforms and their role in the evolution of marine and lacustrine deltas are not well understood. Wave-like undulations on delta foresets are by far the most commonly reported bedforms on deltas and it will take time before many of these features get identified as upper-flow-regime bedforms. This study aims at: (1) Providing a summary of our knowledge to date on deltaic bedforms emplaced by sediment gravity flows; (2) illustrating that these features are most likely transitional upper-flow-regime bedforms; and (3) using field case studies of two markedly different deltas in order to examine their role in the evolution of deltas. The study combines numerical analysis with digital elevation models, outcrop, borehole, and high-resolution seismic data. The Mazzarrà river delta in the Gulf of Patti, Italy, is selected to show that upper-flow-regime bedforms in gullies can be linked to the onset, growth, and evolution of marine deltas via processes of gully initiation, filling, and maintenance. Ice-marginal lacustrine deltas in Germany are selected as they illustrate the importance of unconfined upper-flow-regime bedforms in the onset and evolution of distinct delta morphologies under different lake-level trends.

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Numerical Analysis for Progressive Collapse of a Multi-Storey Building due to an Explosion in its Basement

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.3115 ◽

2011 ◽

Vol 250-253 ◽

pp. 3115-3119 ◽

Cited By ~ 4

Author(s):

Li Tian ◽

Hao Wang

Keyword(s):

Numerical Analysis ◽

Progressive Collapse ◽

Simulation Method ◽

Structural Members ◽

Reinforced Concrete Frame ◽

Concrete Frame ◽

Whole Process ◽

Main Work ◽

Storey Building

A numerical analysis for the progressive collapse of a reinforced concrete frame caused by an explosion in this structure’s basement is presented in this paper. The whole process from the detonation of the explosive charge to the complete demolition is reproduced. The main work is focused on the role of soil in structural collapse and failure mode of structural members. The analysis is simulated using ANSYS/LS-DYNA and proposes a new simulation method which is comparatively accurate and economic.

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The Effects of the Rubber Bearing on the Seismic Performance of the Aqueduct-Water Coupling Structure

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.275-277.1370 ◽

2013 ◽

Vol 275-277 ◽

pp. 1370-1373

Author(s):

Qiu Hua Duan ◽

Dan Dan Zeng ◽

Lu Feng Yang

Keyword(s):

Numerical Analysis ◽

Temperature Stress ◽

Seismic Performance ◽

Water Depth ◽

Coupling Structure ◽

Rubber Bearing ◽

Bridge Structures ◽

Rubber Bearings ◽

Water Bridges

Rubber bearings are widely used in bridge structures. The aqueduct structures are water bridges, so rubber bearings are often set at the end of the aqueducts. Rubber bearing cannot solve the problems such as temperature stress and supporting inhomogeneous settlement, but also play role of isolation damping. This paper mainly studies on the effects of the water-depth with changing rubber bearing on the seismic performance of the aqueduct-water coupling structure by numerical analysis.

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IDEA’s Double Bind: A Synthesis of Disproportionality Policy Interpretations

Council review ◽

10.1177/0014402918818047 ◽

2019 ◽

Vol 85 (4) ◽

pp. 395-412

Author(s):

Amanda L. Sullivan ◽

Daniel Osher

Keyword(s):

Numerical Analysis ◽

Federal Policy ◽

Critical Examination ◽

Double Bind ◽

School Systems ◽

Allocation Of Resources ◽

Educational Problem ◽

Federal Policies ◽

Policies And Procedures

Disproportionality research has been subject to multiple reviews, but there has been less critical examination of the policy dimension of this enduring educational problem. Given the relevance of federal policies, and interpretations thereof, to educators’ and scholars’ conceptualization of disproportionality and schools’ resultant policies and practices, we provide a brief overview of disproportionality scholarship before focusing on its policy dimensions. We describe the role of federal policy and resultant interpretations to how disproportionality is addressed and our approach to identifying and synthesizing these interpretations. We then analyze the themes apparent in these interpretations: requirements for states’ numerical analysis of “significant disproportionality,” parameters for school systems’ allocation of resources for early intervening services when significant disproportionality is found, and schools’ obligations for nondiscriminatory application of policies and procedures. Finally, we distill implications for school policies, practices, and procedures. We close with discussion of implications for how disproportionality is conceptualized and studied.

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Dynamic analysis of the turbo – generator foundation structure

MATEC Web of Conferences ◽

10.1051/matecconf/202031000035 ◽

2020 ◽

Vol 310 ◽

pp. 00035

Author(s):

Jan Benčat ◽

Michal Tomko ◽

Michal Lukáč

Keyword(s):

Numerical Analysis ◽

Power Plant ◽

Dynamic Analysis ◽

Dynamic Stiffness ◽

Plant Industry ◽

Characteristic Analysis ◽

Current Trends ◽

Turbo Generator ◽

Foundation Structure

This paper provides view of current trends in the field of testing and numerical analysis of dynamic loading structures. It describes what is the role of structure dynamic characteristic analysis in the management of the structures construction and maintenance in power plant industry. The main objective of this study is the dynamic analysis of power plant turbo– generator foundation structure (TGFS) of electrical industry operation. Main purpose of performed study in 2017 was to check dynamic stiffness TGFS after fifty years TG (100 MW) performance which then enabled to prepare relevant data for making design renovation and strengthening of the TGSF.

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A Numerical Analysis for TEHL of Eccentric-Tappet Pair Subjected to Transient Load

Journal of Tribology ◽

10.1115/1.1576425 ◽

2003 ◽

Vol 125 (4) ◽

pp. 770-779 ◽

Cited By ~ 22

Author(s):

J. Wang ◽

P. Yang

Keyword(s):

Numerical Analysis ◽

Film Thickness ◽

Elastohydrodynamic Lubrication ◽

Surface Layers ◽

Transient Load ◽

Working Cycle ◽

Pair Comparisons ◽

Frictional Coefficients ◽

Wedge Pressure

A full numerical analysis is carried out to simulate the thermal elastohydrodynamic lubrication (TEHL) of an eccentric-tappet pair. Comparisons between thermal and isothermal results are given to reveal the role of the thermal effect. Under various eccentricities, the influences of two surfaces moving in opposite directions on pressure and film thickness profiles are analyzed and explained by the mechanism of the temperature-viscosity wedge. Pressure and film thickness profiles, the temperature and velocity distributions at zero entraining velocity are discussed fully. Particular analyses are given on the entrapped immobile surface layers that influence the velocity distribution at zero entraining velocity. Furthermore, in a working cycle, variations of central and minimum film thicknesses and frictional coefficients, under different eccentricities, are discussed.

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