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English (4)


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2019 (4)

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Dissertation
Development of a vehicle dynamics model including a steering model to support a car-driver interaction PhD
Authors: --- --- ---
Year: 2019 Publisher: Liège Université de Liège (ULiège)

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Abstract

During the tire development process, its handling properties are
first assessed objectively by tests on specific test benches as on track.
Then, professional test-drivers perform some subjective tests on track
to evaluate its performances based on their own feeling.

Here comes the importance of the vehicle-driver interactions understanding,
i.e. the subject of the PhD supported by this Master Thesis,
to answer such questions and adapt the tire to customer needs :
"Which tire characteristic does influence this handling properties?", "Why
is the driver not performing exactly the same maneuver when that tire
parameter is changed?", "What does alter the driver judgment?".

Some studies ongoing in the frame of this PhD had already shown
correlations between subjective and objective assessments. As a results,
a qualitative model was needed to corroborate these correlations,
to link them to tire characteristics and specifications, and to
bring a physical explanation of the phenomena observed.

A theoretical tool, split in the three main blocks listed below,
has then been implemented in MATLAB© during this internship
to bring an analytical approach.

1. A body dynamics model consisting in a modified yaw-slip-roll single
track model. The kinematics and compliance terms will also be
integrated in this model.

2. A steering model, developed in four sub-models of increasing
complexity.

3. A non linear tire model, defined following the Pacejka ’94 Magic
Formula.

All together, these blocks built a robust global model able to simulate
a wide range of both open and close-loop maneuvers in the linear
and non linear domains. Moreover, this model helped the study
of tire characteristics influence on these maneuvers by using sensitivity
analyses, which leaded to highlight two tire characteristics
having a big influence on subjective assessments: the rear cornering
stiffness and the pneumatic trail.

Having been validated, this model will now be mostly used in a
large-scale study within the Company, in the frame of Nico Pagliarecci
PhD.

Lastly, note that none of the parameters value or tire constructions
used in this work to obtain the results presented will be provided explicitly,
to respect the Goodyear confidentiality policy.


Book
Oversight of federal infrastructure permitting and FAST-41 : hearing before the Permanent Subcommittee on Investigations of the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Sixteenth Congress, first session, May 2, 2019.
Author:
Year: 2019 Publisher: Washington : U.S. Government Publishing Office,

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Abstract


Book
Quantum Nonlocality
Author:
ISBN: 303897949X 3038979481 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This book presents the current views of leading physicists on the bizarre property of quantum theory: nonlocality. Einstein viewed this theory as “spooky action at a distance” which, together with randomness, resulted in him being unable to accept quantum theory. The contributions in the book describe, in detail, the bizarre aspects of nonlocality, such as Einstein–Podolsky–Rosen steering and quantum teleportation—a phenomenon which cannot be explained in the framework of classical physics, due its foundations in quantum entanglement. The contributions describe the role of nonlocality in the rapidly developing field of quantum information. Nonlocal quantum effects in various systems, from solid-state quantum devices to organic molecules in proteins, are discussed. The most surprising papers in this book challenge the concept of the nonlocality of Nature, and look for possible modifications, extensions, and new formulations—from retrocausality to novel types of multiple-world theories. These attempts have not yet been fully successful, but they provide hope for modifying quantum theory according to Einstein’s vision.


Book
Processing-Structure-Property Relationships in Metals
Authors: ---
ISBN: 3039217712 3039217704 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

In the industrial manufacturing of metals, the achievement of products featuring desired characteristics always requires the control of process parameters in order to obtain a suitable microstructure. The strict relationship among process parameters, microstructure, and mechanical properties is a matter of interest in different areas, such as foundry, plastic forming, sintering, welding, etc., and regards both well-established and innovative processes. Nowadays, circular economy and sustainable technological development are dominant paradigms and impose an optimized use of resources, a lower energetic impact of industrial processes and new tasks for materials and products. In this frame, this Special Issue covers a broad range of research works and contains research and review papers.

Keywords

high speed steel --- n/a --- tempering --- microstructure. --- microstructure --- severe plastic deformation --- aging treatment --- indentation hardness --- Nb tube --- secondary recrystallization --- static mechanical behavior --- image analysis --- nanostructured coatings --- thin aluminum sheet --- precipitation behavior --- additive manufacturing --- Ti-6Al-4V alloy --- grain boundary --- property-microstructure-process relationship --- aeronautic applications --- inductive hot pressing --- fracture surface --- indentation modulus --- alloys --- intermetallic --- ultrafine grain --- columnar microstructure --- titanium composites --- multimodal --- steering knuckles --- ultra-fine grain --- damping --- process monitoring --- Al alloys --- tribology --- retained austenite --- mechanical properties --- texture inhomogeneity --- metal posts --- FEGSEM --- ?-platelet thickness --- anelasticity --- warm working --- dental materials --- computer-aided design (CAD) --- SEM --- high strength --- SEBM --- non-monotonic simple shear strains --- cavitation erosion --- aluminum film --- impact toughness --- wear --- mechanical property --- in situ secondary phases --- bainite rail --- corrosion resistance --- macro-instrumented indentation test --- EBM --- cryorolling --- aluminum alloy --- equal channel angular pressing --- microstructure inhomogeneity --- casting --- electron backscatter diffraction --- prediction model --- grain boundaries --- porosity --- texture --- high pressure die casting --- shear strain reversal --- finite element analysis --- thin films --- AZ91 alloy --- tensile properties --- tensile property --- Al 6061 alloys --- aging --- reduction --- Mg-10Y-6Gd-1.5Zn-0.5Zr --- caliber-rolling --- shrinkage

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