Lecture

Nonlinear Behavior of Geomaterials

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In course

CIVIL-203: Soil mechanics and flow through porous media

The course introduces students to the fundamentals of the mechanics of soils and fluid-infiltrated porous media. The first part is devoted to the constitutive behavior of soils in dry conditions, while the second part accounts for the presence of pore wate ...

Description

This lecture covers the nonlinear behavior of geomaterials, including irreversibilities and hysteresis, with a focus on the Cam-Clay model. It discusses the limitations of usual simplifications in geomechanics, such as elasticity and perfect plasticity, and introduces the generalized Hooke's law. The course also explores rigid-perfectly plastic materials, their causes of plasticity, and the laws studied, such as Von Mises and Mohr-Coulomb. Various figures and equations are used to illustrate the concepts.

Instructor

Laurent Vulliet

EDUCATION 2016 Board Member Certificate, Swiss Board School, Switzerland 2008 AMP (Advanced Management Program), INSEAD, Fontainebleau, France 1986 PhD (Dr sc. tech.), EPFL, Lausanne, Switzerland 1980 Ms, Civil Engineering (Dipl. Bauing. ETH), ETHZ, Zurich, Switzerland PROFESSIONAL ACTIVITIES 1994 - Present Professor, EPFL. Director of the Soil Mechanics Laboratory (1994-2008). Promoted from Associate to Full Professor in 1996. Part-time position since 2008 2008 - 2015 CEO, BG Consulting Engineers, Lausanne, Switzerland. 2001 - 2008 Dean, School of Architecture, Civil and Environmental Engineering (ENAC), Ecole polytechnique fédérale, Lausanne (EPFL) 1999 - 2001 Head, Civil Engineering Department, EPFL 1989 - 1993 Senior Engineer, De Cérenville Géotechnique SA, Ecublens, Switzerland 1987 - 1989 Lecturer, Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, USA 1986 Invited Researcher, Laboratoire central des ponts et chaussées (LCPC), Paris, France 1981 - 1986 Research assistant, and PhD student, Soil Mechanics Laboratory (LMS), EPFL. Thesis on the modeling of natural creeping slopes. Co-advisors Prof. E. Recordon (EPFL) and Prof. K. Hutter (TU Darmstadt) BOARDS / COUNCILS

Member of the Board of Directors, Implenia, Dietlikon, Switzerland (2016 - present)
Member of the Board of Directors, BG Consulting Engineers, Lausanne (2006 - 2015)
Vice-President, Swiss Society of Engineers and Architects (SIA). 2009-2013.
Member, Foundation Council, Foundation Les Bois Chamblard, financing research in Environmental Sciences at EPFL (focusing on bio-diversity). 2003-present
Member, Foundation Council of the Presses Polytechniques et Universitaires Romandes (PPUR), Lausanne. 1995-present
Member, Stiftungsrat der Präventionsstiftung der KGV (a Swiss foundation for the financing of applied research in the domain of natural risks from Cantonal Building Insurances). 2003-2008
Member of the Board of Directors, Stump Bohr AG, Nänikon. 1998 2001

PROFESSIONAL SOCIETIES

Swiss Society of Engineers and Architects (SIA)
American Society of Civil Engineers (ASCE)
International Association for Computer Meth. and Advances in Geomechanics (IACMAG)
International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)
International Society for Rock Mechanics (ISRM)
Swiss Society for Soil and Rock Mechanics (SSMSR)
Swiss Society for Earthquake Engineering and Structural Dynamics (SGEB)

SCIENTIFIC COMMITTEES

Swiss National Science Foundation (NSF): member of the Foundation Council and of the Electoral Commission (1996-2003)
Extra-Parliamentary National Commission on Natural Disasters (PLANAT): member of the Commission 1997-2007 (member of the Executive Board from 1997 to 2000)
Natural Hazards Competence Centre CENAT (ETH Domain): founder member and member of the Board of Directors (1995-2007)
Alliance of European Research Laboratories (ALERT), member of the Board of Directors (1995-2009)
Beratende Kommission Swiss Federal Institute for Forest, Snow and Landscape Research (WSL): member (2000-2004)
Centro Stefano Franscini (CSF, Monte Verità): member of the Scientific Advisory Committee (1997-2007)
EPFL Press and Information Commission (CPI). Member 1994-94, President 1995-2000

EDITORIAL BOARDS

Adjunct Editor-in-Chief, Revue française de génie civil (Hermès); founder member (1996-Present). Cette revue est devenue "European Journal of Environmental and Civil Engineering"
Editorial Advisory Board, Int. J. Num. Analyt. Meth. in Geomech., John Wiley (1997-2009).
Editorial Board, Int. J. of Geomechanics (2000-2009).
Editorial Board, Computer & Geotechnics, Elsevier (2001-2009).
Editorial Board, Rivista Italiana di Geotecnica (1997-2009).

Official source

Ontological neighbourhood

Chemical engineering

Materials science: Deformation of materials

Related concepts (25)

Price elasticity of demand

A good's price elasticity of demand (, PED) is a measure of how sensitive the quantity demanded is to its price. When the price rises, quantity demanded falls for almost any good, but it falls more for some than for others. The price elasticity gives the percentage change in quantity demanded when there is a one percent increase in price, holding everything else constant. If the elasticity is −2, that means a one percent price rise leads to a two percent decline in quantity demanded.

Synaptic plasticity

In neuroscience, synaptic plasticity is the ability of synapses to strengthen or weaken over time, in response to increases or decreases in their activity. Since memories are postulated to be represented by vastly interconnected neural circuits in the brain, synaptic plasticity is one of the important neurochemical foundations of learning and memory (see Hebbian theory). Plastic change often results from the alteration of the number of neurotransmitter receptors located on a synapse.

Neuroplasticity

Neuroplasticity, also known as neural plasticity, or brain plasticity, is the ability of neural networks in the brain to change through growth and reorganization. It is when the brain is rewired to function in some way that differs from how it previously functioned. These changes range from individual neuron pathways making new connections, to systematic adjustments like cortical remapping. Examples of neuroplasticity include circuit and network changes that result from learning a new ability, information acquisition, environmental influences, practice, and psychological stress.

Spike-timing-dependent plasticity

Spike-timing-dependent plasticity (STDP) is a biological process that adjusts the strength of connections between neurons in the brain. The process adjusts the connection strengths based on the relative timing of a particular neuron's output and input action potentials (or spikes). The STDP process partially explains the activity-dependent development of nervous systems, especially with regard to long-term potentiation and long-term depression.

Elasticity (economics)

In economics, elasticity measures the responsiveness of one economic variable to a change in another. If the price elasticity of the demand of something is -2, a 10% increase in price causes the quantity demanded to fall by 20%. Elasticity in economics provides an understanding of changes in the behavior of the buyers and sellers with price changes. There are two types of elasticity for demand and supply, one is inelastic demand and supply and other one is elastic demand and supply.

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