Seminars
Upcoming Seminars
Stay tune!
Past Seminars
Magnetorheological CNT Nanocomposites and Their Viscoelastic Responses
May 10, 2017 - 1:00 pm
Speaker: Professor Lizhi Sun
Magnetorheological (MR) elastomer composites with the addition of multi-walled carbon nanotubes (CNTs) are developed. The viscoelastic responses of MR nanocomposites to applied magnetic fields are investigated through dynamic mechanical analysis. It is found that a small amount of carbon nanotubes can effectively improve the mechanical performance of conventional MR elastomers.
A Generalized Approach for Reconstructing the Three-Dimensional Shape of Slender Structures Using Cosserat Rod Theory
May 08, 2017 - 1:00 pm
Speaker: Mayank Chadha
The full-field deformed shape reconstruction of a slender object like pipelines, tethers, mooring cables, surgical tubing and others is desirable for many applications. This work aims at developing an algorithm that determines the three-dimensional global displaced shape of the slender structures from a limited set of scalar surface strain measurements. It is a comprehensive approach that captures the effect of curvature, shear, torsion and elongation. A common behavior of the targeted structures is that they are subjected to small strains but arbitrarily large deformations.
Optimization Problems in Inverse Identification of Delamination in Laminated Composites Using Electrical Resistance Tomography
May 03, 2017 - 1:00 pm
Speaker: Professor Satchi Venkataraman
The imaging technique that uses electrical properties of materials such as electrical resistance measured on the surface/boundary to image subsurface details is called Electrical Resistance Tomography (ERT). Over the last decade or more, ERT techniques have been investigated for applications in subsurface imaging of soils in geotechnical engineering, biomedical imaging of pulmonary edema of lungs and flows in arteries/veins, and for damage quantification for structural health monitoring. Our interest is to develop ERT as a technique as a non-intrusive imaging and damage sensing technique
Sustainable Biogeotechnics: Developing Bio-Mediated and Bio-Inspired Solutions for Hazard Mitigation
May 01, 2017 - 1:00 pm
Speaker: Professor Jason DeJong
Arguably the next advent for the geotechnical engineering profession is to recognize that soil itself is a living ecosystem. For example, more than 10^6 bacteria are typically present in 1 cm3 of poorly graded quarry sand typically used as backfill or roadway subgrade materials in engineering works. The living nature of soil can involve biological and chemical changes that challenge our traditional understanding/assumptions regarding the time-dependent stability in soils.
Scaled Shake Table Model Experiments on Shallow Foundations in Liquefied Soils
April 26, 2017 - 1:00 pm
Speaker: Professor Ramin Motamed
Liquefaction-induced ground failure has accounted for major damage in structures and lifelines for several decades. Well-documented case histories have provided valuable insight into the mechanism of this phenomenon. Recent earthquakes such as the 2010-2011 Canterbury earthquake sequence in New Zealand and the 2011 Great Tohoku earthquake in Japan revealed that the current engineering practice lacks proper consideration of this phenomenon in the design.
San Francisco International Airport Air Traffic Control Tower
April 19, 2017 - 1:00 pm
Speaker: Rafael Sabelli
The new San Francisco International Airport features a 220 foot tall air-traffic control tower surrounded by an integrated three-story, FAA office building. The tower’s iconic torch-like architectural design has become the symbol of the airport.
Faculty Life at a Major Research University: Getting the Job, What to Expect, and How to Survive
April 10, 2017 - 1:00 pm
Speaker: Professor Michael Todd
Ever wondered what it takes to get (and keep!) an academic job at a major research university, like UC San Diego? This presentation, originally developed for American Society of Engineering Education professional development series, discusses how faculty job searches are conducted, what to expect in the job search process, and then what to expect and how to survive an early career faculty appointment at a major research university. This seminar is targeted for anyone who might be interested in or is currently seeking a faculty position.
Overview of the MOMS Program at NSF
April 05, 2017 - 1:00 pm
Speaker: Dr. Kara Peters
This presentation will present an overview of the Mechanics of Materials and Structures (MoMS) program within the Civil, Mechanical, and Manufacturing Innovation Division at the National Science Foundation. The Mechanics of Materials and Structures program supports fundamental research in mechanics as related to the behavior of deformable solid materials and structures under internal and external actions. The program supports a diverse spectrum of research with emphasis on transformative advances in experimental, theoretical, and computational methods.
Extracting Heat from the Earth - Why does Micromechanics Matter
March 17, 2017 - 11:00 am
Speaker: Dr. Ingrid Tomac
Geothermal energy extraction via Enhanced Geothermal Systems (EGS) is being explored at the pilot level, but still faces technical challenges related to hydraulic fracturing of rock, as well as placement of proppant into rough fractures to maintain a stable aperture for successful long-term operation. This presentation focuses on the role of micro-mechanical analyses in gaining a better understanding of the complex, coupled behavior associated with EGS development. The particular micro-mechanics tool used in this study is the Discrete Element Method (DEM).
Numerical Simulation of Cone Penetration for Development of Engineering Correlations
February 28, 2017 - 11:00 am
Speaker: Diane Moug
Correlations of cone penetration test (CPT) measurements to geotechnical soil properties have been well developed for clean silica-sands and sedimentary clays. However, CPT correlations that directly address intermediate soils, such as clayey sands, sandy silts, non-plastic silts, are often not theoretically informed, and furthermore these soils are not well represented in case history data-bases for empirical correlations. These gaps in engineering practice are addressed through a mechanics-based framework to develop correlations between CPT data and engineering soil properties.