iMechanica

Experimental results on nonlinear vibration localization in a cyclic chain of weakly coupled oscillators with clearance nonlinearity are reported. Numerical modelling and analysis complements the experimental study. A reduced order model is derived and numerical analysis based on the harmonic balance method demonstrates the existence of multiple classes of stable spatially localized nonlinear vibration states. The experiments agree very well with the numerical results.

Dear Colleagues,

Welcome to submit your abstract to USNCCM 16 Minisymposium: Machine Learning for Solving Inverse Problems in Computational Mechanics and Materials (http://16.usnccm.org/MS_325)

Position Summary:

This position requires a Ph.D. degree in Electrical Engineering or a related engineering field with experience on power electronics design and implementation from 100 W to 100kW. As part of this position, the candidate will be expected to contribute significantly to ongoing and potential future related projects, including ocean wave energy conversion, ocean tidal and current energy conversion, offshore wind energy, and regenerative vibration control, funded by the U.S DOE, ONR, NSF, national labs, and industry. The candidate will also be engaged with other research, development and outreach activities of the Center for Energy Harvesting Materials and Systems (CEHMS).

Roles and Responsibilities:

1.    Conduct research on topics across power electronics for off-grid and grid applications, including AC/DC and DC-DC converter design, energy storage, power management, maximum power tracking, feedback control, etc.

2.    Significantly contribute to multiple concurrent projects through research design, data collection, analysis, modeling, simulation, implementation, and demonstration.

3.    Manage project activities and staff, including mentorship of doctoral, master’s, and undergraduate students.

4.    Develop new research programs and other professional duties in a timely manner.

5.    Collaborate with faculty, researchers, staff, and students in the project team at VT and from external organizations, to:

a.        Successfully complete research deliverables;

b.       Disseminate efforts and findings from research and outreach initiatives including manuscripts in peer-reviewed publications, topical conferences, symposia, and workshops.

How to apply:

Candidates with required knowledge and experiences can send resume with contacts of three references to Prof. Lei Zuo (leizuo@vt.edu)

Lei Zuo, Ph.D,  Robert E. Hord Jr. Professor

Professor of Mechanical Engineering

Professor of Electrical and Computer Engineering

Director, NSF IUCRC Center for Energy Harvesting Materials and Systems

Virginia Tech,  Blacksburg, VA 24061, USA

  Email: leizuo@vt.edu, Phone: 540-231-7270

The Materials Theory Group at the School of Materials Engineering of Purdue University has a postdoctoral opening in the area of phase field modeling of oxide film growth. The postdoc will use the phase field approach to investigate the growth of metal oxide films in an oxidizing environment, emphasizing the film grain morphology, composition, and stress distribution. The ideal candidate will have a strong background in phase field modeling with elastic effects and excellent computational skills. For inquiry, please email Professor Anter El-Azab (aelazab@purdue.edu). This position is part of a collaborative project with a materials research and software development company, and it will be available as early as April 1, 2021. The position will remain open until filled. Interested candidates can send a curriculum vita with list of publications, about half a page statement of research interests, and the names and contact information of at least two references. The Materials Theory Group performs theoretical and computational research in the areas of dislocation dynamics and mesoscale plasticity, radiation effects in materials, phase field method and applications to microstructure evolution in materials, phonon and electron thermal transport in crystalline solids, and computational methods for materials science and mechanics.
EEO/AA Policy:
Purdue University is an EOE/AA employer. All qualified individuals, including minorities, women, individuals with disabilities, and veterans are encouraged to apply.
Department Website https://engineering.purdue.edu/MSE

We have two postdoc openings in the field of laser additive manufacturing of metals at Tsinghua University. The candidates are required to have expertise in synchrotron x-ray techs, metal additive manufacturing, electron microscopy (TEM/SEM), structural phase transformation, or micromechanics. This is a two-year appointment with the possibility of renewal. See more information here (in Chinese): https://lnkd.in/g-HbcqH. 

cdmHUB invites you to attend the Global Composites Experts Webinar Series. 

Title: Novel Power Epoxy Composites for Thin-Section Structures

Speaker: Dr. Conchur O Bradaigh

Time: 1/21, 11AM-12PM EST.

Please go to https://www.purdue.edu/cmsc/events/2020-webinars/ to register for this webinar.

Energy, Control and optimization lab(ECO) at Stevens Institute of Technology has two immediate post doc positions.

The candidates should have a degree in Computer Science or have a prior experinec in Deep Learning and data analysis.

Please send your CV to shima.hajimirza@stevens.edu, if you have the right background and you can work as post-doc immediately.

It gives me great pleasure to announce the mini-symposium titled "Characterization and Modeling of Dynamic Fracture of Composites" at the 2021 Mach conference, to be held virtually from April 7 to April 9 2021.

The Mach Conference showcases the state of the art of multiscale research in materials, with an emphasis on advancing the fundamental science and engineering of materials and structures in extreme environments

In this article, the effect of material aging of an elastomeric main spring (MS) inside a hydraulic engine mount (HEM) on its dynamic performance is investigated. A set of HEMs aged under realistic operational conditions are used to create an empirical material aging model of the elastomer at two different temperatures (35°C and 95°C) using dynamic mechanical thermal analysis (DMTA).

Strain rate and temperature dependent elastic limit of mild steel is investigated by developing a dislocation incipient motion-based proportionality limit stress model. Temperature effect on strain energy of an edge dislocation is modeled by using unified mechanics theory. Unified mechanics theory-based index, called thermodynamic state index, is used to model thermally assisted degradation of strain energy. Kinetic energy due to thermal vibrations is added to the kinetic energy of an accelerating dislocation.

Experimental Mechanics Postdoc position available starting summer 2021 in the Franck Lab at the University of Wisconsin-Madison (https://www.franck.engr.wisc.edu/)

The Traverso Laboratory is seeking a PhD-level mechanical/biomedical engineer to join the team focused on the development of novel gastrointestinal devices for treatment of major diseases. This includes technologies such as drug delivery systems, smart pills and stents, soft actuators, and ingestible electronics. The ideal candidate will have extensive experience designing and analyzing mechanical systems and materials for biological application.

Abstract

Professor Nasser Khalili's research group at the School of Civil and Environmental Engineering, UNSW Sydney, Australia (https://www.engineering.unsw.edu.au/civil-engineering/staff/nasser-khalili), is looking for several PhD students on the following topics:

1) Computational Mechanics of Multiphase Porous Materials

2) Geo-structure Health Monitoring and Predictive Maintenance

As the Editor-in-Chief of Theoretical and Applied Fracture Mechanics (TAFMech, https://www.journals.elsevier.com/theoretical-and-applied-fracture-mechanics/), this post is to invite you all to attend our first free global live webinar on Fracture Mechanics-related topics that will take place this Friday (15/1) at 2 pm GMT:

Dear Colleagues,

Here is our recent paper published in EML on collective behavior in solid-state photoreaction. Combining statistical mechanics and continuum mechanics, we build a model to predict and explain multiple collective behaviors reported in experiments of solid-state photoreaction for the first time.

Collective behavior in the kinetics and equilibrium of solid-state photoreaction

Ruobing Bai, Ying Shi Teh, Kaushik Bhattacharya*

The current push toward lightweight structures in aerospace and aeronautical engineering is leading to slender design airfoils, which are more likely to undergo large deformation, hence experiencing geometrical nonlinearities. The problem of vibration localization in a rotor constituted by N coupled airfoils with plunge and pitch degrees of freedom subjected to flutter instability is considered.

Recently, Dalvi and co-authors have shown detailed experimental data of adhesion of soft spheres with rough substrates with roughness measured down to almost the atomic scale, finding that the Persson and Tosatti theory gave satisfactory predictions of the apparent work of adhesion during loading, once the increase of the surface area due to roughness is correctly computed at extremely small scales.

Webinar 1) Working experience in Bosch & Ferrari Formula 1 of a POLIBA graduate.   

Specifically, the post requires expert knowledge in experimental and/or computational mechanics of materials and/or tribology. The position is part of a large international EPSRC-SFI funded project aimed at developing next generation textile triboelectric nanogenerators (or T-TENGs) for powering of wearable electronics.  This position will focus on the mechanics and tribology of T-TENGs and will involve both modelling and experimental work.

1 PhD position (36 months) within the EID-ITN Marie Curie project LIGHTEN, funded by European Union, is available at the University of Trento (Italy).
The student will be supervised by my colleague Diego Misseroni and myself (Francesco Dal Corso), and two engineers at the English company Tensys (where the student will spend 18 months). If you are interested, please read the below description and the attached announcement before to apply.

Brief. One full-time PhD positions on "Fibre-reinforced Composites (manufacturing, non-destructive testing, and finite element analysis)" is available. The successful candidate will be working within a team of post-docs on an aerospace project.

Minimum Requirements. High GPA and a track record of high quality relevant publications.

Location. Griffith University, Gold Coast Campus, Australia.

Funding. Full funding is available for one candidate. 

 2 Ph.D. positions in Computational Mechanics in Luxembourg 

University of Connecticut has an immediate opening for a postdoctoral researcher.  The research project, sponsored by AFRL, concerns uncertainty quantification of manufacturing processes.  Required qualifications include good command of finite element analysis and related programming capability.  Preferred skills include knowledge on meta-modeling and understanding of machine learning.  Please contact Professor Jiong Tang (jiong.tang@uconn.edu) if you are interested.

Dear Friends of EML,

Happy New Year! 

2020 was an extremely challenging year for all because of COVID 19. For most of us, the lockdowns and work from home negatively impacted our research activities; for some, it provided a time to reflect on the value of our work; and, for a few, it presented an unusual opportunity to explore new directions of research.