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rabedi's picture

PhD position in computational mechanics (focus elastodynamics)

  

Hello,

I have a PhD position available for a project involving the design of metamaterial unit cells for shock wave mitigation applications. The graduate research assistantship (GRA) position is for the University of Tennessee Space Institute (UTSI) which is a part of University of Tennessee Knoxville (UTK). The student will be located in Knoxville. Some important points are:

MehdiAmiri's picture

Special Issue "Thermodynamics of Materials Degradation"

Dear Colleagues,

The degradation of a structure, under various loading conditions, involves the progress of damage by initiation and growth of defects, such as microvoids and microcracks, and their coalescence into macrocracks. Thermodynamically, all damage mechanisms share a common feature at a much deeper level, which is dissipation of energy. Degradation processes are irreversible, meaning that they cause irreversible alteration to the system and the surroundings.

USACM Virtual Seminar by Pania Newell, University of Utah

The USACM is happy to announce a virtual seminar this week on Wednesday, July 1st at 3pm Eastern.  The title of the seminar is "Examining Fracture Behavior in Heterogeneous Poro-Elastic Media from Nano to Macro-Scale".  An abstract of the talk is available here:

https://unsacm.memberclicks.net/assets/docs/Newell_2020.07.01_2pm.pdf

We have a number of seats available to anyone interested.  We just ask attendees to register at this page:

Oscar Lopez-Pamies's picture

Revisiting Nucleation in the Phase-Field Approach to Brittle Fracture

Twenty years in since their introduction, it is now plain that the regularized formulations dubbed as phase-field of the variational theory of brittle fracture of Francfort and Marigo (1998) provide a powerful macroscopic theory to describe and predict the propagation of cracks in linear elastic brittle materials under arbitrary quasistatic loading conditions. Over the past ten years, the ability of the phase-field approach to also possibly describe and predict crack nucleation has been under intense investigation.

WaiChing Sun's picture

Computational Mechanics Postdoctoral Research Scientist Position at Columbia University

Dear colleagues, 

There is a new opening for one postdoc position, to be filled immediately, in my research group in the Department of Civil Engineering and Engineering Mechanics at Columbia University. We are looking for postdocs in the broad area of computational mechanics. Candidates should have expertise in modeling dynamic responses of path-dependent materials. Our project is specifically focused on applications of machine learning (reinforcement learning, graph embedding) for computational plasticity and damage. 

Bin Liu's picture

Intrinsic-to-extrinsic transition in fracture toughness through structural design: A lesson from nature

Published in Extreme Mechanics Letters: https://doi.org/10.1016/j.eml.2020.100685. Catastrophic failure of materials and structures due to unstable crack growth could be prevented if fracture toughness could be enhanced at will through structural design, but how can this be possible if fracture toughness is a material constant related to energy dissipation in the vicinity of a propagating crack tip.

Machine Learning for Fracture Mechanics

Safer batteries, more efficient gas-turbine engines and solar cells, all require better-engineered nanocomposite materials. There is a limitation though -- how to investigate the fracture mechanics of these materials? Machine learning can help us overcome this limitation.

PhD scholarship application in Geomechanics at University of Lyon - Micromechanical and multi-scale behaviour of damaged heterogeneous rocks around underground excavations

 

Description:

The goal of this project is to investigate the multi-scale behaviour of clay rocks, going from microscopic to macroscopic scale, with application to underground drilling. The research will be based on multi-scale approach and numerical method allowing to model microstructure media in a double-scale framework (FEMxFEM). Please, see the full description in the attached file here below.

Nuwan Dewapriya's picture

Characterizing fracture stress of defective graphene samples using shallow and deep artificial neural networks

Abstract: Advanced machine learning methods could be useful to obtain novel insights into some challenging nanomechanical problems. In this work, we employed artificial neural networks to predict the fracture stress of defective graphene samples. First, shallow neural networks were used to predict the fracture stress, which depends on the temperature, vacancy concentration, strain rate, and loading direction.

Postdoctoral position on high-entropy alloys in Nanyang Technological University

Research Fellow (Post-Doctoral) Position

Nanyang Technological University, Singapore

 

Area: Computational investigation of fracture mechanisms in high-entropy alloys

Emilio Martínez Pañeda's picture

Mode II fracture of an elastic-plastic sandwich layer

Dear iMechanicians,

Please find below a paper, co-authored with Ivan Cuesta and Norman Fleck, on the mode II fracture of elastic-plastic sandwich layers. The paper is part of the special issue in the Journal of Applied Mechanics dedicated to John Hutchinson's 80th anniversary and the Century Fracture Mechanics Summit.

Emilio Martínez Pañeda's picture

PhD position in Computational Fracture Mechanics of porous media at Imperial College London (UK applicants only)

Applications are invited for a PhD scholarship at Imperial College London. The work will be conducted in close collaboration with the University of Cambridge, with the student being supervised by Dr ​​​​Emilio Martínez Pañeda (main supervisor), Prof Catherine O'Sullivan (Imperial College) and Prof Norman Fleck FRS FREng (University of Cambridge). 

The project aims at developing new theoretical and computational micromechanics-based models for rocks and porous media. More details of the project are given here:

Daniel S. Balint's picture

Research Associate (PostDoc) in Dislocation Mechanics Modelling for Nuclear Materials, at Imperial College London

I have a post-doc position for up to 28 months at Imperial College London, working on dislocation mechanics modelling for problems in nuclear materials, advert snippet below, full advert and application from the link below. Closing date 30th October 2019, starting as soon as possible, at least within the next 6 months.

vh's picture

Call for Abstracts: Numisheet 2020 mini symposium on “Challenges and Opportunities in Forming Aluminum”

The NUMISHEET conference series is the most significant international conference on the area of the numerical simulation of sheet metal forming processes. Within Numisheet 2020, we are organizing a mini symposium on “Challenges and Opportunities in Forming Aluminum”.

WaiChing Sun's picture

Call for Abstract: WCCM Paris Mini-symposium on Computational Geomechanics

Dear colleagues,  We would like to make you aware of a mini-symposium we are organizing for WCCM-ECOMAS in 2020, to be held in Paris on July 19-24, 2020. The symposium is entitled "Computational Geomechanics", and focuses on modeling aspects related to geological materials.

Shuman_Xia's picture

SEM Fracture and Fatigue Call for Papers

Dear Colleagues,

We invite you to submit a paper to the 2020 Society for Experimental Mechanics (SEM) Annual Meeting in one of the many sessions in the Fatigue and Fracture Track. See below for further information on these sessions, and please forward this to others who may be interested.

Postdoctoral fellowship in computational fracture mechanics at Duke University

I have an opening for a two-year postdoctoral fellowship at Duke University.  The project is a collaboration with experimentalists. and concerns problems in which fractures are driven by fluid flow through porous media.

The ideal candidate will have some background in finite element methods and mechanics, nonlinear coupled field problems, C++, and high-performance computing.  Experience with fracture mechanics is useful but not required.  

The fellowship can begin as soon as this September, 2019, with some flexibility on the start date.  

Emilio Martínez Pañeda's picture

Gradient-enhanced statistical analysis of cleavage fracture

I hope some of you will find this work interesting. We present a new Weibull framework for cleavage fracture that incorporates strain gradient plasticity and can estimate the three parameters of Weibull-type models without any prior assumptions. A post-print is available at www.empaneda.com

Gradient-enhanced statistical analysis of cleavage fracture

Emilio Martínez-Pañeda, Sandra Fuentes-Alonso, CovadongaBetegón

European Journal of Mechanics - A/Solids 77, 103785 (2019)

 

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