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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.

xiangzhang's picture

Frontal vs. bulk polymerization of fiber-reinforced polymer-matrix composites

Dear colleagues,

This paper on  comparison between frontal and bulk polymerization of polymer matrix compositres using a non-dimensional solver is published in Composite Science and Technology. If you would like to take a look, full paper is avaiable at the publisher and Researchgate.


Jingjie Yeo's picture

Discovery and design of soft polymeric bio-inspired materials with multiscale simulations and artificial intelligence It is my privilege and honor to be highlighted as the Journal of Material Chemistry B's Emerging Investigators for 2020. Together with our group's young budding scientists, Chenxi Zhai, Tianjiao Li, and Haoyuan Shi, we review the discovery and design of next-generation bio-inspired materials by harnessing the virtual space in materials design: materials omics (materiomics), materials informatics, computational modelling and simulations, artificial intelligence (AI), and big data.

Eral Bele's picture

PhD Studentship in Mechanics of Materials at University College London

A PhD studentship is available in the Department of Mechanical Engineering at University College London, on the topic of "Detection and Identification of Damage in Composite Fibre/Metal Laminate Structures Using Guided Ultrasonic Waves". It is fully funded (fees + stipend) for UK citizens and EU citizens with UK residency (fees only for international students).

The academic group at UCL has an internationally leading profile and an exceptional publication record, and this project will provide numerous opportunities for high-profile publications and conference presentations. The project involves considerable interaction with other members of the research group, which has a very open, co-operative and friendly culture. The UCL laboratories are very well resourced with equipment, computers, consumables and all that is needed to perform research at the highest standard. The aim is to provide the best conditions for world-leading research.

iMechanica Video's picture

iMechanica Video: 2015 Xi'an JiaoTong University Commencement Speech by Zhigang Suo

This video records the Xi'an JiaoTong University Commencement Speech in 2015 given by Zhigang Suo, co-founder of iMechanica. The speech was given in Chinese. Keyword: Opportunity. See the script of the speech here. Google translate of the script is here.

graduate research assistant in the fall of 2020

Graduate Research Assistant position is available to either US Citizen or Permanent Resident in the fall semester of 2020. Apply for CEE or ME department. (advisor: Jeongho Kim) Contact:, University of Connecituct.

miquel.aguirre's picture

Assistant Professor in Biomechanics and Mechanobiology (1 year renewable) - École des Mines de Saint Étienne (France)

The Centre Ingénierie et Santé (CIS) – Laboratoire SAnté INgéniérie BIOlogie St-Etienne (SAINBIOSE), part of École des Mines de Saint Étienne (France) is looking for an Assistant Professor in Biomechanics and Mechanobiology to join our research group. The initial position is offered for 1 year and can be renewed depending on the recruired person performance.

Expected candidate profile

Kaushik Dayal's picture

Statistical Mechanical Analysis of the Electromechanical Coupling in an Electrically-Responsive Polymer Chain

This is the preprint of an article that will appear in Soft Matter (

Statistical Mechanical Analysis of the Electromechanical Coupling in an Electrically-Responsive Polymer Chain

Matthew Grasinger and Kaushik Dayal
Carnegie Mellon University

Xin Liu's picture

Ph.D. Opening in Data-driven Multiscale Modeling of Composite Structures at the University of Texas at Arlington

Funded Ph.D. positions are available in Dr. Liu's group ( in the Industrial, Manufacturing, & Systems Engineering Department at the University of Texas at Arlington (UTA). The students will also work with the Institute for Predictive Performance Methodology (IPPM) at the University of Texas at Arlington Research Institute (UTARI). Self-motivated individuals who have research experience in one or more of the following areas are strongly encouraged to apply for the Ph.D.

USACM Virtual Seminar Series this Summer

The USACM has established a virtual seminar series that will run for six weeks over the course of this summer.  Exact dates and times will vary each week, but a full listing of the speakers is available here:

The series features young computational mechanicians from across the US.  The talks are an opportunity for these young scientists to showcase their research activities during a period in which so many conferences and meetings are being cancelled or postponed.  

iMechanica Video's picture

iMechanica Video: National Committee for Fluid Mechanics Films

This collection of videos was created in ~1969 to explain fluid mechanics in an accessible way for undergraduate engineering and physics students. See for notes associated with these videos.

iMechanica Video's picture

iMechanica Video: Richard Feynman Messenger Lectures

In these Messenger Lectures on "The Character of Physical Law," originally delivered at Cornell University and recorded by BBC Nov. 9-19, 1964, physicist Richard Feynman offers an overview of selected physical laws and gathers their common features into one broad principle of invariance. From 1945 to 1950, Feynman taught theoretical physics at Cornell. He went on to accept a professorship at Caltech and was named co-winner of the 1965 Nobel Prize in physics.

PhD Admissions at Mahindra University, India


Admissions in Fall 2020 to the PhD program at Mahindra University are open. Application deadline is 20 June.


Please visit the following webpage for more details:




iMechanica Video's picture

iMechanica Video: Throwing a Needle Through Glass in Slow Motion

20 million views in YouTube. High-speek camera captures how a Shaolin Master throws a needle through glass. Dynamic brittle facture in slow mo. 

Like this video? Check out other iMechanica Videos in the "Mechanics in slow mo" playlist. If you don't see it, you don't get it.


frankyong0707's picture

PhD Position in Computational Mechanics at Binghamton University

We are inviting motivated, talented students to apply a PhD opening fully funded by NIH starting Fall 2020 or Spring 2021. The project is focused on the computational modeling of membrane mechanics for understanding vesicle formation in bacteria. The student will work in a multidisciplinary group with experimental microbiologists and mechanical engineers. Candidates with a background in mechanics and biophysics/biochemistry are encouraged to apply. Strong programming skills in C/C++ and experience with all-atom or coarse-grained molecular dynamics are preferred.

General Shell Section (Abaqus)


I have defined general shell section properties in my model in Abaqus. When I run the simulation, there's no stress out put data available. What could be the reason for this?



iMechanica Video's picture

iMechanica Video: Why spaghetti never snaps in half? 130,000 fps slow mo video reveals

Challenge yourself to snap a spaghetti stick in half by bending two ends. It always snaps into three or more pieces, but not two. But why? Indeed this phenomenon has puzzled many people, including the great Richard Feynman, for many years. The puzzle was only solved in recent years. Slow mo videos by ultrahigh speed camera reveal why. Check out this iMechanica Video with 6+ million view on YouTube. 

Emilio Martínez Pañeda's picture

Generalised boundary conditions for hydrogen transport at crack tips

Dear iMechanicians,

I hope the present work is of interest to you. We present a new formulation for resolving the electrochemical-diffusion interface in hydrogen embrittlement modelling 

E. Martínez-Pañeda, A. Díaz, L. Wright, A. Turnbull

Generalised boundary conditions for hydrogen transport at crack tips

Corrosion Science 173, 108698 (2020)

rezaavaz's picture

Postdoctoral position at Texas A&M University

One postdoctoral position is available in the Computational Cardiovascular Bioengineering Lab at the Department of Biomedical Engineering at Texas A&M University. This position will focus on developing and using integrated computational-experimental models of cardiovascular function. Some representative research projects are described here:


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