iMechanica

The 8th World Congress on Integrated Computational Materials Engineering (ICME 2025) will be held in Anaheim Marriot • Anaheim, California, USA June 15–19, 2025

Submit your abstracts to ICME 2025 by October 30!

www.tms.org/ICME2025

Gabriel Dante Lima-Chavez,        Amit Acharya,          Manas V. Upadhyay

A geometrically nonlinear theory for field dislocation thermomechanics based entirely on measurable state variables is proposed. Instead of starting from an ordering-dependent multiplicative decomposition of the total deformation gradient tensor, the additive decomposition of the velocity gradient into elastic, plastic and thermal distortion rates is obtained as a natural consequence of the conservation of the Burgers vector. Based on this equation, the theory consistently captures the contribution of transient heterogeneous temperature fields on the evolution of the (polar) dislocation density. The governing equations of the model are obtained from the conservation of Burgers vector, mass, linear and angular momenta, and the First Law. The Second Law is used to deduce the thermodynamical driving forces for dislocation velocity. An evolution equation for temperature is obtained from the First Law and the Helmholtz free energy density, which is taken as a function of the following measurable quantities: elastic distortion, temperature and the dislocation density (the theory allows prescribing additional measurable quantities as internal state variables if needed). Furthermore, the theory allows one to compute the Taylor-Quinney factor, which is material and strain rate dependent. Accounting for the polar dislocation density as a state variable in the Helmholtz free energy of the system allows for temperature solutions in the form of dispersive waves with finite propagation speed, despite using Fourier’s law of heat conduction as the constitutive assumption for the heat flux vector.

In this paper, we formulate a continuum theory of solidification within the context of finite-strain coupled thermoelasticity. We aim to fill a gap in the existing literature, as the existing studies on solidification typically decouple the thermal problem (the classical Stefan's problem) from the elasticity problem, and often limit themselves to linear elasticity with small strains.

Description

There are several doctoral and postdoctoral openings in the field of civil and ocean engineering at Tsinghua University. The project will employ a multiscale approach combining theoretical modelling, numerical simulations, and structural/material investigations. Candidates having a background in materials, structures, AI-aided computing, and design are encouraged to apply. Successful applicants will join the group of Prof. Yutao Guo at the Shenzhen International Graduate School of Tsinghua University in Shenzhen, China. Find the details in the attached. 

Pathrudkar, S., Thiagarajan, P., Agarwal, S. et al. Electronic structure prediction of multi-million atom systems through uncertainty quantification enabled transfer learning. npj Comput Mater 10, 175 (2024). https://doi.org/10.1038/s41524-024-01305-7 

Ponkrshnan Thiagarajan, Trisha Sain, Susanta Ghosh, "Bayesian calibration and uncertainty quantification of a rate-dependent cohesive zone model for polymer interfaces", Engineering Fracture Mechanics,

Volume 309, 2024, 110374, ISSN 0013-7944, https://doi.org/10.1016/j.engfracmech.2024.110374.

The Artificial Organs Lab in the Department of Surgery at the University of Maryland, Baltimore, is a national leader in the development of artificial lungs and hearts, with a focus on blood-contacting devices such as circulatory support systems, extracorporeal membrane oxygenation (ECMO), and blood pumps. The lab is led by a multidisciplinary team of engineers and clinicians, with expertise spanning the engineering, clinical, and scientific aspects of medical devices.

Folks - see the new fellowship opportunity for women interested in nanolithography. I've interacted with this research center, and they are a very high quality institute with a unique focus bridging fundamental science and industry collaboration through translational research. The research cuts across many disciplines and includes a focus on tribology, among many other topics.

The Cardiovascular Tissue Mechanics Lab at Emory University has an immediate opening for a postdoc position in cardiovascular fluid-structure interaction (FSI) simulation. Candidates who have a background in FSI simulation, CFD and/or related fluid mechanics are highly encouraged to apply. The position could include a secondary affiliate appointment at Georgia Tech, providing access to resources at both Emory University and Georgia Tech.

Abstract

Advancements in smart soft materials are enhancing the capabilities of robotic manipulators in object interactions and complex tasks. Mechanochromic materials, acting as lightweight sensors, offer easily interpretable visual feedback for localized stress detection, structural health monitoring, and energy-efficient robotic skins.

PhD Scholarship for 3 years, in Technical University of Denmark, in Roskilde (30 km from Danish capital, Copenhagen). 

Deadline for application: November 10.

Start of work: between March and May 2025.

Your background: Master degree in Mechanics, Materials science or related topics. Knowledge of finite element modelling, strength of materials, Abaqus, and programmingh languages, preferably Python (numpy). Demonstrated experience in preparing scientific publications is an advantage. 

Webinar:  Join Zoom Meeting

Dear Colleagues,

Our speaker will be Prof. Michele Ceriotti from EPFL.

We look forward to seeing you there.

Date/Time: September 25; 2-3pm CST

I am looking for a postdoctoral research assistant to join my group at the University of Oxford to study the mechanical and degradation behaviour of biodegradable polymers. The position is to be filled as soon as possible, with a fixed term contract until 31st July 2026. Possible extension will depend on funding availability.

I am looking to recruit 1-2 PhD students to start at the Department of Mechanical Engineering at Boston University in Fall (September) 2025.  I am interested in working with students with a background and passion for computational and applied mechanics at the continuum scale, applied to modern scientific problems.  My specific recent research interests lie in: (1) Elastogranular mechanics; (2) Non-traditional forms of computing and physical intelligence; (3) Topological mechanics and dynamics; (4) Coupled physics phenomena.  My work is generally collaborative with other ex

We have multiple (Direct) PhD positions in the field of micromechanics of polycrystals, e.g., metals and alloys as well as ceramics. Our research focuses on finite element modelling and diffraction-based characterization of deformation and fracture of polycrystalline materials. Currently our research themes include:

Applications are invited for a 2-year postdoc position in the area of crystal plasticity and finite element modeling of advanced materials. This position is a full-time position at the University of Western Ontario, Canada, and the selected applicant can start effective immediately.

Postdoc Opening in Computational Materials Research

Qualifications:

o   Ph.D. in Mechanical Engineering or related fields

o   Proficiency in finite element modeling and simulation

o   Substantial experience with computational mechanics, fracture mechanics, and machine learning

Fluid Mechanics:

Variational dual solutions for incompressible fluids

Amit Acharya, Bianca Stroffolini, Arghir Zarnescu

Nonlinear Elasticity:

A hidden convexity of nonlinear elasticity

Siddharth Singh, Janusz Ginster, Amit Acharya

Wanliang Shan

Associate Professor of Mechanical and Aerospace Engineering

Syracuse University

Introduction

The Extreme Mechanics Letters (EML) Young Investigator Award (YIA) 2024 edition is organized by the journal and Elsevier to honor the best paper by a young scientist. The papers must have been published in volumes 63-69, from 2023 to 2024.

Mechanical properties of materials are usually measured by simple one-dimensional tests. The growing field of data-driven mechanics requires development of experimental methods to obtain large quantities of multi-axial data from a single test. To complement this data is the requirement to develop computational methods that can deal with the inevitable measurement noise.