iMechanica

We have an immediate opening for a research engineer (postdoctoral researcher) to perform research on the physical and mechanical properties of energy storage materials. 

 Requirements:

·Experience in performing experimental mechanical testing in conjunction with computation mechanics analysis (e.g., finite element)

·U.S. Citizenship is required

Citation metrics are widely used and misused.  Ioannidis and co-authors have created a publicly available database of 100,000 top scientists that provides standardized information on citations, h-index, coauthorship-adjusted hm-index, citations to papers in different authorship positions, and a composite indicator.

A new family of mixed finite element methods --- compatible-strain mixed finite element methods (CSFEMs) --- are introduced for three-dimensional compressible and incompressible nonlinear elasticity. A Hu-Washizu-type functional is extremized in order to obtain a mixed formulation for nonlinear elasticity. The independent fields of the mixed formulations are the displacement, the displacement gradient, and the first Piola-Kirchhoff stress. A pressure-like field is also introduced in the case of incompressible elasticity.

Link to Rajat Arora's blog

Please take a look at our newest paper in Extreme Mechanics letters. In this paper we investigate why Peano-HASEL (Hydraulically Amplified Self-healing Electostatic) actuators zip inhomogeneously at large loads. We develop a theoretical model to explain the phenomenon and validate it experimentally. We show that inhomogeneous zipping increases the blocking force of Peano-HASEL actuators by ~50% compared to homgenous zipping. Even though our analysis is limited to Peano-HASEL actuators, the physical principle is valid for other geometries of HASEL acutators, too.

Multiple PhD positions are now available in the department of Mechanical Engineering at the University of Vermont starting Fall 2020. Successful candidates will be under the supervision of Dr. Jihong Ma. Dr. Ma’s research focuses on understanding the physical properties of materials with complex structures at multiple scales (from nano- to macroscale) via a combination of theoretical analysis, numerical simulations and experimental characterizations. The goal is to uncover or enhance material performance characteristics for industrial, medical, and aerospace applications.

We develop and demonstrate the first general computational tool for finite deformation static and dynamic dislocation mechanics. A finite element formulation of finite deformation (Mesoscale) Field Dislocation Mechanics theory is presented. The model is a minimal enhancement of classical crystal/J_2 plasticity that fundamentally accounts for polar/excess dislocations at the mesoscale. It has the ability to compute the static and dynamic finite deformation stress fields of arbitrary (evolving) dislocation distributions in finite bodies of arbitrary shape and elastic anisotropy under general boundary conditions. This capability is used to present a comparison of the static stress fields, at finite and small deformations, for screw and edge dislocations, revealing heretofore unexpected differences. The computational framework is verified against the sharply contrasting predictions of geometrically linear and nonlinear theories for the stress field of a spatially homogeneous dislocation distribution in the body, as well as against other exact results of the theory. Verification tests of the time-dependent numerics are also presented. Size effects in crystal and isotropic versions of the theory are shown to be a natural consequence of the model and are validated against available experimental data. With inertial effects incorporated, the development of an (asymmetric) propagating Mach cone is demonstrated in the finite deformation theory when a dislocation moves at speeds greater than the linear elastic shear wave speed of the material.

Paper can be found at link Finite_Deformation_Dislocation_Mechanics.

My sincere congatulations to prof Nick Spencer for a well deserved achievement.   A lifelong dedication to many important problems of tribology, the creation of a world class lab, and editing of an important journal (Trib Lett) are just a few of many achievements of Nick.    see here.  

Laboratory of Ocular Biomechanics, University of Pittsburgh.
We are looking for a highly motivated postdoc to join our team to work on Digital image correlation and Virtual fields modeling. Candidates must have experience in these techniques. Experience analyzing images from optical coherence tomography or microscopy will be an advantage. Experience in ophthalmology or vision science is not required. A solid publication record and evidence of strong writing and presentation skills is required.

Laboratory of Ocular Biomechanics, University of Pittsburgh.

We are looking for a highly motivated postdoc to join our team to study the mechanics of fibrous materials. Candidates must have expertise in the mechanics of materials with long fibers, such as fabrics and textiles, or of soft tissues, such as tendon or heart valves. Experience in multi-scale methods is advantageous. The project has experimental and computational elements, and therefore candidates with experience and/or interests in either will have equal opportunity to be selected. Experience with biological samples or soft tissues is preferred but not required. Similarly, experience in ophthalmology or vision sciences is not required. A solid publication record and evidence of strong writing and presentation skills will be an advantage.

The Design & Uncertainty Quantification group at The University of Iowa, led by Professor Sharif Rahman, is looking for new Ph.D. students, who are capable of and interested in performing high-quality research on uncertainty quantification and stochastic design optimization. The research, supported by U.S. National Science Foundation, requires building a solid mathematical foundation, devising efficient numerical algorithms, and developing practical computational tools, all associated with stochastic analysis and design of complex materials and structures.

I am seeking enthusiastic students and recent graduates to join my group at the University of Missouri - Columbia to work on the nonlinear structural mechanics of folded and 3D printed materials such as origami tessellations and lattices. Positions are available at the level of Graduate Research Assistants and Postdoctoral Fellows. Candidates with background in nonlinear finite element analysis are particularly encouraged to apply.

The Department of Engineering at Aarhus University has a number of open positions as Assistant Professor (tenure track) or Associate Professor at the Section of Mechanical Engineering. The University seeks innovative and visionary engineers/researchers capable of developing the research in Mechanical Engineering.

The positions are available from January 1, 2020 or as soon as possible hereafter.

A very interesting recent paper by Dalvi et al. has demonstrated convincingly with adhesion experiments of a soft material with a hard rough material that the simple energy idea of Persson and Tosatti works reasonably well, namely the reduction in apparent work of adhesion is equal to the energy required to achieve conformal contact. We demonstrate here that, in terms of a stickiness criterion, this is extremely close to a criterion we derive from BAM (Bearing Area Model) of Ciavarella, and not very far from that of Violano et al.

The Department of Engineering at Aarhus University has a number of open positions as Assistant Professor (tenure track) or Associate Professor at the Section of Mechanical Engineering. The University seeks innovative and visionary engineers/researchers capable of developing the research in Mechanical Engineering.

The positions are available from January 1, 2020 or as soon as possible hereafter.

Follow the link for details:

We are seeking to appoint an enthusiastic and talented Academic Associate to contribute to research and teaching in the Department of Engineering at Nottingham Trent University. Most of the teaching will be in the format of seminars, laboratory classes and tutorials. The academic associate post is part-time (0.5 FTE) and in addition, you will be required to register for a PhD part-time for the duration of the 5-year post.

PhD Title: 3D Printing of Smart Shape Memory Materials for Advanced Sensors and Actuators

Title: Modeling and Simulation Engineer
Category: Full-time position in industry
Employer: Schlumberger Technology Corporation
Location: United States, Texas, Sugar Land
Opening Date: 08/01/2019

To apply, please submit your resume and a list of 3 references to JShi2@slb.com.

Introduction

We have an opening for a post-doc position at George Mason University starting in the beginning of October. The preferred qualification for the position is a strong background in computational fluid dynamics involving short-duration dynamic loads (e.g. underwater explosion). Expertise in fluid-structure interaction is a plus. Candidates from aerospace, mechanical, civil, and related engineering areas will be considered. Inquiries can be sent directly to Girum Urgessa at gurgessa@gmu.edu with a CV/resume attached.

https://doi.org/10.1088/1361-651X/ab3b62

Abstract

Abstract

Tensile grip jaw selection plays an important role for successful mechanical tests as if specimen slippage between the jaws occurs or if the specimen breaks or tears in the jaw area testing may need to be discarded. This post covers the available jaw surface types for tensile grips and also the operation of quick-change type jaws.

Introduction

Hi Friends,

IMMEDIATE REQUIREMENT!!!

The position is under Assoc Prof Aravind Dasari, from School of Material Science and Engineering. Please see the attached job description.

Swaroop