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Jingjie Yeo's picture

Carbon nanotube arrays as multilayer transverse flow carbon nanotube membrane for efficient desalination

https://doi.org/10.1016/j.memsci.2019.03.062 This work presents the multilayer transverse flow carbon nanotube (CNT) membrane (TFCM), which resembles vertically aligned CNT arrays, as an alternative candidate for efficient desalination. Using molecular dynamics, this work shows that multilayer TFCM can provide permeability and salt rejection on par with its single layer counterpart.

J Mahmud's picture

ICAME 2019 Borneo: 6th International Conference on Advances in Mechanical Engineering

ICAME 2019: 6th International Conference on Advances in Mechanical Engineering

Call for Papers, due 31 May 2019

14 – 16 August 2019, The Pacific Sutera Hotel, Kota Kinabalu, Sabah, Malaysian Borneo

 

Antonio Papangelo's picture

Adhesion of multilayered materials

Adhesion is a key factor in many tribological processes, especially wear. We generalize a recent formulation for the indentation of a multilayered material using an efficient integral transform method, to the case of adhesion, using a simple energetic transformation in the JKR regime. Then, we specialize the study for the geometry of the Surface Force Apparatus, which consists of two thin layers on a substrate, where the intermediate layer is softer than the other two. We find the pull-off force under "force control" (i.e.

Research Associate Position at University of Virginia in Professor Xiaodong (Chris) Li's Lab

The Department of Mechanical and Aerospace Engineering in the School of Engineering and Applied Science at the University of Virginia seeks candidates for a Research Associate to assist in the development of low-cost carbon fiber techniques in Professor Xiaodong (Chris) Li's lab.

cohesive contact behaviour in Abaqus

I am trying to model cohesive contact between analytical rigid and deformable surfaces. cohesive contact is modelled as surface interaction property. Does it work with analytical rigid surfaces. the results are not showing any cohesive contact happening

Webinar: Optimizing AM Parts with Synopsys, NSI and ANSYS, April 25th 2019

 

Date: Thursday, April 25, 2019

Time: 8 am PDT (US West Coast) / 11 am EDT (US East Coast) / 5 pm CEST (Europe)

Duration: 30 min presentations + Q&A

mohsenzaeem's picture

Evolution of solidification defects in deformation of nano-polycrystalline aluminum

Formation of solidification defects and their evolution in uniaxial tensile deformation of solidified polycrystalline aluminum (Al) were investigated by molecular dynamics (MD) simulations. First, solidification process was simulated both isothermally and with different quench rates. At the initial stages of nucleation, coherent twin boundaries and/or fivefold twins formed depending on the quench rate or the undercooling temperature.

rajan_prithivi's picture

How do I do multiple restarts is ABAQUS ?

Hello All,

I have been trying to restart an ABAQUS simulation using the command line. The following works fine

########

abaqus job=restart1.inp oldjob=OLD user=UMAT.f cpus=160 scratch=$PWD interactive

########

But when I do the restart for the second time like the following, It gives me an error

########

Hamed Hatami's picture

Postdoctoral and PhD positions - UIC

There are immediate openings for candidates in the areas of computational solid mechanics and experimental (bio)mechanics in the mechanical engineering department, University of Illinois at Chicago (UIC). 

Candidates with strong background in numerical simulations (FEA, high performance computing, ...), in experimental characterization of materials, or biochemistry and molecular biology are encouraged to apply. 

Arash_Yavari's picture

Nonlinear and Linear Elastodynamic Transformation Cloaking

In this paper we formulate the problems of nonlinear and linear elastodynamic transformation cloaking in a geometric framework. In particular, it is noted that a cloaking transformation is neither a spatial nor a referential change of frame (coordinates); a cloaking transformation maps the boundary-value problem of an isotropic and homogeneous elastic body (virtual problem) to that of an anisotropic and inhomogeneous elastic body with a hole surrounded by a cloak that is to be designed (physical problem).

djuhre's picture

PhD position at the Institute of Mechanics, OVGU Magdeburg, Germany

We have an opening PhD Position at our Institute of Mechanics, Otto von Guericke University Magdeburg (Germany).
The candidate should work in the field of "coupling of fictious domain methods and the boundary element method for the analysis of acoustic metamaterials".
Attached you will find the corresponding job advertisement.
Futher questions will be answered by my postdoc Dr. Fabian Duvigneau (fabian.duvigneau@ovgu.de).

rajan_prithivi's picture

Critical porosity in the fatigue of additively manufactured IN718 via crystal plasticity modeling

https://doi.org/10.1016/j.matdes.2018.04.022

Highlights

1. Critical porosity is estimated in additively manufactured IN718 via crystal plasticity.

2. Porosity is characterized using high resolution tomography.

3. Non-local damage indicator parameters identify the location of fatigue crack initiation.

tongqing.lu's picture

Hydrogel 3D printing with the capacitor edge effect

Recent decades have seen intense developments of hydrogel applications for cell cultures, tissue engineering, soft robotics, and ionic devices. Advanced fabrication techniques for hydrogel structures are being developed to meet user-specified requirements. Existing hydrogel 3D printing techniques place substantial constraints on the physical and chemical properties of hydrogel precursors as well as the printed hydrogel structures. This study proposes a novel method for patterning liquids with a resolution of 100 μm by using the capacitor edge effect.

vicky.nguyen's picture

Seeking Postdoctoral scholar for a join NIST-JHU project on dynamic response of soft materials

The Mechanical Engineering Department at Johns Hopkins University is seeking a postdoctoral fellow to work on a project with the Security Technologies Group in the Material Measurement Laboratory at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD.

 

UIUC-NUS joint Postdocs on Computational modeling of additive manufacturing

Two postdoc positions in computational modeling of metallic additive manufacturing are available immediately in the research groups of Prof. Jinhui Yan at University of Illinois at Urbana-Champaign (UIUC) and Prof. Wentao Yan at National University of Singapore (NUS). Successful candidates need to be self-motivated and have a solid background in mathematics, mechanics, numerical analysis, and programming (Fortran, C/C++, and Python).

Blog: Transforming MRI and CT scans into 3D Models

Being able to create accurate medical devices that are closely matched to a patient’s unique anatomy requires precision imaging, measurements, and design. A critical part of PrinterPrezz’s unique medifacturing™ workflow is our process of turning magnetic resonance imaging (MRI) and computed tomography (CT) scans into a 3D CAD image that can be manipulated and used for 3D printing.

Emilio Martínez Pañeda's picture

Mode I crack tip fields: strain gradient plasticity theory versus J2 flow theory

I hope some of you may find this work interesting. We show, analytically and numerically, that strain gradient plasticity predicts the existence of an inner elastic field adjacent to the crack tip, reminiscent of a dislocation-free zone. The fact that elastic strains dominate plastic strains near the crack tip implies a paradigm-shift with respect to previous crack tip asymptotic studies in plasticity and gradient plasticity, which neglect elastic strains. 

 

Emilio Martínez-Pañeda, Norman A. Fleck

vh's picture

R&D Team Manager, Metallurgy @ Novelis Inc.

This position is strictly for experienced candidates and is located at our Global R&T Centre in Kennesaw GA.

Erik Bitzek's picture

ISAM4 2019 - 4th International Symposium on Atomistic and Multiscale Modeling of Mechanics and Multiphysics

Following the success of three former meetings (Tokyo 2011, Tokyo 2013, Brno 2016), the fourth ISAM4 meeting will be held at FAU Erlangen-Nürnberg, Germany from August 5th to 8th 2019. 

Research Associate in Mechanical and Aerospace Engineering

The Department of Mechanical and Aerospace Engineering in the School of Engineering and Applied Science at the University of Virginia seeks candidates for one Research Associate position to assist in experimental mechanics of advanced materials in Professor Xiaodong (Chris) Li's lab.

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