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Refat_Islam's picture

Parameters controlling the strength of stochastic fibrous materials

Many materials of everyday use are fibrous and their strength is important in most applications. In this work we study the dependence of the strength of random fiber networks on structural parameters such as the network density, cross-link density, fiber tortuosity, and the strength of the inter-fiber cross-links. Athermal networks of cellular and fibrous type are considered. We conclude that the network strength scales linearly with the cross-link number density and with the cross-link strength for a broad range of network parameters, and for both types of networks considered.

Shuozhi Xu's picture

A Ph.D. student position in the research area of atomistic and multiscale simulation modeling at the Louisiana Tech University

The College of Engineering and Science at Louisiana Tech University is seeking self-motivated candidates for a Graduate Research Assistant (Ph.D. student) position, with the earliest starting date in Fall 2019.

gauravmohanty's picture

PhD position: In-situ micromechanical testing

IMPACT is an international Multiscale Materials Testing Research Group at Tampere University. Our work focuses on microscopic and macroscopic mechanical testing of materials at different strain rates and temperatures. We focus on improving the basic scientific understanding of material behaviour under extreme conditions and solving practical industrial problems involving high rate material deformation. IMPACT is looking to hire a Doctoral Researcher (PhD student) in the field of Materials Science to work on micromechanics of materials studied under extreme deformation conditions. 

cdileo's picture

SES 2019 - Mechanics of Electrochemically Active Materials

Colleagues:

The technical meeting of the Society of Engineering Science (SES) will be held at Washington University in St. Louis on October 13-15, 2019. As part of this meeting we are organizing Symposium 7.4 on “Mechanics of Electrochemically Active Materials”. The deadline for abstract submission is April 30

Postdoc Position at UofL

One postdoc position is available in the Department of Mechanical engineering at the University of Louisville. The prospective postdoc should be highly motivated to participate in computational and/or experimental research related to the mechanics and physics of architected materials. We are particularly interested in candidates with experience in solid mechanics, multiscale/multiphysics modeling, topology optimization, and 3D printing. Applicants should submit a full curriculum vitae to yanyu.chen@louisville.edu

stefanogonella's picture

PhD positions in mechanics of metamaterials at the University of Minnesota

PhD positions are available at the University of Minnesota in the group of Prof. Stefano Gonella. The positions are in the general area of mechanics and physics of solids, with emphasis on mechanical metamaterials. The position ideally starts in fall 2019, although a later start date (for example, in January 2020) can be considered.

PhD positions in meta-materials and computational mechanics at Kansas State Univesity

PhD positions in the area of meta-materials, computational mechanics and wave propagation available in the Department of Mechanical and Nuclear Engineering at Kansas State University. Research will be in topics related to the mechanics of meta-structures and the mechanics of amorphous or granular media. 

 

Ravindra Duddu's picture

Open PhD positions in computational mechanics at Vanderbilt University

The Civil and Environmental Engineering department at Vanderbilt University seeks two PhD students interested in computational mechanics, multiscale modeling, wave mechanics and fracture mechanics. Qualified students should have either a bachelors or masters in Civil and Mechanical Engineering, Material Science, Engineering Mechanics or Physics, or other relevant background. 

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.

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