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reference point for calculating effective elastic properties of RVE

i have implemented pbc condition using 3 reference points .

i want to check the same using homogeneous boundary conditions so how to use reference point for that

PhD Scholarship in Structural Engineering and Computational Mechanics

A PhD scholarship is immediately available at the School of Engineering and Mathematical Sciences, La Trobe University (Melbourne Campus) to develop numerical models to predict the response of steel and composite structures under extreme loading.

Scholarship details

The PhD scholarship offers a stipend of $26,288 per annum up to three years (see http://www.latrobe.edu.au/research/future/costs-scholarships/apa-ltuprs)

Eight (8) industry related PhD positions in Europe - Advanced Model Reduction

Empowered decision-making in simulation-based engineering:
Advanced Model Reduction  (AdMoRe) for
 real-time, inverse and optimization in industrial problems. Partner Organizations

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S. Beretta's picture

Simulation of crack growth in Ni-based single crystals

In a cooperative research between PoliMi and UIUC we have analyzed the crack growth in Ni-based single crystals:

http://www.sciencedirect.com/science/article/pii/S0142112316000840

 Crack growth experiments analyzed with DIC had shown relatively low closure levels respect to polycrystals. Crystal plasticity simulations with WARP3D have been able to simulate closure levels consistent with the experimental ones.

Christopher R. Weinberger's picture

Journal Club Theme of April 2016: Boundary conditions in atomistic simulations for extended defects in solids

Boundary conditions in atomistic simulations for extended defects in solids

Christopher Weinberger 1, Lucas Hale 2 and Ian Bakst 1

1 Department of Mechanical Engineering and Mechanics, Drexel University

2 Materials Science and Engineering Division, NIST

 

Introduction

Application of Bernoulli equation in cold forming of Steel

Hi All

I know it might sound weird, but can I use the bernoulli equation to know the velocity of steel running in thinner throtles in cold forming, that might have a higher velocity, via analytic method. in this condition, the metal is not so much like a fluid, but it's deforming ,and it's behavior and speed is different when it passes in different cross section areas

Avinash Dongare's picture

Graduate Student/Postdoctoral Position (US Persons only): Atomic scale and Mesoscale Modeling Materials at the University of Connecticut

The Computational Materials & Mechanics Group (CMMG) at the University of Connecticut has an immediate opening for a graduate student and/or a postdoctoral researcher in the area of modeling of impact behavior of materials at the mesoscale. The position is open for US persons only (US citizenship or Permanent Residency required).

Jingjie Yeo's picture

Adsorption and Conformational Evolution of Alpha-Helical BSA Segments on Graphene: A Molecular Dynamics Study

http://dx.doi.org/10.1142/S1758825116500216 Molecular dynamics (MD) simulations are performed to investigate the adsorption mechanics and conformational dynamics of single and multiple bovine serum albumin (BSA) peptide segments on single-layer graphene through analysis of parameters such as the root-mean-square displacements, number of hydrogen bonds, helical content, inter- action energies, and motions of mass center of the peptides.

Ravi-Chandar's picture

Post-doctoral Position in Biomechanics at University of Texas

The Research Center for Mechanics of Solids, Structures and Materials at the University of Texas at Austin invites applications for an open position as Post-doctoral Fellow. The specific project involves collaboration with the University of Texas MD Anderson Cancer Center in Houston and requires the Fellow to work at both institutions. The work involves experimental characterization of tissues and surgical remodeling, and development of computational modeling of surgical reconstruction.

Harold S. Park's picture

Negative Poisson's Ratio in Single-Layer Graphene Ribbons

The Poisson's ratio characterizes the resultant strain in the lateral direction for a material under longitudinal deformation.  Though negative Poisson's ratios (NPR) are theoretically possible within continuum elasticity, they are most frequently observed in engineered materials and structures, as they are not intrinsic to many materials.  In this work, we report NPR in single-layer graphene ribbons, which results from the compressive edge stress induced warping of the edges.

stefanogonella's picture

PhD position in mechanics of metamaterials at the University of Minnesota

A PhD position is available in the group of Prof. Stefano Gonella at the University of Minnesota Twin-Cities. (http://personal.cege.umn.edu/~gonella/) in the area of wave mechanics of advanced materials, with focus on elastic and acoustic metamaterials.

Current topics of interest are: 1) mechanics of nonlinear metamaterials (including soft architected materials, nonlinear lattices and granular crystals) and 2) tunable and reconfigurable metamaterials.

Zheng Jia's picture

Failure Mechanics of a Wrinkling Thin Film Anode on a Substrate under Cyclic Charging and Discharging

Zheng Jia, Teng Li, Failure Mechanics of a Wrinkling Thin Film Anode on a Substrate under Cyclic Charging and Discharging, Extreme Mechanics Letters, accepted, 2016 (DOI:doi:10.1016/j.eml.2016.03.006)

 

Overhead Electrical Conductor in bending: Papailiou's model revisited

 In a paper to appear and available online,( An analytical approach to model the hysteretic bending behavior of spiral strands, Applied Mathematical Modeling 2016, http://www.sciencedirect.com/science/article/pii/S0307904X16300592 )

Pattern formation in plastic liquid films on elastomers by ratcheting

See our newly discovered phenomena, Pattern formation in plastic liquid films on elastomers by ratcheting

Here is the abstract:

ASCE AND EMI 2016 AWARD RECIPIENTS


ASCE announced the winners of six of its prestigious Society awards administered by its Engineering Mechanics Institute (EMI):

2016 Maurice A. Biot Medal: Ronaldo I. Borja, Ph.D., A.M.ASCE, Stanford University

2016 Jack E. Cermak Medal: Qiusheng Li, Ph.D., City University of Hong Kong

Kumar Ankit's picture

Influence of substrate interaction and confinement on electric-field-induced transition in symmetric block-copolymer thin films

In the present work, we study morphologies arising due to competing substrate interaction, electric field, and confinement effects on a symmetric diblock copolymer. We employ a coarse-grained nonlocal Cahn-Hilliard phenomenological model taking into account the appropriate contributions of substrate interaction and electrostatic field. The proposed model couples the Ohta-Kawasaki functional with Maxwell equation of electrostatics, thus alleviating the need for any approximate solution used in previous studies.

3rd International Conference on BioTribology (ICoBT2016)

W. Gregory Sawyer, University of Florida, USA will be the Plenary Speaker at ICoBT2016

Research Fellow (Post-doc) position in Micromechanical Modelling of Lithium-Ion Batteries

The post is funded through a recently awarded four year European H2020 research project SINTBAT (Silicon based materials and new processing technologies for improved lithium-ion batteries), and coordinated by VARTA.

Arun Prakash's picture

Nanosculpt: A methodology for generating complex realistic configurations for atomistic simulations

Atomistic simulations have now become commonplace in the study of the deformation and failure of materials. Increase in computing power in recent years has made large-scale simulations with billions, or even trillions, of atoms a possibility. Nevertheless, most simulations to-date, are still performed with quasi-2D geometries or rather simplistic 3D setups. Although controlled studies on such well-defined structures are often required to obtain quantitative information from atomistic simulations, for qualitative studies focusing on e.g. the identification of mechanisms, researchers would greatly benefit from a methodology that helps realize more realistic configurations. The ideal scenario would be a one-on-one reconstruction of experimentally observed structures. NanoSCULPT allows you to do precisely this for both crystalline and amorphous structures.

PhD Vacancy: UK Centre for Doctoral Training in Fusion Energy

I am currently looking to fill an open PhD position in a project titled:

Advanced Virtual Design of 3D Printed Fusion Reactor Components

This is to continue recent work that uses X-ray tomography, high performance computing and finite element analysis to design the plasma facing wall of the ITER reactor. Recent related publications can be found below:

Arash_Yavari's picture

A Geometric Theory of Nonlinear Morphoelastic Shells

We formulate a geometric theory of nonlinear morphoelastic shells that can model the time evolution of residual stresses induced by bulk growth. We consider a thin body and idealize it by a representative orientable surface. In this geometric theory, bulk growth is modeled using an evolving referential configuration for the shell (material manifold). We consider the evolution of both the first and second fundamental forms in the material manifold by considering them as dynamical variables in the variational problem.

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