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Teng zhang's picture

Deriving a lattice model for neo-Hookean solids from finite element methods

Lattice models are popular methods for simulating deformation of solids by discretizing continuum structures into spring networks. Despite the simplicity and efficiency, most lattice models only rigorously converge to continuum models for lattices with regular shapes. Here, we derive a lattice model for neo-Hookean solids directly from finite element methods (FEM). The proposed lattice model can handle complicated geometries and tune the material compressibility without significantly increasing the complexity of the model.

Funded PhD positions at the University of Southampton (Marie-Curie Fellows)

Two PhD positions are available at the University of Southampton in the areas of:

(1) Computational modelling of complex structures and structured materials - especially those fabricated using additive manufacturing,


(2) Elastic and acoustic metamaterials using additive manufacturing.

mmalekan's picture

What topics are still under development using phase-field modeling?

Dear colleagues,

I wonder to know what topics are still under development using phase field (PF) modeling?

The PF has already applied to 2D, 3D, and shell structures, incorporating homogeneous, inhomogeneous, and heterogeneous materials. It also applied to brittle, ductile, dynamic, cohesive, finite deformation, and multi-field fractures. What else we can model using PF method?



Harold S. Park's picture

Post-Doctoral Position in Computational Modeling of Topological Insulators

I am looking to recruit a highly motivated and independent postdoctoral researcher to study, via the development of new computational techniques, various scientific issues surrounding phononic topological insulators.  The position is available for a 1-year duration, with possible extension to future years depending on the availability of funding.  

Requirements for the position include:

1.  A strong background in computational solid mechanics, and in particular topology optimization techniques (i.e. level set-based)

Jingjie Yeo's picture

Effects of CNT size on the desalination performance of an outer-wall CNT slit membrane We investigate the effect of varying carbon nanotube (CNT) size on the desalination performance through slit confinements formed by horizontally aligned CNTs stacked on top of one another. By increasing the CNT size, the results obtained from this study indicate a corresponding increase in the water flow rate, accompanied by a slight reduction in salt rejection performance.

Amit Acharya's picture

A design principle for actuation of nematic glass sheets

(in Journal of Elasticity)

A continuum mechanical framework is developed for determining a) the class of stress-free deformed shapes and corresponding director distributions on the undeformed configuration of a nematic glass membrane that has a prescribed spontaneous stretch field and b) the class of undeformed configurations and corresponding director distributions on it resulting in a stress-free given deformed shape of a nematic glass sheet with a prescribed spontaneous stretch field. The proposed solution rests on an understanding of how the Lagrangian dyad of a deformation of a membrane maps into the Euleriandyad in three dimensional ambient space. Interesting connections between these practical questions of design and the mathematical theory of isometric embeddings of manifolds, deformations between two prescribed Riemannian manifolds, and the slip-line theory of plasticity are pointed out.

ahmedettaf's picture

Strain Localization in Dry Sheared Fault Gouge: A Compactivity based approach

Abstract: Shear banding is widely observed in natural fault zones as well as in laboratory experiments on granular materials. Understanding the dynamics of strain localization under different loading conditions is essential for quantifying strength evolution of fault gouge and energy partitioning during earthquakes and characterizing rheological transitions and fault zone structure changes. To that end, we develop a physics-based continuum model for strain localization in sheared granular materials.

ahmedettaf's picture

Mechanics and Mussel adhesion: How bulk porosity may help things stick better

On the Role of the Plaque Porous Structure in Mussel Adhesion: Implications for Adhesion Control Using Bulk Patterning

Ahmed Ghareeb and Ahmed Elbanna -- Journal of Applied Mechanics (2018)


yuzhen's picture

Geometric role in designing pneumatically actuated pattern-transforming metamaterials

Geometric role in designing pneumatically actuated pattern-transforming metamaterials

Yuzhen Chen, Lihua Jin

Extreme Mechanics Letters

Mahdi Z.'s picture

The Effects of Intra-membrane Viscosity on Lipid Membrane Morphology: Complete Analytical Solution

We present a linear theory of lipid membranes which accommodates the effects of intra-membrane viscosity into the model of deformations. Within the Monge parameterization, a linearized version of the shape equation describing membrane morphology is derived. Admissible boundary conditions are taken from the existing non-linear model but reformulated and adopted to the present framework. We obtain a complete analytical expression illustrating the deformations of lipid membrane subjected to the influences of intra-membrane viscosity.

Siva P V Nadimpalli's picture

Effect of Stress on the Chemical Diffusion Coefficient of Li in High-Energy-Density Electrodes

In Situ Measurement of the Effect of Stress on the Chemical Diffusion Coefficient of Li in High-Energy-Density Electrodes 

Rajasekhar Tripuraneni, Subhajit Rakshit, and Siva Nadimpalli

Refat_Islam's picture

Mechanical behavior of mycelium-based particulate composites

We study the mechanical behavior of mycelium composites reinforced with biodegradable agro-waste particles. In the composite, the mycelium acts as a supportive matrix which binds reinforcing particles within its filamentous network structure. The compressive behavior of mycelium composites is investigated using an integrated experimental and computational approach.

Two Fully-funded PhD Positions in Additive Manufacturing

The National Center for Additive Manufacturing Excellence (NCAME) at Auburn University is announcing for two fully-funded PhD positions in the area of structural integrity of additive manufactured (AM) materials/parts. These students will work under direction of Dr. Shamsaei from Mechanical Engineering Department. These opportunities include;
1- One PhD student is expected to work on experimental and analytical mechanics, additive manufacturing, fatigue testing and modeling, failure analysis, microstructural characterization, and fracture mechanics.
2- The second PhD student will implement computational mechanics to investigate structural integrity of AM parts. The candidate for this position should have background on crystal plasticity and finite element analysis. This candidate is also expected to be familiar with a finite element software including writing subroutines.
If interested, please send your resume and a cover letter, briefly explaining your relevant experience and publications to Dr Vaziri (

Emilio Martínez Pañeda's picture

Size effects in elastic-plastic functionally graded materials

I hope some of you may find this work interesting:

Size effects in elastic-plastic functionally graded materials

Tittu V. Mathew, Sundararajan Natarajan, Emilio Martínez-Pañeda

Composite Structures, 204, pp. 43-51 (2018)

A post-print is available at

vacary's picture

New book. Advanced Topics in Nonsmooth Dynamics.

Dear colleagues,

We are pleased to announce the publication of the transactions of the European Network on nonsmooth Dynamics edited by R. Leine, V. Acary and O. Bruls



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