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Jingjie Yeo's picture

Journal Club for September 2020: The Biofilm Matrix - A Living Engineering Material

The Biofilm Matrix - A Living Engineering Material

Chenxi Zhai, Haoyuan Shi, Tianjiao Li, Liming Zhao, Jingjie Yeo

J2 Lab for Engineering Living Materials, Sibley School of Mechanical and Aerospace Engineering, Cornell University


Tapered elasticæ as a route for axisymmetric morphing structures

Dear Colleagues,

I'd like to share our recent paper on the inverse design framework of shape-morphing structures published in Soft Matter. It is open access, and you can download it via:

Tapered elasticæ as a route for axisymmetric morphing structures

miquel.aguirre's picture

Beam to surface contact dynamics using a corotational formulation and discrete SDF

Please check our new article on beam to surface contact modeling, recently accepted in  Computer Methods in Applied Mechanics and Engineering: . We have used a previously reported dynamic corotational formulation and added frictional contact terms, which provide a fully consistent formulation.

Jinxiong Zhou's picture

Modeling SMA-enabled soft deployable structures for kirigami/origami reflectors

The synergic combination of smart soft composites with kirigami/origami principles leads to self-deployable systems. To date, the development of soft deployable structures has largely been an empirical process. Focusing on the recently developed shape memory alloy (SMA)-based soft deployable structures, this paper describes an analytical model and a finite element (FE) numerical scheme to investigate deformation and deployment performance of this system.

Baohong Chen's picture

EASF Webinar Episode 7, Sunday, August 23.

EASF homepage:

Time: Every Sunday

London: 3:00-4:30 pm

Beijing: 10:00-11:30 pm

Wenbin Yu's picture

Global Composites Experts Webinar Series

Composites Design and Manufacturing HUB (cdmHUB) invites you to attend the Global Composites Experts Webinar series. The goal of the series is to accumulate the vast knowledge of composites that has been developed over the past 50 years and to make it available to the global composites community. The inaugural lecture entitled Digital Disruption of Composites Manufacturing and Design will be given by Prof. Anoush Poursartip on September 3rd 11am-12pm EDT. Please visit for more details.

Teng Li's picture

EML Webinar by Prof. Xi-Qiao Feng on 26 August 2020: Dynamics of Collective Cells

EML Webinar on 26 August 2020 will be given by Professor Xi-Qiao Feng, Tsinghua University via Zoom meeting. Discussion leader: Professor Wei Yang, Zhejiang University

Title: Dynamics of Collective Cells

Emilio Martínez Pañeda's picture

A phase field model for elastic-gradient-plastic solids undergoing hydrogen embrittlement

Dear iMechanicians,

I hope some of you find our recent JMPS paper interesting. We combine phase field fracture, hydrogen transport and strain gradient plasticity to provide a modern rationale to the mechanism of hydrogen enhanced decohesion. 

A phase field model for elastic-gradient-plastic solids undergoing hydrogen embrittlement

Philip K. Kristensen, Christian F. Niordson, Emilio Martínez-Pañeda

Journal of the Mechanics and Physics of Solids, 143, 104093 (2020)

Advances in Applied Mechanics Ranked First in Computational Mechanics

Please contact me and Daniel Balint, should you be interested in contributing an authoritative review or white paper.


Stéphane Bordas

Teng Li's picture

EML Webinar by Prof. Markus Buehler on 19 August 2020: The Mechanics of Biomateriomics

EML Webinar on 19 August 2020 will be given by Professor Markus Buehler, MIT via Zoom meeting. Discussion leader: Professor Grace Gu, UC Berkeley

Title: The mechanics of biomateriomics

Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on 19 August 2020

Modelling and evaluating multiple constituent alloys in LAMMPS

Choose a channel featured in the header of iMechanica: 

I have the following questions.

  1. How to model alloy in LAMMPS? How to automatically randomize the position of atoms of various types?
  2. Also how to evaluate the mechanical properties such as Elastic modulus and Fracture toughness?
  3. Is it possible to model interface fracture using LAMMPS?
emuna's picture

Inflation induced twist in geometrically incompatible isotropic tubes

We propose a new layered configuration of isotropic tubes that twists upon inflation, based on the concept of geometric incompatibilities. For more details click "Read more" below. The full paper can be found at:


Lixiang Yang's picture

Revisit initiation of localized plastic deformation: Shear band & necking

Hello Dear All,

    Thanks to Extreme Mechanics Letter, a new discusion of localized plastic deformation was published there. Three outlines of our work are:

      1. A new dislocation based consitutive model is built. It has a concise mathematical struture.

      2. Heat generated by plastic energy can be calculated by a mechanical version of Joule's law.

      3. Shear band and neck locations can be predicted by the mathematical model.

Phanish Suryanarayana's picture

Bending moduli for forty-four select atomic monolayers from first principles

We calculate bending moduli along the principal directions for forty-four select atomic monolayers using ab initio density functional theory (DFT). Specifically, considering representative materials from each of Groups IV, III–V, V monolayers, Group IV monochalcogenides, transition metal trichalcogenides, transition metal dichalcogenides and Group III monochalcogenides, we utilize the recently developed Cyclic DFT method to calculate the bending moduli in the practically relevant but previously intractable low-curvature limit.

Teng Li's picture

EML Webinar by Prof. Ellen Kuhl on 12 August 2020: Data-driven modeling of COVID-19—Lessons learned

EML Webinar on 12 August 2020 will be given by Professor Ellen Kuhl, Standard University via Zoom meeting. Discussion leader: Professor Pradeep Sharma, University of Houston.

Title: Data-driven modeling of COVID-19—Lessons learned

oliver oreilly's picture

Ever wonder what the modes of vibration of a rod contacting a surface look like?

Dear Colleague,

Our latest work on the dynamics of rods contacting rigid surfaces has just appeared:

N. N. Goldberg and O. M. O'Reilly, On contact point motion in the vibration of elastic rods, Journal of Sound and Vibration, 2020. 

Zhaohe Dai's picture

Mechanics at the interfaces of 2D materials

Dear iMechanica researchers,

I'd like to share an opinion paper that was written by Rui Huang, Kenneth Liechti, Nanshu Lu, and I for Current Opinion in Solid State & Materials Science. The aim is to discuss the mechanics research on 2D material interfaces in terms of recent developments and appeared challenges and opportunitiesHere is the link; Below, I also attached a copy of the manuscript and pasted the Abstract.

Antonio Papangelo's picture

Electroadhesive sphere-flat contact problem

The electroadhesive contact between a conductive sphere with a rigid substrate, both coated with an electrically insulating layer is studied, by adopting two solution strategies: (i) a DMT approximation and (ii) an iterative finite element model which accounts for the effect of the electroadhesive tractions on the deformation of the elastic solids. The contact problem is solved by varying the applied voltage and the elastic modulus of the coating layer.

Fan Xu's picture

A finite strain model predicts oblique wrinkles in stretched anisotropic films

Transverse wrinkles commonly occur in a uniaxially tensile elastic membrane and can vanish upon excess stretching. The wrinkling direction is usually perpendicular to the stretching direction under isotropic elasticity. Here, we show that wrinkles are orientable by material anisotropy, such as in fiber-reinforced or fibrous films, and the wrinkling orientation can be tuned by varying the stiffness and direction of fibers.

Ramathasan Thevamaran's picture

A Postdoctoral Research Associate Position at the University of Wisconsin-Madison

A Postdoctoral Research Associate Position is available (Fall 2020) in Professor R. Thevamaran’s laboratory at the Department of Engineering Physics of the University of Wisconsin-Madison to study the dynamic behavior of hierarchical materials.


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