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Antonio Papangelo's picture

Viscoelastic dissipation in repeated normal indentation of an Hertzian profile

Simple exact solutions are known for the indentation problem of a viscoelastic halfspace by a rigid sphere only as long as the contact area is growing. We consider instead a more general cyclic repeated indentation with a pulsating load with a period of zero load. We show that a combination of exact with empirical relaxation solutions coming from simple uniaxial cases is sufficiently accurate to estimate the energy dissipated per cycle, which we report for the standard ”3-elements” solid and periodic half-sine loading for various parameters.

Yaning Li's picture

Journal Club for December 2021: Bio-Inspired 3D Printed Sutures Under Shear

Bio-Inspired 3D Printed Sutures under Shear

Richard Nash and Yaning Li*

Department of Mechanical and Industrial Engineering, Northeastern University, MA


Spectral formulation of the boundary integral equation method for antiplane problems

Spectral formulation of the boundary integral equation method for antiplane problems

Kunnath Ranjith


Katie Matlack's picture

Review article: nonlinearity in phononic materials

FYI our review article on "exploiting nonlinearity in phononic materials to enable nonlinear wave responses" was recently published in Acta Mechanica:


Role of Interface on the Toughening of Thermoplastic-Based Nanocomposites Reinforced with Nanofibrillated Rubber

Optimizing toughening efficiency of nanofibrillated rubber embedded in thermoplastic polymers has always been a challenge. In our work published in Nanoscale journal, by a combined MD-QM method, we demonstrate the roles of interface & interfiber interactions on the toughness and failure mechanisms of rubber-toughened polypropylene nanocomposites.




Kiana Naghibzadeh's picture

Accretion and Ablation in Deformable Solids with an Eulerian Description: Examples using the Method of Characteristics

Dear colleagues,

We invite you to see the preprint of our new paper "Accretion and Ablation in Deformable Solids with an Eulerian Description: Examples using the Method of Characteristics" which will appear in Mathematics and Mechanics of Solids. Recent work has proposed an Eulerian approach to the surface growth problem, enabling the side-stepping of the issue of constructing the reference configuration. However, this raises the complementary challenge of determining the stress response of the solid. To resolve this, the approach introduced the elastic deformation as an additional kinematic descriptor of the added material, and its evolution has been shown to be governed by a transport equation. Here, we applied the method of characteristics to solve concrete simplified problems motivated by surface growth in biomechanics and manufacturing (

Wenbin Yu's picture

Global Composites Expert Webinar by Dr. Philippe Boisse

cdmHUB invites you to attend the Global Composites Experts Webinar Series. 

Title: Fibrous Shell Approach and 3D Second Gradient Modeling for Textile Composite Draping 

Speaker: Dr.  Philippe Boisse

Time: 12/9, 11AM-12PM EST.

Please go to to register for this webinar.

Zeyad I Khalil's picture

A generalised phase field model for fatigue crack growth in elastic–plastic solids with an efficient monolithic solver

Dear iMechanica Community, I hope that you find the below work of interest to you - We present a generalised phase field formulation for metallic fatigue, where cyclic deformation is modelled by means of a combined non-linear kinematic/isotropic hardening law.

jyang526834's picture

Participate in the DVC Challenge 2.0

Hi all,

We at iDICs (International Digital Image Correlation Society) are thrilled to invite you to join the most recent DVC (Digital Volume Correlation) challenge! The DVC Challenge 2.0 has two sub-challenges. The first part is an interlaboratory study on the temporal stability of laboratory X-ray Computed Tomography systems. The second part is to identify available experimental and synthetic images and develop a standardized set of high-quality and other challenging datasets from different imaging modalities, which will be further used for DVC code assessment.

Cemal Basaran's picture

Predicting high cycle fatigue life with unified mechanics theory

50 days' free access to the article. Anyone clicking on this link before December 26, 2021 will be taken directly to the final version of the article on ScienceDirect, which they are welcome to read or download. No signup, registration or fees are required

Effective stiffness as a concave function of inhomogeneity properties

Hi everyone, I am a postdoc at Yale University. I am posting on some of my previous work on fiber networks and heterogeneous materials. We reported that effective stiffness is a concave function of inhomogeneity properties, and effective stiffness becomes smaller with increasing heterogeneity as an example consequence. 


Cemal Basaran's picture

Modeling ultrasonic vibration fatigue with unified mechanics theory

Our new paper on ultrasonic vibration fatigue [a collaboration between 4 universities & 3 countries] is available for free access until  December 21, 2021, 


Wei Gao's picture

Journal Club for November 2021: Machine Learning Potential for Atomistic Simulation


Wei Gao

Department of Mechanical Engineering, University of Texas at San Antonio


In this journal club, we provide a brief summary on the concept, recent progress and tools of machine learning (ML) potential for atomistic materials modelling. We hope that it could benefit to the readers who are new to this filed and plan to develop their own or use others ML potentials. Comments and disscussions are welcomed. 


Amir Siddiq's picture

Hydrogen damage in FCC steel single crystals

Our recent paper on predicting hydrogen damage in FCC steel single crystals. Most important thing about this paper is that the special issue is dedicated to Professor Siegfried Schmauder on his 65th birthday. Happy birthday Professor Schmauder and thanks for all your guidance, support and collaborations throughout my journey which still continues.

Teng Li's picture

EML Webinar (Season 2) on 4 November 2021 by Hanqing Jiang on origami-based metamaterials: mechanics and devices


EML Webinar (Season 2) on 4 November 2021 will be given by Hanqing Jiang on origami-based metamaterials: mechanics and devices. Discussion leader: Pradeep Sharma, University of Houston

Time: 10 am Boston, 3 pm London, 10 pm Beijing on 4 November 2021

tarkes's picture

Developments in Photoelasticity: A renaissance

Have you ever wondered that you can visually see the stress patterns live in a loaded structure! I am not speaking about the contours that you see in commercial finite element software #fea .

For e.g. see the colorful image attached. The fringe patterns are the live stress field around a crack in a loaded structure.

Find more answers on how to interpret these images using state of the art image processing technology in the newly published book:

Dr. Hanaor - Department of Ceramic Materials - TU Berlin's picture

Improved oxidation resistance of high emissivity coatings on fibrous ceramic for reusable space systems

Towards the development of reusable space systems, high emissivity coatings on fibrous ceramic substrates with improved thermal resistance are needed. In this study WSi2–MoSi2–Si–SiB6-borosilicate glass coatings were prepared on fibrous ZrO2 by slurry dipping and subsequent high temperature rapid sintering. A coating with 20 wt% WSi2 and 50 wt% MoSi2 presents optimal thermal stability with only 10.06 mg/cm2 mass loss and 4.0% emissivity decrease in the wavelength regime 1.27–1.73 μm after 50 h oxidation at 1773 K. The advantages of double phase metal-silicide coatings combining WSi2 and MoSi2 include improved thermal compatibility with the substrate and an enhanced glass-mediated self-healing ability.

rbatra's picture

Misuse of Eringen's non-local elasticity theory for functionally graded materials

Nearly 50 years ago, Eringen developed a nonlocal theory of elasic solids according to which the Causchy stress tensor "sigma" at a point x depends upon the strain tensor "epsilon" not only at the point x but also at all other points in the body.  For homogeneous solids, and a few additional assumptions, he showed that the constitutive relation can be reduced to a differential form that has become popular among people studying deformations of functionally graded materials (FGMs).  However, an FGM is inhomogeneous

matthew.grasinger's picture

Statistical mechanics of a dielectric polymer chain in the force ensemble

Dear colleagues,

We invite you to see the preprint of our new paper "Statistical mechanics of a dielectric polymer chain in the force ensemble" that will appear in Journal of the Mechanics and Physics of Solids. Here we compute the electroelasticity of single polymer chains using both analytical approximations and novel MCMC techniques. Working in the fixed force ensemble facilitates the derivation of the analytical approximations, which are shown to agree well with the MCMC results. This work complements prior work on the statistical mechanics of dielectric polymers chains obtained in a different ensemble. (

SwarnavaGhosh's picture

Machine-learned prediction of the electronic fields in deformed crystals

Dear Colleagues,

I am writing to share an article titled, "Machine-learned prediction of the electronic fields in a crystal", co-authored by Ying-Shi Teh, Professor Kaushik Bhattacharya and myself. The article is published in the journal Mechanics of Materials. Link to the article:                               

mohsenzaeem's picture

Modified embedded-atom method interatomic potentials for Al-Cu, Al-Fe and Al-Ni binary alloys: From room temperature to melting point

Second nearest neighbor modified embedded-atom method (2NN-MEAM) interatomic potentials are developed for binary aluminum (Al) alloys applicable from room temperature to the melting point. The binary alloys studied in this work are Al-Cu, Al-Fe and Al-Ni. Sensitivity and uncertainty analyses are performed on potential parameters based on the perturbation approach.

PINNs for solving multiphase poroelasticity relations

Link to the paper - PINN-Poroelasticity

If you are interested in physics informed neural networks (PINNs) and coupled single and multiphase flow in porous media, please check out our work below: 

- We find it challenging to solve coupled poroelasticity relations using PINNs (data-free).

Teng Li's picture

EML Webinar (Season 2) on 13 October 2021 by Alain Goriely on dynamics of active filaments

EML Webinar (Season 2) on 13 October 2021 will be given by Alain Goriely on dynamics of active filaments. Discussion leader:Krishna GarikipatiUniversity of Michigan

Time: 10 am Boston, 3 pm London, 10 pm Beijing on 13 October 2021


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