User login

You are here


gaurp's picture

Characterization of Human Diaphragm at high strain rate loading.

In this paper, we studied the strain rate dependent failure properties of human diaphragm tissue using uniaxial tensile testing at four strain rates, i.e. 0.0015/s, 65/s, 130/s and 190/s. The custom made quasi-satatic and drop tower based dynamic test setups was used to conduct the tests uptill 200/s strain rate.

Ali Ramazani's picture

Modeling the Hydrophobicity of Nanoparticles and Their Interaction with Lipids and Proteins

We present a method of modeling nanoparticle (NP) hydrophobicity using coarse-grained molecular dynamics (CG MD) simulations, and apply this to the interaction of lipids with nanoparticles. To model at a coarse-grained level the wettability or hydrophobicity of a given material, we choose the MARTINI coarse-grained force field, and determine through simulation the contact angles of MARTINI water droplets residing on flat regular surfaces composed of various MARTINI bead types (C1, C2, etc.).

What kind of tensile testing grips is right for your samples and application?

Choosing the most appropriate tensile grips to effectively secure your samples is critical in getting accurate measurements of tensile properties such as tensile strength, peak load, elongation, tensile modulus, and yield.

Xiangbiao Liao's picture

Recent work "Self-Assembly of Islands on Spherical Substrates by Surface Instability"

Through strain-induced morphological instability, protruding patterns of roughly commensurate nanostructures are self-assembled on the surface of spherical core/shell systems. A three-dimensional (3D) phase field model is established for a closed substrate. We investigate both numerically and analytically the kinetics of the morphological evolution, from grooves to separated islands, which are sensitive to substrate curvature, misfit strain, and modulus ratio between the core and shell.

Bin Liu's picture

The surface-forming energy release rate versus the local energy release rate

In our just published paper, we identify two ways to extract the energy (or power) flowing into a crack tip during propagation based on the power balance of areas enclosed by a stationary contour and a comoving contour. It is very interesting to find a contradiction that two corresponding energy release rates (ERRs), a surface-forming ERR and a local ERR, are different when stress singularity exists at a crack tip. Besides a rigorous mathematical interpretation, we deduce that the stress singularity leads to an accompanying kinetic energy at the crack tip.

Meisam. Asgari's picture

In vitro fibrillogenesis of tropocollagen type III in collagen type I affects its relative fibrillar topology and mechanics

Tropocollagen types I and III were simultaneously fibrilized in vitro, and the differences between the geometric and mechanical properties of the heterotypic fibrils with different mixing ratios of tropocollagen III to I were investigated. Transmission electron microscopy was used to confirm the simultaneous presence of both tropocollagen types within the heterotypic fibrils. The incorporation of collagen III in I caused the fibrils to be thinner with a shorter D-banding than pure collagen I.

How to measure hydroxyl radical concentration (airborne)?

Dear engineers and scientists,


Measuring and artificially producing hydroxyl radicals is relatively new research with great challenges due to short half life. I have asked this question on many forums to gather as much information as I can and my question is:


How can we measure hydroxyl radical concentration? I am only interested in airborne concentration, hydroxyls in water and cells are not relevant to my research.


Also there are few articles mentioned every time in these type of discussions and they are:

Tear strength, porosity, hole size

Choose a channel featured in the header of iMechanica: 

Have any one here worked on the effect of porosity and holes size on the mechanical properties, inclduing tear stregth of a film? I have a porous polyethylene film and I need to know what is the effect of holes size on the non-linear properties, such as tear strength, for a fixed porosuty of 40%. The filmthickness is about 10-20um. The hole size varies from 100 nm to 1 um to 10 um to 100um and higher.



Rouzbeh1's picture

Post-Doctoral Associate/Research Scientist Position in Advanced Materials at Rice University


Position Description: 

A postdoctoral associate/research scientist position in the area of advanced synthesis and characterization of materials and nanocomposites is available at Rice University. The successful candidates will work in a highly inter-disciplinary and stimulating environment.


Job Duties and Responsibilities: 

Building a Digital Wind Farm

We've recently published an extensive review of the state-of-the-art in modelling and simulation for wind energy. The paper is open access for a limited time and can be found online at the link below.

Hewitt, S; Margetts L and Revell A, "Building a digital wind farm", Archives in Computational Methods in Engineering, 2017.

Frank Richter's picture

reflection and transmission coefficients in long elastic bars


Dear iMechanica Community,

I'd like to ask for advice on modelling reflection and transmission coefficients when two bars with different cross-sectional areas contact each other and are exposed to pulse loading.

I have modelled this process in Abaqus/Explicit as a two-dimensional simulation. The investigation was conveniently done as a parametric study, defining the lateral dimension as parameter. Both bars are slim (length 2 m, diameter 2 cm) and elastic.

Pedro Reis's picture

Postdoc positions in the new group of Pedro Reis at EPFL, Lausanne, Switzerland

I have openings for two post-doc positions in my new research group at the Institute of Mechanical Engineering at the Ecole Polytechnique Fédérale de Lausanne (EPFL) in Lausanne, Switzerland, where I will be moving later this year. The target start date is January 1st, 2018.

nicfang's picture

Computational inverse design of non-intuitive illumination patterns to maximize optical force or torque

This paper aims to maximize optical force or torque on arbitrary micro- and nanoscale objects using numerically optimized structured illumination. By developing a numerical framework for computer-automated design of 3d vector-field illumination, we demonstrate a 20-fold enhancement in optical torque per intensity over circularly polarized plane wave on a model plasmonic particle.

Mengdie Hu's picture

Micromachines (ISSN 2072-666X, Impact Factor: 1.295) Open Access Journal - Published by MDPI

Dear All,

Micromachines (ISSN 2072-666X) is an open access journal on the technology and science of micro-scale machines and micromachinery, published monthly online by MDPI.

Mengdie Hu's picture

Fluids (ISSN 2311-5521) Open Access Journal - Published by MDPI

Fluids  (ISSN 2311-5521) is an international, open access journal on all aspects of fluids, especially fluid mechanics. It is published quarterly online by MDPI. Fluids provides an advanced forum for studies on fluid dynamic theory and its applications, and fluid simulation, modeling and experimentation in chemical, physical and biological processes. Our aim is to publish state-of-the-art papers, including original research papers, reviews, case reports, as well as technical notes and meeting reports.

oliver oreilly's picture

The Shoelace Catastrophe

Readers of this site might be interested in the following paper appeared in the Proceedings of the Royal Society and has received considerable attention in the media:

The roles of impact and inertia in the failure of a shoelace knot

The paper discusses a mechanism for the the accidental untying of a shoelace knot that many of us, including me, experience on a daily basis. The failure is sudden and catastropic as can be seen in the following video:

Flavio Stochino's picture

International Journal of Structural Glass and Advanced Materials Research (IJSGAMR)

Dear all,

the International Journal of Structural Glass and Advanced Materials Research (IJSGAMR) is a peer-reviewed, open access journal which covers all aspects of theoretical and practical research of materials science.


Arash_Yavari's picture

Nonlinear Elastic Inclusions in Anisotropic Solids

In this paper we study the stress and deformation fields generated by nonlinear inclusions with finite eigenstrains in anisotropic solids. In particular, we consider finite eigenstrains in transversely isotropic spherical balls and orthotropic cylindrical bars made of both compressible and incompressible solids. We show that the stress field in a spherical inclusion with uniform pure dilatational eigenstrain in a spherical ball made of an incompressible transversely isotropic solid such that the material preferred direction is radial at any point is uniform and hydrostatic.


Is it possible to simulate air flow over objects of unconventional geometries (curved solids) using Abaqus?

Teng Li's picture

Call for nomination of Extreme Mechanics Letters Young Investigator Award 2017

The third Extreme Mechanics Letters (EML) Young Investigator Award is provided by Elsevier to honor the best paper by a young scientist which has been published in volumes 9-12 EML from 2016 to 2017.



Subscribe to RSS - research

Recent comments

More comments


Subscribe to Syndicate