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Mechanics connection to memory

Mechanical tension contributes to clustering of neurotransmitter vesicles at presynaptic terminals. 

Scott SiechenShengyuan YangAkira Chiba and Taher Saif

vikas sharma's picture

Damage Investigation In Drilling of Polymer Matrix Composites

hii friends

              I am doing project on damage investigation  in drilling of polymer matrix composite and using FEM approach ABAQUS 6.8. so i want to damage compare between trepanning tool & twist drill. i have problem in simulation and  plotting(graph). so plz solved this problem

Question in sequentially coupled thermal stress analysis using ABAQUS

I was wondering if anyone has solved a “sequentially coupled thermal stress analysis” problem using ABAQUS?

If so, here is what I am looking to solve.

Let’s assume we solved for the temperature (T) as a function of time and space using the transient heat transfer analysis given certain BCs.

Clarifications o Stroh formalism


I am solving some problomes for Stresses around holes for Anisotropic cases. In this connection most of authors have solved the stresses in cartesian co-ordinates only. Can I have any papers which are solved in polar co-ordinates by Stroh formalism for Stresses around holes in Composite laminates.So kindly help me

thanking you

 M.Ramesh Babu 

how to start a research

hi all,

 I am a mechanical engineer currently pursuing Master degree (Post graduation). Ultimately i also want to pursue a research leading to PhD after my master's. Its my burning desire to do some significant research in the field of Fatigue analysis using Fracture mechanics approach preferably for aerospace domain using advanced CAE softwares like Nasgrow, Afgrow, Abaqus, FE-safe, MSC Fatigue, etc,..

zishun liu's picture

International Journal of Applied Mechanics (IJAM) Vol.1 No.4

Forthcoming papers of International Journal of Applied Mechanics (IJAM) Vol.1 No.4 

1. “Strain Deconcentration In Thin Films Patterned With Circular Holes”, Matthew B. Tucker and Teng Li, (University of Maryland, USA). 

I'm looking for a new vibration exciter

I'm looking for a new vibration exciter which exciting frequency can reach 300hz .I'll use it to load the cantilever beam specimen , compare the  fatigue life of the specimen under different loading frequency. the electric exciter can not  generate the same amplitude under difference exciting frequency.

who can tell me that how can I found or design a mechine to finish the expriment.thank you

vh's picture

Compositional patterning in coherent and dislocated alloy nanocrystals

Variations in the distribution of the alloy components can significantly influence the electronic properties

of self-organized alloy nanocrystals. Using a combination of finite element and quadratic programming

optimization methods, we have developed an efficient numerical technique to compute the equilibrium

composition profiles in coherent and dislocated nanocrystals. We show that the variations in composition

profiles arise due to the competition between chemical mixing effects and the relaxation of composition-

dependent mismatch strain as well as strain due to dislocations. We find that the composition profiles

BoJing Zhu's picture

Comparison of intrapore velocities measured and simulated in the highly macro-porous biscayne aquifer

Using the data from 3D hybrid lattice boltzmann code under parallel environments, some interesting simulated results are obtained by using Tecplot.


After download the attached files, please change files name from *.ppt to *.wmv, then they  can be display normally by media player  

Li Han's picture

Water diffusion and fracture behavior in nano-porous low-k dielectric film stacks

Among various low-dielectric constant low-k materials under development, organosilicate glassesOSGs containing nanometer-size pores are leading candidates for use as intrametal dielectrics infuture microelectronics technologies. In this paper, we investigate the direct impact of waterdiffusion on the fracture behavior of film stacks that contain porous OSG coatings.

kaushik das's picture

Symmetry breaking, snap-through, and pull-in instabilities under dynamic loading of microelectromechanical shallow arches

Arch-shaped microelectromechanical systems (MEMS) have been used as mechanical memories, micro-relays, micro-valves, optical switches, and digital micro-mirrors. A bi-stable structure, such as an arch, is characterized by a multivalued load deflection curve.

Light Activated Polymers

Soft active materials have received increasing interests recently. Here, soft materials can broadly refer to polymers, elastomers, hydrogel gels. Active materials mean that these materials can respond to external stimuli. Examples of soft active materials include shape memory polymers, environmentally responsive hydrogels, liquid crystal elastomers, etc.

Rui Huang's picture

Effect of constraint on swelling of hydrogels and formation of surface creases

Inspired by recent works by Wei Hong , Xuanhe Zhao, Zhigang Suo, and their coworkers, we started a project on hydrogels, with particular interest in various instability patterns observed in experiments. The attachment is our first manuscript on this subject. Through this work we hope to achieve the following:

Combined EAM and Stillinger-Weber potential and Combined EAM and Tersoff Potential

We have combined the EAM and the SW and the TF potentials in one
functional form. This functional form allows the modeling of metals, covalent systems, and mixed systems (M-Si,Ge,C,SiC) very efficiently allowing the study of
large systems. The combined potential retains the properties of the original EAM, SW and TF potentials for the pure elements thus limiting the fitting only for the cross interactions. The potential iscalled as the "Angular-dependent
Embedded Atom Method".

Taxonomy upgrade extras: 

Failure Criteria for Fiber Analysis


I am trying to include a failure criteria for a single yarn in a plain- weave fabric model.The yarns behave as elastic-brittle( That is there is no plastic deformation)
I have the failure stresses and strains data in both fiber and transverse directions.I have  included the following properties:

Material definition
Elastic : engineering constants
Viscoelastic: Relaxation test data

Analysis of Torsion-Bending of Laminated Composite Beam by FEM using ANSYS

 Hi everyone!

i'm a researcher at the Deparment of Mechanical Engineering of University of the Philippines-Diliman. currently, i'm working on completing my thesis for my MS degree. my research area in general is in mechanics of composite materials (fiber-reinforced). my problem is that of formulating the FEM solution to the torsion-bending of laminated composite beam having orthotropic layers.

Deformation gradients and atomistic simulations

I came upon a recent paper called "Deformation gradients for continuum mechanical analysis of atomistic simulations" by Jonathan A. Zimmerman , Douglas J. Bammann,  and Huajian Gao, International Journal of Solids and Structures 46 (2009) 238–253 where the authors conclude with

User Element for Ansys


I ask for help. I need to implement a user element for shell element in Ansys, and I ask if somebody know how to do this or can send me some example. I try to read something but I not found a good example about user element in Ansys Thanks a lot.

Simple beam simulation in Abaqus

Hi everyone,

I have modelled a simple beam using continuum elements to assess the mechanical behaviour. The results are quite good since it could predict deflection close to test data. Using ABAQUS general-purpose shell elements, the deflection is quite small compared to test results ie it appears the material has become more stiff. Can any one give me a clue?

Many thanks in advance,



Combined EAM and Stillinger-Weber potential and Combined EAM and Tersoff Potential

We have combined the EAM and the SW and the TF potentials in one functional form. This functional form allows the modeling of metal covalent systems (M-Si,Ge,C,SiC) very efficiently allowing the study of large systems. The potential iscalled as the "Angular-dependent Embedded Atom Method".



Tensile coupon test - simulation of tensile coupons (after necking)

I have carried out several coupon tests (rectangular coupons similar to
those of ASTM E8). Some of these tests have kind of weird behavior. The
problem arises when I simulate results with ABAQUS. It goes pretty well
until a few steps after necking. Test and ABAQUS results match exactly
until several steps before fracture. After this point, there is a
discrepancy between results and my attempts in capturing the observed
behavior was unsuccessful. (around 10% or more plastic strain).


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