# research

## micromechanics of composite materials

This blog focuses on the micromechanics modeling of composite materials.

## ELASTOMERS

Elastomers, or rubber like materials, have many engineering applications due to their wide availability and low cost. They are also used because of their excellent damping and energy absorption characteristics, flexibility, resiliency, long service life, ability to seal against moisture, heat, and pressure, and non-toxic. It can be easily molded into almost any shape. Applications of elastomers include solid propellant, biomechanics and medical/dental, tires, gaskets, and engine mounts.

## Finite Element Method for Rubber or Rubber-Like Materials

Hello, I need help for using finite element method in modelling rubber or rubber-like materials?

## viscoelasticity

This blog focuses on viscoelasticity (http://en.wikipedia.org/wiki/Viscoelasticity)

## Does anyone know where I can find the stress field of a perforated strip?

I am trying to get the shrinkage rate of a void in a finite grain which is simplified as a rectangular region within a circular hole. So I need to find out the stress field to get the chemical potentials.

## EFG with Lagrange Multipliers for elastodynamic problems

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hi ,

by using EFG with Lagrange multipliers for elastodynamics we will get below two equations .

M (U double dot)+C (U dot) + KU = F   (ofcourse C=0 in my problem)

HU=q    (q is not equal to zero) (where  H= G Transpose)

## Granular mechanics

Granular materials deserve being investigated as this has been the case with liquids, gases and elastic materials.

## Titanium and nickel Functionally graded materials

Hi,

i would be working of development of titanium and nickel functionally graded materials by laser deposition. I would appreciate any suggestions and know-how about this specific topic.

Kamran.

## What are the basic difficulties of using the collocation techniques for solving PDE’s?

Hello, Can anybody inform me what are the basic difficulties of using point collocation (strong form) kind of method for solving pde's when compared with solving its weak statement? I have listed a few, known to me,

## Non Destructive Evaluation of a Ceramic Matrix Composite

Background of Study

• Non destructive evaluation (NDE) application
• Based on industrial CT scan
• Visualisation and segmentation of internal anomalies

## FE mesh of particulate-reinforced metal matrix composite

Background of Study

• Based on X-ray tomography (XMT)
• Multi-part FEA model
• Scan to mesh in 10 minutes

Aluminum-based particulate-reinforced metal matrix composites (PMMCs) frequently have a heterogeneous distribution of reinforcement particles whether produced by a powder or liquid processing route. The applicability of X-ray microtomography (XMT) for the characterization of this heterogeneity and its influence on final properties was investigated, for the case of a powder blended and extruded AA2124 matrix with Ni particulate. Simpleware software was used to quantify the embedded Ni particle size distribution and the extent and texture of clusters formed.

## Analysis of a golf ball hitting the eye

Purpose of the Study
Computer models of the human eye were constructed for the purposes of studying interactions with foreign bodies.

• Based on in vivo patient data
• Multi-part model
• Mixed volumetric and surface meshes
• Automated generation of contact surfaces

Scan and Segmentation in ScanIP
High resolution in vivo MRI scans of a 29 year old Caucasian female was obtained using both a surface and a head coil on a Philips Gyroscan 1.5 Tesla imager. The following structures were segmented from the 3D data set by a Physician: the globe and optic nerve, the bony orbit, the eyelids and facial soft tissues, the extra-ocular muscles.

Mesh Generation in +ScanFE
A number of finite element models were generated based on the segmented image data. Each structure was meshed with mixed hexahedral and tetrahedral elements. The contact surfaces are particularly robust as the master and slave contact faces are paired - contact structures were exported as volumetric meshes and as surface meshes as required. For this application, the bony orbit was modelled as a rigid structure defined by surface shell elements rather than as a volumetric mesh thereby providing some computational saving.

FE Analysis in LS-DYNA
An analysis of a golf ball hitting the eye was carried out to demonstrate the robustness of the model for simulation purposes, as well as to demonstrate the remarkable sophistication of biological models which can now be generated based on in vivo data. This case study was developed in collaboration with Naomi Green at ARUP, Solihull, UK.