research
A multi-scale modeling framework for instabilities of film/substrate systems
Spatial pattern formation in stiff thin films on soft substrates is investigated from a multi-scale point of view based on a technique of slowly varying Fourier coefficients. A general macroscopic modeling framework is developed and then a simplified macroscopic model is derived. The model incorporates Asymptotic Numerical Method (ANM) as a robust path-following technique to trace the post-buckling evolution path and to predict secondary bifurcations.
Open-Access Paper: Transient thermal finite element analysis of CFC-Cu ITER monoblock using X-ray tomography data
This Creative Commons article in Fusion Engineering and Design investigates the thermal performance of a fusion power heat exchange component by analysing microstructures obtaiend using X-ray tomography. Simpleware software was used as part of an image-based modelling workflow that involved microstructurally faithful finite element analysis of how manufacturing defects affect performance.
Thanks to the Culham Centre for Fusion Energy, The University of Manchester, Politecnico di Torino, Simpleware and NETZSCH.
Postdoctoral position in Mechanical Engineering - Shape Memory Alloys
The following description is for a position is in my research group at Khalifa University in Abu Dhabi, United Arab Emirates.
Interface Crack Propagation in Abaqus, using Cohesive Interaction
Hi
I am trying to model interface crack propagation in Abaqus using Cohesive Interaction (default module in Abaqus). My model consists of two rectangular domains attached to each other by the longer edge. I am defining two surfaces on each of these domains and defining traction separation laws for these surfaces. There is a small portion in the middle for which I am not defining any traction separation law (thereby making it my notch). I am then applying displacement controlled loading on the remaining two longer edges. I am having two set of problems:
Bloch-Floquet waves in flexural systems with continuous and discrete elements
In this paper we describe the dynamic behavior of elongated multi-structured media excited by flexural harmonic waves. We examine periodic structures consisting of continuous beams and discrete resonators disposed in various arrangements. The transfer matrix approach and Bloch-Floquet conditions are implemented for the determination of diff erent propagation and non-propagation regimes.
Pure shear and uniaxial
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What is the difference between pure shea and uniaxial tension? How can we predict it experimentally?
Is my VUMAT subroutine right?
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Hi,
I has written a subroutine for the 'probabilistic damage model for the dynamic fragmentation in brittle materials,hild,advances in applied mechanics,2010'..The procedure I followed in UMAT subroutine is as follows:
On fracture in finite strain gradient plasticity
I hope some of you - particularly those working on strain gradient plasticity or damage and fracture modeling - find this work interesting.
On fracture in finite strain gradient plasticity
http://www.sciencedirect.com/science/article/pii/S074964191500162X
(A pre-print version is available at www.empaneda.com)
Material Engineering Using Concepts of Modularization in Integrated Circuit Design
With respect to material design, in particular, smart material design with specific functionalities, we may be able to learn something from our peers in electrical engineering. In integrated circuits (IC), we have up to one billion basic units such as capacitors, inductors, and resistors. However, we know exactly where they are and what they do. How does this happen?