By: Payam Soltani, A Kassaei, M M Taherian and A Farshidianfar
The fatigue behavior of Ag films on polyethyleneterephthalate substrates was studied using electrical resistance measurements.
Scanning electron microscopy images showed two types of failure: typical fatigue failure with extrusion–intrusion pairs, and ductile
failure with local necking. Once through-thickness cracks are formed in the metal layer, cracks propagate and the resistance increases abruptly for both failure modes. The effect of adhesion on fatigue life is discussed in terms of concurrent delamination, crack initiation and propagation.
In this paper, we report that silver films evaporated on poly-ethylene-terephthalate (PET) substrates coated with an acrylic primer can be stretched beyond 70% without fracture. As-deposited films show a larger failure strain than annealed coatings. These observations are rationalized in light of a ductile fracture mechanism where debonding from the substrate coevolves with strain localization. The results of this study indicate that PET substrates coated with an acrylic primer layer may be suitable for stretchable electronics.
Hi Everyone,
I have a modeling problem. It finally goes to drug flows inside a tute of one dimension. The speed of the drug flow is constant. The initial condition is know. The tube is closed, which means no exterior drug flows into the tube and the drug can not flow outside of the tube. Does anyone know how to set up the boundary conditions in mathematical formula? Thanks a lot.
One PhD student position is available at Monash University, Sunway Campus in Malaysia with the leadership of Prof A.K Soh.
We expect students with the knowledge and experience in at least two or more of the following skills:
1. nano-/micro-mechanics.
2. computational mechanics.
3. fabrication and characterization of advanced materials, e.g.nano-thin-films, nano-wire arrays, functional materials, etc.
4. strong physics/chemistry knowledge, e.g., quantum mechanics.
Hi,
Is principle of Virtual displacements employed to derive equations of motion for a laminted plate?
Is this useful for the non-linear analysis of plate through Classical plate theories ?
Would you please give me some suggestions?
Thanks in advance
Hello!
I have to model the RVE for steel fiber reinforced concrete using abaqus. I have to validate it for compressive behaviour and drop weight impact analysis. I am new to abaqus and i have no idea how to do it. Can someone please help me do it? I am in serious need of some sort of guidance.
A recording from the Microfluidics Workshop at NNIN/C, University of Michigan.
http://www.youtube.com/watch?v=gygcx-beYrY
Slides from the presentation can be downloaded from the webpage below
http://lnf.umich.edu/nnin-at-michigan/index.php/computation/workshops-t…
We have a graduate research assistant position to be filled as
soon as possible. Please contact Dr. Kidane if you are looking for a PhD
position in the area of dynamic behavior of materials. Applicant should have a
master degree in the area of mechanical engineering, material science or
related subject.
Email: kidanea [at] cec.sc.edu (kidanea[at]cec[dot]sc[dot]edu)
Department of Mechanical Engineering
, University of South Carolina
