It seems that the measurment of local stress and strain in fatigue crack tip will be difficult. some researcher use F.E analysis method,in contrary using of numerical solution. however analytical method also has investigated. what method you can imagine? i need a brain storm in this issue.
Thank you
Hadi
Dear Colleagues,
May I have your attention please? It's air time for the second episode of "Popular Science's Future of...Combat". The show will air on The Science Channel (science.discovery.com) at 9pm ET/PT on 9/07/09. The research on biological armors by Christine Ortiz's group from MIT will be reported.
Enjoy.
What is the difference between Eulerian and Lagrangian coordinates?
I have read that, Eulerian coordinates correspond to spatial points and Lagrangian correspond to material points.
A material point corresponds to a spatial coordinate in initial configuration?
I'm , however, not able to get the diference between the two.Can anyone explain?
In conventional linear finite element analysis, what do we use?Lagrangian or Eulerian mesh?
We perform uniaxial tensile tests on polyimide-supported copper films with a strong (111) fiber texture and with thicknesses varying from 50 nm to 1 μm. Films with thicknesses below 200 nm fail by intergranular fracture at elongations of only a few percent. Thicker films rupture by ductile transgranular fracture and local debonding from the substrate. The failure strain for transgranular fracture exhibits a maximum for film thicknesses around 500 nm.
Closed!!!
Two positions for guest researchers(post-doc) at NIST on biomechanics
Email: martin.chiang [at] nist.gov (martin[dot]chiang[at]nist[dot]gov)
Homepage: http://www.nist.gov/msel/polymers/biomaterials/martin_chiang.cfm
Research area: Biomechanics
I have had some time to write down an informal introduction to Moving Least Squares, from my coding perspective. It is supposed to be a condensation of experiences after some years of using it, although it does not contain any new theoretical aspect.
Dear everyone
If we considerer a 3D fracture stress and strain field as a combination of numerous 2D fields in thickness direction, the J integral at each 2D plane can be obtained according to Rice’s definition (Abaqus and Ansys also include this function). What I concerned is the ratio of J integral at the surface of SEB or CT specimen to that at the mid-plane of the specimen. What factors have influence on the ratio? How to find the quantitive relationship between the factors and the ratio in linear elastic model?
I have a question which dealing with head loss in laminar flow.
Is there another head loss formula except the Δh = f (l / dh) (v2 / g 2).
which the formula association of viscosity, length, wall shear stress, and diameter.
Any1 here can list out the head loss formula for me??
Thanks for the concern!
Worth reading
http://www.dpmms.cam.ac.uk/~wtg10/continuity.html
in case you need to explain the epsilon-delta definition of continuity to an engineering student.
-- Biswajit
The Department of Mechanical Engineering at the Universitat Rovira i Virgili (URV) (www.urv.cat) in Tarragona (Spain), is looking for several enthusiastic research students with a strong interest in fluid dynamics. Successful candidates will join a small but very active multidisciplinary team, working in fluid-structure interaction problems. The research will be mainly experimental and focused in the area of fluid structure interaction with application to several engineering problems.
