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Constraint on a beam bottom surface not on the neutral axis

Submitted by Yuchi Kang on

Hi!

I have a question regarding the beam deflection. As shown in the pic, the roller constraint is applied on the bottom of the beam(Beam A) rather than neutral axis(Beam B). Could anybody help to provide some information about Beam A hand calculation?

Thanks!

https://files.fm/u/54jwqnru#sign_up

subroutine interface to visit nodal displacements in Abaqus

Submitted by Oskar Xavier on

I wonder if there is any subroutine interface to have access to nodal ( not integral point ) displacement in abaqus DURING the analysis phase.  Suppose I have a field that is going to be used in UMAT and that is dependent on  displacements of all nodes (presumably stored in an array) from the last increment. Is this possible to be implemented within Abaqus?

Thank you all !

Symplectic Analysis of Wrinkles in Elastic Layers with Graded Stiffnesses

Submitted by Teng zhang on

Wrinkles in layered neo-Hookean structures were recently formulated as a Hamiltonian system by taking the thickness direction as a pseudo-time variable. This enabled an efficient and accurate numerical method to solve the eigenvalue problem for onset wrinkles. Here, we show that wrinkles in graded elastic layers can also be described as a time-varying Hamiltonian system. The connection between wrinkles and the Hamiltonian system is established through an energy method.

Elaborating the controversy on the contribution of the surface stress in silicon nanowires

Submitted by MNasr on

A link between the local surface stress at the atomic scale to the overall behavior of the continuum system indicates a twist deformation at the free end of silicon nano-cantilever. The importance of size and crystal orientation is demonstrated (for more details of the project see:https://www.researchgate.net/publication/327768951_Surface_Stress_Effec…).

Nanoindentation and nanoscratching at finite temperatures: Three reviews

Submitted by Shuozhi Xu on

Dear Colleague,

Dr. Saeed Zare Chavoshi and I have co-authored three review articles, concerning nanoindentation and nanoscratching at finite temperatures from the computational and experimental perspectives:

On mixed-mode fracture mechanics models for contact area reduction under shear load in soft materials

Submitted by Antonio Papangelo on

The fundamental problem of friction in the presence of macroscopic adhesion, as in soft bodies, is receiving interest from many experimentalists. Since the first fracture mechanics 'purely brittle' model of Savkoor and Briggs, models have been proposed where the mixed mode toughness is interpreted with phenomenological fitting coefficients introducing weaker coupling between modes than expected by the "purely brittle" model.