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Francesco Dal Corso's picture

Mini-Symposium on "Mechanics and Physics of Structures" at ESMC2022 Galway, 4-8 July 2022 (Abstract submission deadline: November 19th, 2021)

We would like to invite you to participate in the Mini-Symposium on "Mechanics and Physics of Structures" within "ESMC2022 - 11th European Solid Mechanics Conference" in Galway (Ireland), July 4-8, 2022.

 

The deadline for abstract submission is November 19th, 2021.

 

Mini-symposium Organizers
Sebastien Neukirch (CNRS/UPMC),
Benoit Roman (CNRS/UPMC),
Keith Seffen (University of Cambridge),
Francesco Dal Corso (University of Trento)

Fan Xu's picture

Buckling of an elastic layer based on implicit constitution: Incremental theory and numerical framework

A general class of implicit bodies was proposed to describe elastic response of solids, which contains the Cauchy–Green tensor as a function of Cauchy stress. Here, we consider the buckling of solids described by such a subclass of implicit constitutive relation. We present a general linear incremental theory and carry out bifurcation analysis of a uniaxially compressed rectangular layer described by an implicit constitution.

Ajeet Kumar's picture

A magnetoelastic theory for Kirchhoff rods having uniformly distributed paramagnetic inclusions and its buckling

We present a theory for finite and spatial elastic deformation of rods under the influence of arbitrary magnetic field and boundary condition. The rod is modeled as a Kirchhoff rod and is assumed to have uniformly distributed array of uniaxial spheroidal paramagnetic inclusions embedded in it all pointing in the same direction in the undeformed state. The governing equations of the magnetoelastic rod are derived which are further non-dimensionalized and linearized to investigate buckling in such rods.

M. Shaat's picture

On postbuckling mode distortion and inversion of nanostructures due to surface roughness

In this paper, we investigate the surface roughness-dependence of buckling of beam-nanostructures. A new variational formulation of buckling of Euler-Bernoulli rough beams is developed based on the Hamil- ton’s principle. The equation of motion of the beam is obtained with a coupling term that depends on the beam surface roughness. Exact solutions are derived for the buckling configurations and the pre-buckling and postbuckling vibrations of simply supported structures.

CMiculas's picture

How to import edited node coordinates (mesh) to Abaqus?

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import modified nodes coordinates to abaqus

yann.charles's picture

1 years PostDoctoral Position - Universities Paris 13 & Paris 7 , Paris, France

A 1 year post Doctoral position is avalaible in France, on computational fractur mechanics. This is a join project between Univ. Paris 13 (LSPM lab), and Paris 7 (ITODYS lab).

The present postdoc subject is focused on the modeling cracking and buckling in thin films and nanostructures on stretchable substrate.

Francesco Dal Corso's picture

Mini-Symposium on "Mechanics and Physics of Solids and Structures" within ESMC2018, Bologna (Italy), July 2-6, 2018 (Abstract submission deadline: November 15th, 2017)

We would like to invite you to participate in the Mini-Symposium on "Mechanics and Physics of Solids and Structures" within "ESMC2018 - 10th European Solid Mechanics Conference" in Bologna (Italy), July 2-6, 2018.

The deadline for abstract submission is November 15th, 2017.

Mini-symposium Organizers
Sebastien Neukirch (CNRS/UPMC),
Benoit Roman (CNRS/UPMC),
Keith Seffen (University of Cambridge),
Francesco Dal Corso (University of Trento)

Douglas P Holmes's picture

Curvature-driven morphing of non-Euclidean shells

Matteo Pezzulla, Norbert Stoop, Xin Jiang, Douglas P. Holmes, Proceedings of the Royal Society A, 473(2201), (2017).

Davide Bigoni's picture

Elastica compass, catapult and soft robot arm

When an elastic rod with a rotating clamp behaves as a deformable compass or as a deformable catapult?

This behaviour depends on the load applied at the free end!!

Enjoy the elastica compass and the elastica catapult at http://www.ing.unitn.it/~bigoni/catapult.html

Design of Storage Tank( including Cone roof structure analysis)

Choose a channel featured in the header of iMechanica: 

Namaste from India.Jay Naik here. I am Post graduation Student doing Specialization in Machine Design.I am Doing My project in Master in area of" Design of storage tank" in One of the reputed company in Static Equipment Design.Any Idea on which Software(Fea or failure analysis) Design of storage tank is carried out?I have heard about AMETank and Ansys.

Secondly i am carrying out Literature review Present days.reading API 650 and other standards.Suggestion requires in this area.

Please guide me in proper manner.in which way i should carry out the project in systematic way.

Ajeet Kumar's picture

Effect of material nonlinearity on spatial buckling of nanorods and nanotubes

You may be interested in reading our following article: http://link.springer.com/article/10.1007/s10659-016-9586-1. We show the importance of incorporating material nonlinearity for accurate simulation of nanorods and nanotubes. The linear material laws are shown to give completely erroneous results. The nonlinear material laws for nanorods were obtained using the recently proposed "Helical Cauchy-Born rule". We also discuss how surface stress affects buckling in such nanostructures.

Is it possible to solve buckling in Abaqus with only residual stress defined as predefined load?

Hi Sirs,

As title, I wondering if the problem can be solved with only material residual stress but no other external load applied?

After several trials, Abaqus returns message
"MASS OR DIFFERENTIAL STIFFNESS MATRIX IS COMPLETELY NULL. THE EIGENPROBLEM CANNOT BE SOLVED. IN A *BUCKLE ANALYSIS THE MOST LIKELY CAUSE IS THAT A NONZERO LOADING PATTERN WAS NOT SPECIFIED VIA *BOUNDARY, *CLOAD, *DLOAD, ETC,. SEE Eigenvalue Buckling Prediction IN THE ABAQUS/STANDARD USERS MANUAL"

Douglas P Holmes's picture

Geometry and mechanics of thin growing bilayers

Matteo Pezzulla, Gabriel P. Smith, Paola Nardinocchi, and Douglas P. Holmes, Soft Matter, 12, 4435-4442, (2016).

 

Davide Bigoni's picture

The injection of an elastic rod

What should be expected when an elastic rod is forced to slip inside a sliding sleeve and against an obstacle?

After buckling, configurational forces play a strong role, so that a force reversal is observed!

Enjoy the injection of an elastic rod at http://www.ing.unitn.it/~bigoni/injection.html

Do you know how to model fork support?

Do you think this is correctly modeled as fork support (picture)

minor axis bending- restrained, torsion - restrained , free to warp

 

 

Lateral torsional buckling of I beams with restraint

I am looking to model buckling of I steel beams with restraint in abaqus. But I do not know how to make rigid connections between the steel members. 

 

Why is the other beam( beam with fixed supports) not stressed? How do i define contact between the two beams.

Hamid Torabi's picture

Micromechanics of collective buckling in CNT turfs

Complex structures consisting of intertwined, nominally vertical carbon nanotubes (CNTs) are called turfs. Under uniform compression experiments, CNT turfs exhibit irreversible collective buckling of a layer preceded by reorientation of CNT segments. Experimentally observed independence of the buckling stress and the buckling wavelength on the turf width suggests the existence of an intrinsic material length.

Imperfection in a Riks Analysis (ABAQUS)

I am performing a nonlinear post buckling using Riks method. I went through different tutorials for the same. I happen to see that an *IMPERFECTION is introduced while performing the non linear buckling analysis.Why is it done? How does/will the model react differently if the Imperfection is no introduced?

I wish to plot the graph of load v/s displacement for 1,2,3,4...10 times the critical buckling load during the post buckling analysis (Riks method). How do I do that?

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