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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)

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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?

buckling of channel section

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hi everyone,

 i am doing my dissertation on buckling of channel section. so i have used abaqus software to do the analysis. i did the modelling and applided unit load n given pinned-pinned end condition. and i have used constraints to both ends such that the load applied on the edge is concentrated at a point .

but the results i.e mode shapes are not coming properly even the eigen values are very less compaired to calculated buckling load.

plz help me out. 

dimensions of specimen channel section

width of web 100mm

width of flange 50mm

Compression buckling of polymeric beam/column

Hello,

I have a problem with a stacked colum of elastomeric membranes (natural rubber or silicone).

I am looking for a compression buckling criterion that applies for hyperelastic materials in presence of large deformations (up to 400%).

I've read about Haringx formula, that should apply for these materials, but I suspect that it is valid for small strains only.

My question is:

- is there a suitable buckling criterion for this case?

Modeling a curved graphene sheet

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HI,

I'm trying to simlate the buckling behavior of a grpahene sheet using ANSYS APDL 14.5

In my analysis I need to have a graphene sheet that is curved with a variable radius for different cases. I was wondering if there is a faster way to model the graphene sheet assuming that the carbon-carbon bonds are modelled as elastic beam elements( beam 188) and the nodes are represnted by the carbon atoms.

 

 --Naveen R--

Buckling and Post buckling of Plates

Hello every one.

I'm doing work on buckling  analysis using abaqus. I want to continue my work on postbuckling of plates also. I'm not getting any tutorials on how to perform Postbuckling analysis of plates using abaqus. When i searched the abaqus help documentation, i got .inp file of a plate, but i didnt get the steps on how to perform the analysis. 

I read in some books that after buckling of a plate, it still can take the load. How to do this in abaqus interface ?how to perform the postbuckling analysis in a proper way ?

Plz help

Global buckling in a 3D beam ABAQUS

Hello everyone, 

I want to reproduce global buckling of a 3D column (simply supported) using shell elements independently of its length. 
I know that each section of the column should behave like a rigid body but I can't do it, so by doing the buckling analysis I get other buckling modes (like local buckling). 
My initial idea was to use rigid body (tie) constraint in some sections (uniformly spaced) but what I got was some local buckling in the extremities of the column. 

Bathe's subspace iteration, how to find the largest eigenvalue/mode?

Does anyone know how to modify Bathe's subspace iteration eigensolver to compute the highest eigenvalue instead of the smallest ?

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