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Cyclic thermal load

Submitted by Jessi on
research
ansys

I need to apply cyclic thermal load on a layered structure and want to see the stress generated and structural displacement using Ansys. How can I apply cyclic thermal load? iI tried to use Load Step Opts. Since I am interested only in stress-displacemnt, I used structural element. But if i use structural element, it doesn't give me Time/frequency option under load Step. Do i need to use coupled element? Is there any other way to apply cyclic thermal load to see stress-displacement? Thanks!

 

Strain vs displacement

Submitted by Anonymous (not verified) on
education

Hi,

in a clamped bar at one end submitted to tension at the other end, the deformation, as well as stress, is constant while the displacement is linear.So, at the clamped end displacement is null wheras deformation is constant! could anyone explain me this paradoxe?

Thanks a lot. 

Modeling anisotropy with abaqus

Submitted by Ali Khajehgani on

Hello,

Is there anyone out there that can suggest a suitable subroutine in abaqus for modeling anisotropy. I know about the potential option in abaqus CAE that uses hill`s criteria to define different yield ratios in different directions but the aluminum alloy i`m working with is almost isotrop at yield limit but strongly anisotrop at ultimate tensile stress and in plastic strain . So i need to use a subroutine that takes all these properties into considration.

I appreciate any help

 Best Regards

 Ali Khajehgani

about critical thickness theory

Submitted by dabiao liu on
research
strain gradient plasticity
critical thickness theory

who  can tell me more about the critical thickness theory ?I will be very excited if you   can introduce some reference to me.I know that critical thickness theory is solved rigorously and ursed to validated a useful approximation which is combined with slip distance theory modified for a finite structure size . (physical life review letters :elastic limit and strain hardening of thin wires in torsion)

The use of IOSO Optimization and ABAQUS at Civil Structures of NPP (from ABAQUS Users' Conference)

Submitted by IOSOnier on
industry
ABAQUS
design optimization
IOSO
Civil Structures

At the stage of NPP civil structure design for determination of stress-strain state (SSS) at static and dynamic loading ABAQUS is widely used. Hereto the floor response spectra are determined for calculation of loadings on the equipment at special dynamic impacts (seismic, air shock wave, aircraft crash). In case if the obtained characteristics of SSS or spectral accelerations exceed maximum permissible values, designers take actions on strengthening the corresponding structural components.

fracture energy for hashin damage evolution using Abaqus

Submitted by ducbro on
education

hi everyone,

i'm modelling the impact on the composite carbon/epoxy using Abaqus 6.9.

i have the questions:

when i use damage evolution for hashin damage criteria,  i need the values of the fracture energy: longitudinal tensile fracture energy, longitudinal compressive frecture energy, transverse tensile fracture energy, transverse compressive fracture energy. i'm suggested to use the values as 12500, 12500,2500,2500. Are these correct? i dont know how to evaluate these values. Is there any suggestions?

wait for reponse.

regard :d

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