Pouya Haghdoust

9 Questions 4 Answers 0 Followers

Questions related from Pouya Haghdoust

How to convert a UMAT into VUMAT?

Dear Colleagues I am using a UMAT for modeling the hysteresis behavior of a Material.It is a simple UMAT which modify the elastic modulus of the material at different strains in order to reproduce...

29 June 2017 4,980 1 View

Viscoelastic Material definition in Abaqus ?

dear colleaguesIn the picture you can obsrve the Stress-Strain hysteresis loop for two different materials. I need to know how can I use these cyclic test data to define viscoelasic behavior in...

14 September 2016 5,543 2 View

How is Symmetry definition in abaqus for this case ?

In the Picture below you can see the geometry which I should investigate.The one in the left is the complete geometry , and the one in the right is the one which I should use as the model in...

15 March 2016 8,719 3 View

How to define symmetry with respect to 2 Coordinate system in Abaqus?

Dear Colleagues I need to define some symmetry condition for my model in Abaqus and I have to use at least two Coordinate systems.But Each Time I run the analysis it gives me an error which tells...

14 March 2016 6,217 3 View

How can I define the damping of the material in the Abaqus ?

I am modelling a Hybrid layered structure consisting two different materials. I have available the loss factor of both materials by the Experiments. How can I associate these loss factors to the...

02 February 2016 8,139 4 View

Is loss Factor a property of the material ?

Consider two cantilever beams , all the conditions equal but with different cross sections .Will they show the same loss factor if they start to vibrate with same condition?In fact I need to know...

27 February 2015 9,734 16 View

What is the physical reason of adhesion increment between layers when holes are introduced ?

Please take a look at the picture.I am trying to modell the depicted composite . We have experimentally observed that the hole introducing in the thin film layer will lead to an increment of...

05 December 2014 6,915 6 View

What s the measure for delamination ?

Please consider a 3 layered hybrid composite . With a Cu-Zn-Al thin film in the middle and carbon fiber - epoxy laminate on the top and bottom.The point is that I have optimized the shape of...

03 December 2014 7,768 5 View

How can I optimize the geometry for damping issues ?

Can anyone please tell me how should I optimize a geometry for damping issues ?Consider a laminated composite beam with a SMA thin film in the middle. And let's think the beam is vibrating in it's...

29 November 2014 7,169 3 View