how do i get the realistic design model ?

Shabbik Shafiulla

i am using the objective function has minimize compliance and i have give volumefrac 30% and i am getting the model as shown below and how do i improve the model to realistic model ? how do stiffen the blue part i mean ribs.

Thankyou 

Simon Križnik

Recommended bounds are 0.0 and 2.0 for shells, or 3.0 for solids.

Also try DOPTPRM, TOPDISC

 

Adriano Koga_20259

are you using Solid or shell model?

If it is a shell, you could provide a minimum/base thickness for your shell, so that a minimum layer is kept.

If it is a solid, then you can play a little bit more with some optimization parameters such as mininum and maximum member size.

Shabbik Shafiulla

I am using Shell model of 2D Cantilever Beam (L=1000MM, B=100MM, H=100mm ,Thickness=1MM)and i have given base thickness of 0.01 i got model shown below but still there is a lot of quasi elements (blue part )i should have the stiffness(ribs) between the red part (top and bottom)  how do i get the ribs in between the red parts.

thank you

Simon Križnik

Iso value helps in interpreting designs and understanding load paths. During the course of Optimization the density value continuously changes from 0 to 1 (normalized value). At the end of the last iteration each element would have retained some material density and this is based on the strain energy. Higher the strain energy density inside an element higher is the density value (say closer to 1). You can safely assume that elements with lower density values do not take much part in carrying the loads so elements with density values up to 0.3 or 0.4 can be discarded and the remaining elements with higher values carried forward for design fine tuning. To interpret designs better from a topology run you can use the DISCRETE parameter which pushes all semi dense elements closer to either 0 or 1. This results in a discrete design and avoids the guessing of what density value should be chosen for the Iso Value plot.

Shabbik Shafiulla

how do i use the discrete parameter what all values i should give ? i tried giving 0.8 but it doesn't change much. 

Simon Križnik

Recommended bounds are 0.0 and 2.0 for shells, or 3.0 for solids.

Also try DOPTPRM, TOPDISC

 

Shabbik Shafiulla

Thank you.