Hello everyone
I am using USDLFD subroutine in FORTRAN to model a component with 2 materials and smooth transition btwn both.
I based my work on the functionally graded structure and volume fraction. I used a sigmoid law in order to have a continous transition btw both materials.
I subdivided...
Hello the community,
I want to make a simple example of FGM (functionally graded materials) finite element model but with continuous variation in elements. Not by modeling each layer with a different property buy by displaying the continuous transition between MAT A and MAT B in an element. See...
Hello,
I want to model the mechanical behavior of a printed component with multi material subjected to static load. The thing is I do not know how to model the materials data in my fe model.
I attached a picture of an example of multi material printed element.
I use ALTAIR HYPERMESH to...
Hello everyone,
I recently bought a 3D printer at home and I discover the joy to create parts with complex geometry for the day life. So I was wondering what could be the application in aircraft design. In fact this technology is 30 years old and if I don't say anything wrong there is just few...
Hello everyone,
I was wondering what is the effect of ribs position on a wing on the aerodynamic behavior and especially on the aeroelastic behavior. Does the position of ribs can change the dynamic behavior for a flutter phenomena for example.
I am not an expert in aircraft design so I do...
Hello everyone,
I made the same analysis in NASTRAN and ABAQUS in order to compare their performance and results.
It's a modal dynamic analysis (half sine shock), the shock is 0.011 s long and my analysis time is 0.22 s in order to see the behavior of the structure after the shock.
In...
Hey everybody
I want to make a modal dynamic analysis and I have to define the damping coeff of my structure. I am new to ABAQUS and I used to make analysis on NASTRAN.
Is the definition of this coeff is the same in both codes?
Thk in advance!
Hello everyone,
I want to calculate the response of a structure under a shock in NASTRAN.
I am using SOL 112 and the SPC/SPCD method: create SPC in my modal analysis input file (with restart lines), make a restart in my shock response file and using SPCD to apply my loading (TLOAD2).
The...
Dear all,
I have to compare ABAQUS and NASTRAN on sine sweep frequency analysis, I made my two input files (.inp for ABQ and .dat for NSTRN).
For NASTRAN I first made a modal analysis on a separate .dat input file and I defined my boundaries (SPC) in this file. I made a restart procedure in...
Dear all,
I want to perform a sine sweep analysis on an assembly and I wanted to be sure that the *STEADY STATE DYNAMIC was the good method for this. Can anyone tell me that's good?
I have another question, I want to make a restart from a modal anaylsis but every time wy analysis failed, it is...
Hi everybody!
I performed a modal analysis in a previous job and I want to make a restart input file in order to make a modal transient analysis on the same structure with the *MODAL DYNAMIC
In my modal analysis input file I wrote before the *END STEP: *RESTART, WRITE and a t the beginning of...
Dear all,
I want to simulate a half sine shock on a structure. For that I used the *MODAL DYNAMIC keyword, I have my input period signal (so my time step) and I can define my number of increment by just selecting a time increment.
The thing is that I don't want to have a constant time...
