I have 1 question. Should I use material orientation if i used composite layup function?

@Professor3MEC

3 жыл бұрын

If I understood your question correctly, it may not be necessary to do so. All depends on the problem and other materials present in the model.

What should i do if i want to delete a material orientation?

@Professor3MEC

4 ай бұрын

here is a short video on that: kzread.info/dash/bejne/eIyIqZiMebWoerA.html

why should we define the orientation for some problems but not for others? and how to use *orientation subroutine with a UEL? Do you have any examples?

@Professor3MEC

2 жыл бұрын

If there is anisotropy in material behaviour then it is important to define orientation and directional properties

Sir what does those D111, D1122 etc strands for? & how to calculate them?

@Professor3MEC

Жыл бұрын

These are the number of independent components of the elasticity tensor. You can look into any theory of elasticity book to see how to get them. There are standard relationships which can be used to reduce number of constants, such as positive definiteness condition, stability criteria, etc.

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Thank you for your video! Its interesting! Now iam studying for using anisotropic polycrystal material in abaqus with euler angles data, I want to do validation regards to in-situ experimental data which in every strain the euler angles changes. Do you think its possible to extract euler angles in every strain using abaqus? If it is so, please let me know how to do it? It will be very helpfull! 🙌 My goals is to create dynamic inverse pole figure during deformation.

@Professor3MEC

5 ай бұрын

Glad that you and others are finding it useful. Which umat are you using? It may be storing or writing rotations or updated orientation which could then be used to plot orientation maps for every increment. Can you share to have a look?

I have one doubt, by default how is the material orientation is changing for elements randomly in places. Is it due to the extrude direction if it is hex elements or is the node numbering sequence changing?

@Professor3MEC

Жыл бұрын

If you mean during deformation, yes if you use finite deformation theory, then it accounts for rotation of material point and hence tracks the orientation.

@aakashs1806

Жыл бұрын

@@Professor3MEC no I meant during the modelling/meshing phase itself. How the default axis orientation changes for few elements?

@aakashs1806

Жыл бұрын

@@Professor3MEC I found from optistruct doc, seems the node numbering sequence plays role in deciding coordinate system for element

@Professor3MEC

Жыл бұрын

excellent stuff!

@aakashs1806

Жыл бұрын

@@Professor3MEC Take OS Quad element for example (CQUAD4) The node numbering sequence is in anticlockwise manner for the element This is the sequence G4------G3 | | | | G1------G2 The coordinate system is created by taking angle G3G1G2 (beta) and G4G2G1(gamma) . The angle between G3centerG2 is beta+gamma To get x direction the angle between G3centerXvector is beta+gamma/2, afterwards rotate this x vector to 90 deg wrto normal vector of element. You get y vector. This the element coordinate system. By default material coordinate and element coordinate is same, if there is need we can change by specifying another coordinate system, rotate x direction by certain angle and so on

how to make the arrow bigger without make the line longger？

@Professor3MEC

2 жыл бұрын

Which arrow?

@foreverfriday5644

2 жыл бұрын

@@Professor3MEC 12:50 red and yellow arrows

@foreverfriday5644

2 жыл бұрын

@@Professor3MEC in my case, i got big froce difference all over the surface