Example 7.8 Viscoelastic Computational Micromechanics Homogenization of Fiber Composite using Abaqus

In this example, we have a viscoelastic matrix reinforced by elastic fibers. Using computational micromechanics, we want to calculate the viscoelastic properties of an equivalent, homogeneous material, that behaves exactly like the real material. In this way, when simulating a large structure, such as the wing of an aircraft, we don't have to discretize all the fibers, which would be impossible. The fiber is elastic, and the matrix is viscoelastic. Since the matrix is also isotropic, we can use Abaqus as is.


Table of Contents:

00:00 - Introduction
00:51 - Set Work Directory
01:40 - Edit fiber
02:01 - Instantaneous
02:08 - Edit matrix
02:35 - Viscoelastic properties
03:04 - Sudden load
03:54 - Relaxation step
04:25 - File Output Request
04:46 - Delete RP
05:05 - Delete old interactions
05:26 - Master @ bottom
05:49 - Slave @ top
06:01 - Edit tie constraint
06:22 - Master @ left
06:48 - Slave @ right
07:07 - Edit tie constraint
07:32 - Load
07:42 - U1=0 @ bottom
08:18 - U1 @ top for shear
09:07 - Job
09:23 - Results
09:34 - S12
09:40 - Step/Frame
10:14 - Stress Recover 2D
10:54 - Average stress, frame=0
11:11 - Plot
11:16 - End card

[fahimfazlullah]

professor do you know how to implement orthotropic viscoelasticity in Abaqus?

[gaganaut]

Professor,
you have given a shear strain in X direction, that means its G12
at the end, the plot shown is G23
it has to be G12 right ?
is my understanding Correct ?
Kindly request Guidance

[samansayahlatifi]

Professor,
Thank you very much for this useful tutorial. I have a 3D RVE and I want to extract the homogenized stress versus strain curve. Would it be possible to get the curve with the Python code that you provided in this video? Any comments are highly appreciated.
Thank you