Material Informatics

1. Developing a Structure-Property
Linkage for Glass Fibre
Reinforced Composites
ME 8883/CSE 8803: Materials Informatics
Geet Lahoti and Alicia White

2. Background
• Composites are used in many
industries
• Combines properties of the two
materials
• Forming processes create varied and
complex microstructures

3. Motivation
• The structure and organization of the
reinforcement greatly affect the final
properties of the part
• Conventional approaches do not take
into account the microstructure of
the reinforcement
• Those that do are based on a
theoretical representation not the
actual microstructure

4. Project Proposal
• Develop Structure-Property Linkage
• Real Microstructures
• Segmentation/Digitization
• Simulated Microstructures and Property Data
• Spatial Correlation (2-point Statistics)
• Dimensionality Reduction (PCA)
• Regression Model

5. Image Segmentation
• Need to separate the fiber
from the matrix to get an
accurate representation of
microstructure
• Thresholding

6. Simualted Microstructures
Fibers Elongated in Y Fibers Elongated in Diagonal Fibers Elongated in X
5 10 15 20
20
18
16
14
12
10
8
6
4
2
X
Y
2
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1

7. Simulated Property Data
• Property under consideration is going to be Young’s Modulus.
• In order to calculate it, we use FEM simulations to get the stress with
respect to the applied strain.
• Then, E = Stress/Strain

8. Simulated Property Data
FEM: Stress - Diagonal Fibers

9. Simulated Property Data
FEM: Strain - Diagonal Fibers

10. PCA on 2-Point Stats
Red – Diagonal; Green – Elong X; Blue – Elong Y

11. Regression
• Working on it !!!
• Will be here very soon !!!