Modeling a Composite Materials With Ansys

Jafar Hasanpoor

FINITE ELEMENT IN CONTINUUM MECHANICS

FINAL PROJECT

E (GPA) Poisson Ratio

DENSITY(Kg/m^3)

H1(mm) H2(mm) Shear modulus(Mpa)

Poisson Ratio

DENSITY(g/cm^2)

Ht(mm)

70 .22 2500 10 5 36.2 .491 .95 2.5

Glass Properties Polymer Properties

H1

Ht

H2

Glass

Glass

Polymer

Glass and polymer are linear elastic.

Modeling laminated glass as a BeamWhen you want to model a composite material if you sketch like this shape, ansys consider whole shape as one body.

In order to solve this issue, I suggest to follow these steps:

1.Draw whole shape

2.Define virtual plane in appropriate elevation

3.Extrude the shape

4.Use Slice and virtual plane for cutting the shape.

Three dimensional model

Boundary Conditions

Contacts Contacts Define two contacts :

1. Top Glass with polymer

2. Bottom Glass with polymer

Mesh I meshed separately for each body and each contacts .Total Elements : 180000 Total Nodes : 870639

Results

Validating the Model

Wolfel Equations

Finding Effective thickness from Ansys Output

Method Deflection effective thickness (mm)

Stress effective thickness (mm)

Ansys 18.97 18.92

Wolfel 16.61 17.05

Effect of shear Modulus of Polymer

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 20010

12

14

16

18

20

22

Deflection- Effective Thickness

AnsysWolfel

Shear Modulus (Mpa)

Hef (

mm

)Shear Modulus (Mpa)1.55

3.77

11.8

36.2

77

151

200

Effect of shear Modulus of Polymer

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 20010

12

14

16

18

20

22

Stress - Effective Thickness

AnsysWolfel

Shear Modulus (Mpa)

Hef (

mm

)Shear Modulus (Mpa)1.55

3.77

11.8

36.2

77

151

200

MeshingTotal Elements : 720000Total Nodes : 3264039

Results

Finding Effective thickness from Ansys OutputAt the center

Results

Method Deflection effective thickness (mm)

Stress effective thickness (mm)

Laminated Glass as beam 12.47 13.72

Laminated Glass as Plate 11.38 12.95