Ceramic Fatigue Analysis

Altair Forum User

Any Idea, how one can perform fatigue analysis of structural ceramic materials?

 

Thanks.

Altair Forum User

Hi Giri,

 

what material propertied do you have for ceramic?

 

What is your end objective?

Altair Forum User

Altair Forum User said:

Hi Giri,

 

what material propertied do you have for ceramic?

 

What is your end objective?

 

ALON, aluminium nitride.

 

Major props:

Structure                         Cubic, Spinel
Lattice Constant              7.956–7.936 Å
Density                            3.69 g/cc
Form                               Polycrystalline
Melting Point                  2150°C
Young’s Modulus           320 GPa
Shear Modulus                135 GPa
Poisson’s Ratio               0.24
Hardness                         1800±100 kg/mm2
(Knoop indentation, 200g load)
Fracture Toughness        2.0MPa-m1/2
Flexure Strength             300-700 MPa

 

Specs: http://www.surmet.com/pdfs/ALON%20Data%20Sheet.pdf

 

Objective: Cyclic loading. HCF. Find the damage, life expectancy.

 

Altair Forum User

Altair Forum User said:

 

ALON, aluminium nitride.

 

Major props:

Structure                         Cubic, Spinel
Lattice Constant              7.956–7.936 Å
Density                            3.69 g/cc
Form                               Polycrystalline
Melting Point                  2150°C
Young’s Modulus           320 GPa
Shear Modulus                135 GPa
Poisson’s Ratio               0.24
Hardness                         1800±100 kg/mm2
(Knoop indentation, 200g load)
Fracture Toughness        2.0MPa-m1/2
Flexure Strength             300-700 MPa

 

Specs: http://www.surmet.com/pdfs/ALON%20Data%20Sheet.pdf

 

Objective: Cyclic loading. HCF. Find the damage, life expectancy.

 

 

 

And Weibull model is used for reliability analysis, instead of SN curve. No idea, how can I use it in Hypermesh.

Rahul Rajan_21763

Hi,

 

If model is having shell elements you can try with Radioss XFEM to simulate crack propagation.

 

Regards

Rahul R

Altair Forum User

Altair Forum User said:

Hi,

 

If model is having shell elements you can try with Radioss XFEM to simulate crack propagation.

 

Regards

Rahul R

 

Great but I don't have any idea. Is their any documentation (tutorial) or sort?
Can't it be done in Optistruct?

 

Thanks.

Rahul Rajan_21763

Hi,

 

I have attached few examples of XFEM for crack propagation.From Radioss 14.0 it will work for solid elements aswell.

In Optistruct we can do fatigue analysis using stress & strain based approach(Not sure for cermaics).Refer online tutorials for more information.

 

Regards

Rahul R 

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