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Giri

Ceramic Fatigue Analysis

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2 hours ago, Prakash Pagadala 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.

 

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2 minutes ago, Giri 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.

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1 hour ago, Rahul R 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.

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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 

jpb2mstefuca_xfem3jun2014.zip

XFEM.zip

Rahul Ponginan and Giri like this

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