Learning Forum

[子庆 曾]

Is it possible to use peridynamic theory to predict the crack propagation of concrete at temperature in the R13 version of LS-DYNA?

[Ram Gopisetti]

Hi 

Temperature dependency of peridynamics may be limited. 

Cheers, Ram 

[Reno Genest]

 

Hello,

Peridynamics in LS-DYNA has been used before to model crack propagation in concrete. But, note that the peridynamics method in LS-DYNA is limited to only 2 material models:

*MAT_ELASTIC_PERI

*MAT_ELASTIC_PERI_LAMINATE

And these material models do not have temperature dependence. If the temperature of your concrete part is constant, then you could calibrate the model for this particular temperature.

If you Google “LS-DYNA cmmg peridynamics”, you will find information from the lstc-cmmg website and more links.

Note that you can click in the letters or number in between brackets in the lstc-cmmg website to access more information and example models.

 

Even though there is no temperature dependence in the peridynamics material models, we can now model thermal expansion. You can define a zone with different temperatures using *DEFINE_FUNCTION and then include it in *MAT_ELASTIC_PERI:

 

 

The gf parameter in *MAT_ELASTIC_PERI refers to the *DEFINE_FUNCTION ID and the alpha parameter is the thermal expansion coefficient.

 

Let me know how it goes.

 

Reno.