Material Flow and Advanced-Mechanical Properties in Inspire Cast

Guilherme_Costa
Guilherme_Costa Altair Community Member
in Community Q&A

Hi everyone,

I am currently working with Inspire Cast and have some questions regarding material behavior during solidification and the parameters available in the Advanced-Mechanical tab. I would appreciate any insights you could share.

  1. In the region between the liquidus and solidus temperatures, does the material flow account for the effect of the solid fraction on viscosity, or would this need to be manually adjusted in the viscosity value for that region? Would a semi-solid leakage be possible if the temperature is below the liquidus? If not, how does the simulation handle this scenario?
  2. Could you explain the meaning of the parameters in the Advanced-Mechanical tab ("Linear_hardening_coefficient", "Plastic_viscosity", Rate_sensitivity", "Pc_strain", "Minimum_solid_fraction_yield_surface", "Minimum_solid_fraction_material_properties") ? I noticed they are the same for all standard materials, except for the Linear Hardening Coefficient, which seems to be 1/100 of the Young’s modulus value at 298 K. Perhaps some of these parameters are related to my first question.
  3. I also noticed that the XML file for material properties includes the following entries:
    1. <prop id="Isotropic_hardening" value="None"/>
      <propTable id="Saturation_flow_stress">
      <propTable id="Saturation_hardening_law_exponent">
      <prop id="Kinematic_hardening" value="None"/>
      <propTable id="Linear_kinematic_hardening">
      <prop id="Use_composition_model" value="No"/>
      <prop id="Base_component" value="Fe"/>

These parameters do not appear in the standard material tables. Are they currently used in the simulations, or are they planned for future implementation? Regarding the "Base_component" value="Fe", does this mean the software uses Fe properties to fill gaps in material parameters?

Lastly, what happens if I select a temperature outside the defined range for a given property? For example, I noticed that thermal conductivity often has a limited range in the database. Would the simulation use the last available value in the table?

Thanks in advance for your clarifications!

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