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IV.3.3 Composite thermal properties

The example illustrates the calculation of laminate thermal properties. The example is presented in directory “TESTSAT/RUBY/EX12”, in file “testClaTherm.rb”.

The following statements correspond to the introduction of isotropic thermal properties in a material:

   mat1=ClaMat.new  
   mat1.Id="mat1"  
   mat1.Type="isotropic"  
   mat1.fillThermalData({"lambdaT"=>170.0,"rho"=>2700.0,"Cp"=>17.0})  
   db.insertMaterial(mat1)

similarly, one defines an anisotropic material as follows:

   mat1=ClaMat.new  
   mat1.Id="mat_aniso"  
   mat1.Type="anisotropic"  
   mat1.fillThermalData({"lambdaT1"=>170.0,"lambdaT2"=>17.0,  
      "lambdaT3"=>17.0,"lambdaT12"=>0.0,"lambdaT23"=>0.0,  
      "lambdaT31"=>0.0,"rho"=>50.0,"Cp"=>17.0})  
   db.insertMaterial(mat1)

The thermal properties stored in a ClaMat object can be printed with the following statements:

   lambdaMat = mat2.getInPlaneLambdaT  
   printf("' n' n   lambdaMat:' n' n")  
   lambdaMat.each do |line|  
      line.each do |cell|  
         printf("%14g",cell)  
      end  
      printf("' n")  
   end  
   printf("' n")  
   printf("   rho = %g' n",mat2.getRho)  
   printf("   Cp = %g' n",mat2.getCp)  
   printf("   rho * Cp = %g' n",mat2.getRhoCp)

One also defines a method that calculates and prints laminate thermal properties:

   def writeLamThermalProperties(os,lam,db)  
      lam.calcLaminateProperties(db)  
      mat = lam.get_LambdaT  
      os.printf("' n' n   LambdaT:' n' n")  
      mat.each do |line|  
         line.each do |cell|  
            os.printf("%14g",cell)  
         end  
         os.printf("' n")  
      end  
      os.printf("' n   R33T = %g' n",lam.get_R33T)  
      os.printf("   RhoCpH = %g' n",lam.get_RhoCpH)  
   end

This method is called with the following statement:

   writeLamThermalProperties(STDOUT,lam,db)