Hi,
I'm creating a laminate in PATRAN with two different materials with different damping coefficients (0.001 and 0.1):
[pre]$ Material 1
MAT1 1 7.+10 .3 2700. .001
$ Material 2
MAT1 2 5.+10 .4 700. .1[/pre]
When looking into the PCOMPG card created in the .bdf, PATRAN has simply calculated an average with respect to the thickness ([tt][tt][tt][/tt][/tt][/tt]0.067) of both the damping coefficients (what doesn't seem to make any sense), as shown below:
[pre]PCOMPG 1 .067
1 1 .001 0. YES
2 2 .002 0. YES[/pre]
What can I do to get a reasonable equivalent damping coefficient for the laminate created? Should I work instead with complex stiffness for both materials?
Thanks in advance.
I'm creating a laminate in PATRAN with two different materials with different damping coefficients (0.001 and 0.1):
[pre]$ Material 1
MAT1 1 7.+10 .3 2700. .001
$ Material 2
MAT1 2 5.+10 .4 700. .1[/pre]
When looking into the PCOMPG card created in the .bdf, PATRAN has simply calculated an average with respect to the thickness ([tt][tt][tt][/tt][/tt][/tt]0.067) of both the damping coefficients (what doesn't seem to make any sense), as shown below:
[pre]PCOMPG 1 .067
1 1 .001 0. YES
2 2 .002 0. YES[/pre]
What can I do to get a reasonable equivalent damping coefficient for the laminate created? Should I work instead with complex stiffness for both materials?
Thanks in advance.