Glassfiber Reinforced Epoxy Pipe - Poisson's ratio
Glassfiber Reinforced Epoxy Pipe - Poisson's ratio
(OP)
Hello,
I am doing deflection analysis of a pipe using GRE (Glass reinforced epoxy) pipe for which i ahve the following properties @ 21 Deg. C from material supplier
Hoop Tensile modulus = 23250 MPa
Poisson's ratio axial/hoop = 0.93
Axial Tensile Modulus = 10000 MPa
Poisson's ratio hoop/axial = 0.40
In FEA when i enter the poisson's ratios i get a message that the values ae not practical or with these values strain energy will be negative. I am using transvere isotropic format for GRE in FEA.
Will you suggest me on how to correct the problem of poissonss ratio.
I am doing deflection analysis of a pipe using GRE (Glass reinforced epoxy) pipe for which i ahve the following properties @ 21 Deg. C from material supplier
Hoop Tensile modulus = 23250 MPa
Poisson's ratio axial/hoop = 0.93
Axial Tensile Modulus = 10000 MPa
Poisson's ratio hoop/axial = 0.40
In FEA when i enter the poisson's ratios i get a message that the values ae not practical or with these values strain energy will be negative. I am using transvere isotropic format for GRE in FEA.
Will you suggest me on how to correct the problem of poissonss ratio.





RE: Glassfiber Reinforced Epoxy Pipe - Poisson's ratio
Where did you determine your youngs modulus from, it seems high?
RE: Glassfiber Reinforced Epoxy Pipe - Poisson's ratio
ANSYS is showing an error in poisson's ratio. I was thinking that poisson's ratio of 0.93 is not correct. but i am not sure.
Please suggest.
Arline
RE: Glassfiber Reinforced Epoxy Pipe - Poisson's ratio
RE: Glassfiber Reinforced Epoxy Pipe - Poisson's ratio
check for more appropriate values
RE: Glassfiber Reinforced Epoxy Pipe - Poisson's ratio
Poisson's ratio axial/hoop = 0.65
Axial Tensile Modulus = 12500 MPa
Poisson's ratio hoop/axial = 0.40
Above are the revised properties after speaking material supplier.
Can somebody help in understanding the "Poisson's Ratio AXIAL/HOOP". I typically always seen as just poisson's ratio but why they are saying that Axial/hoop and Hoop/Axial.
Assume the pipe axis in Z-direction, then what will be PR(Poisson's ratio ) in XY, YZ & ZX directions from above given values.
Which formula i need to use to calculate shear modulus for transverse isotropic materials.
Please help me in my learnings about composite.