Hi Guys(adsbygoogle = window.adsbygoogle || []).push({});

I am trying to figure out what stresses in different planes mean physically for composite laminates.

Say S stands for stress then

SXX SYY SZZ would be longitudinal/axial stresses in respective Axes. (If we take the laminates to be in XY plane, failure stress SZZ would be equal to laminate strength/delamination right in tension?)

SXY would be in plane shear stress. For Unidirectional, it could also give relationship for shear failure between fibres and matrix (debonding of fibres)?

For woven type composites, what would they mean? (Something complex I suppose? A laminate highly unlikely to fail in SXY if woven ? )

SXZ and SYZ would be related to delamination of composite in shear ?

Please correct me in my above statements if I am wrong.

Also, why is SZZ so important for FEA solvers (At least ANSYS). Would a very simplified loading case such as bending and/or longitudinal loading, SZZ would be redundant? How does one estimate value for SZZ analytically (no testing facility available for measuring stiffness/strength in Z direction)

Sorry if I sound confused.

Looking forward to your replies

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Understanding Composite Laminate Stresses

Tags:

Have something to add?

Draft saved
Draft deleted

Loading...

Similar Threads - Understanding Composite Laminate | Date |
---|---|

Understanding autofrettage | Jun 22, 2017 |

Understanding torque -- impact guns and high torque drills | Jun 1, 2017 |

Understanding Dyno Readings -- is HP "real world" HP? | May 28, 2017 |

Understanding FEA Results | May 23, 2017 |

Modal and Harmonic Analysis of composite | Sep 24, 2016 |

**Physics Forums - The Fusion of Science and Community**