Composite Cantilever: Exploring Ply Angle Effects in Carbon-Fibre Laminate Stiffness and Failure

What is a Composite Cantilever?

A composite cantilever is a structural element made from layers of composite materials, often carbon fibre reinforced polymers (CFRP), bonded together to form a laminate. This structure is designed such that one end is fixed and the other is free to deflect under load.

In this simulation, you can manipulate the ply angle and fibre fraction to observe how these parameters influence the mechanical properties of the composite material.

Understanding Ply Angle Effects

The ply angle refers to the orientation of the fibres within each layer of the laminate. Different angles affect the stiffness and strength of the composite in different directions.

By changing the ply angle, you can observe how the off-axis stiffness changes, which is crucial for designing structures that need to resist loads applied at an angle.

Tsai-Hill Failure Criteria

The Tsai-Hill failure criterion is a method used to predict the first-ply failure in composite laminates. It takes into account the stress state and material properties of each ply.

By calculating the Tsai-Hill failure index for every ply, you can determine which plies are most likely to fail under specific loading conditions.

Halpin-Tsai Ply Constants

The Halpin-Tsai model is used to predict the effective elastic properties of composite materials. It accounts for the fibre volume fraction and orientation, providing a way to estimate off-axis stiffness.

In this simulation, you can input these constants to better understand how they influence the overall mechanical behavior of the cantilever.

Frequently asked questions

Try it live

Everything above runs in your browser — open Composite Cantilever: Ply Angle, Off-Axis Stiffness and Tsai-Hill First-Ply Failure and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.