Overview
What is CLT?
Classical Lamination Theory (CLT) is the foundational analytical framework for predicting the mechanical response of composite laminates under in-plane and bending loads. It relates applied force and moment resultants (N, M) to mid-plane strains and curvatures through the laminate stiffness matrices [A], [B], and [D].
This tool builds the full ABD stiffness matrix from a user-defined ply stack, computes the compliance (abd) matrix, evaluates ply-level stresses and strains in both laminate and material coordinate systems, and runs multiple failure criteria — all in real time as you edit your laminate or loads.
ABD Matrices
Extensional [A], coupling [B], and bending [D] stiffness matrices computed from the ply stack in real time.
Ply-Level Results
Strains and stresses at top, mid, and bottom of every ply in both laminate (x-y) and material (1-2) coordinate systems.
Failure Analysis
Twelve failure criteria including Max Strain, Max Stress, Tsai-Hill, Tsai-Wu, Hashin, Puck, LaRC03, and more.