Composite Materials Stress & Fracture Mechanics Lab

Laminate & Load Setup

Material System Preset

Applied Biaxial Stress Tensor (MPa)

σx (Tensile/Comp X) 120 MPa

σy (Tensile/Comp Y) 40 MPa

τxy (In-plane Shear) 25 MPa

Ply Stacking & Orientations

Preset Laminate Layouts

Primary Ply Angle (Ply 1) 0°

Micro-Mechanics Analysis

Interlaminar Debonding Model

Micro-Structure & Load Vector Canvas Drag Vector Handles

Directly drag stress handles or adjust fiber angles to observe fiber-matrix micro-stress fields and debonding risks.

Max Fiber Stress

128.4 MPa

Matrix Shear Stress

28.1 MPa

Failure Criteria & Envelope Diagram

Ply-by-Ply Stress Transformation & Margin of Safety

Ply #	Orientation (θ)	σ1 (Fiber Tens/Comp)	σ2 (Matrix Trans)	τ12 (In-plane Shear)	Tsai-Hill Index	Tsai-Wu Index	Governing Mode	Margin of Safety

Structural Verification & Analysis Summary

Laminate Status: SAFE (PASS)

All plies operate within the calculated Tsai-Hill and Tsai-Wu safe envelopes under current tensor loads.

Governing Failure Index

0.704

Material System

Carbon Fiber/Epoxy

Critical Ply

Ply 4 (90°)

Governing Failure Mode

Matrix Tension

Overall Margin of Safety

+0.420