6.3 Composite Materials (`composites`)

6.3 Composite Materials

Design laminate layups and composite section behavior

Standards catalog

Validation: indicative · Method band: advanced-numerics

Indicative method: Indicative closed-form or numerical model

Linear elastic material behavior unless noted otherwise.
User is responsible for load combinations and load factors per the selected design code.

Does not replace a licensed professional engineer or official code compliance review.

Check	IND	US	EU	ISO
Effective modulus	implemented	—	—	—
Strength utilization	implemented	—	—	—

Purpose: Rule-of-mixtures effective properties for unidirectional laminate.

Method: Closed-form micromechanics

E_L = E_f V_f + E_m V_m, \quad \frac{1}{E_T} = \frac{V_f}{E_f} + \frac{V_m}{E_m} $$[^indicative-modulus-and-strength-utilization] (similar for strength) **Design codes:** Indicative modulus and strength utilization. **UI:** Legacy layout; unit profile. **Gaps:** No ply stacking, failure criteria (Tsai–Wu, Hashin), or plate bending; **advanced-numerics** maturity band with high refactor risk. --- [^indicative-modulus-and-strength-utilization]: Indicative modulus and strength utilization.

Maintainer note: Domain-rich behavior and higher model/assumption complexity.

6.3 Composite Materials