# PARAM, SRCOMPS

Bulk Data Entry Outputs the strength ratios for composite elements that have failure indices requested.

Parameter Values Description
SRCOMPS <YES, NO, blank>
YES
The strength ratios are output for composite elements that have failure indices requested. (The Output formats currently supported are: H3D, HM, OP2, PCH and OPT).
NO (Default), blank
The strength ratio will not be output.

1. The Strength Ratios that are output as a result of PARAM, SRCOMPS, YES depend on the Failure Theory specified by the user. The following equations show the relationship between the Failure Index and the Strength Ratio for different Failure Theories.
• Hill Failure Theory:
$\mathit{Strength} \mathit{Ratio}=\frac{1}{\sqrt{\mathit{Failure} \mathit{Index}}}$
• Hoffman Failure Theory:

There is no direct relationship between the Strength Ratio and Failure Index (refer to Composite Laminates in the User Guide for more information). OptiStruct solves the quadratic equation to find the strength ratio.

• Tsai-Wu Failure Theory:

There is no direct relationship between the Strength Ratio and Failure Index. (refer to Composite Laminates in the User Guide for more information). OptiStruct solves the quadratic equation to find the strength ratio.

• Maximum Stress (Strain) Failure Theory:
• Transverse Shear Failure Theory:
• Cuntze Failure Theory: