Coefficient Ratio Exceeds 1.0e8 - Check Results

The warning message is a critical warning issued by finite element analysis (FEA) solvers, most notably Ansys Mechanical . It indicates that the global stiffness matrix has become ill-conditioned.

Once diagnosed, several strategies can reduce the coefficient ratio to acceptable levels (typically below 1e6 ).

Look for outliers. In CFD, a single cell with aspect ratio 5000 can trigger this warning. coefficient ratio exceeds 1.0e8 - check results

: Highly "stretched" or distorted elements can cause the Jacobian (the mathematical mapping of the element) to become near-singular. Contact Issues

However, as a rule of thumb:

An inflated coefficient ratio rarely stems from a solver bug; it is typically triggered by modeling inconsistencies. 1. Mixed Unit Systems and Scale Mismatches

: Highly distorted or "sliver" elements can create extreme local stiffness values. The warning message is a critical warning issued

: Double-check that all material constants use a consistent unit system (e.g., N, mm, MPa). Check Constraints Ansys Help Troubleshooting Guide

A "Coefficient Ratio" is generally defined as the ratio of the largest coefficient in the matrix to the smallest non-zero coefficient. Look for outliers