**H-Drill** - Hole-Drilling Residual Stress Calculation Program

**H-DRILL** is a specialized computer software for
doing the stress calculations for the popular hole-drilling method for measuring
residual stresses. Features of H-DRILL include:

- Works with blind or through holes
- Can use six common hole-drilling rosettes
- Handles inch or metric units
- Does extensive data error checking
- Not restricted to particular hole depths
- Uses regularization to stabilize stress solutions
- Estimates ranges of stresses for given data uncertainties
- Displays results in graphical and numerical formats
- Compliant with ASTM E837-13
- Uniform stress calculations
- Integral Method calculations for non-uniform stresses
- Power Series calculations for linearly varying stresses
- Non-directional and fixed principal direction stress calculations
- Detailed instruction manual and answers to FAQ