Intrinsic Strength Module
This module measures the material’s intrinsic strength – the minimum energy release rate required to produce crack growth. Operation below this limit does not supply sufficient energy to grow a crack so the intrinsic strength is also called the endurance limit. Use this module when the material is expected to serve for a very large number of cycles.
Required for safety factor/infinite life/fatigue limit analysis .
Recommended for cases with fatigue life longer than 106 cycles.
Experiment Overview
- cutting force vs. strain, minimum 3 strain levels
- number of slabs needed for test: 3
Analysis and Reporting / Deliverables
- cutting vs. tearing curve
- cutting energy vs. strain curve
- intrinsic strength T0
Use with:
- Safe-life safety
- factor analysis
- Lake Lindley Law
