Testing Products for ASTM D6671
APP-D6671Mixed Mode I-Mode II Interlaminar Fracture Toughness. Combined tension and shear crack growth.
Application Insight:
Uses the Mixed-Mode Bending (MMB) apparatus.
Pro Tip:
Changing the lever arm length allows you to vary the Mode I/II ratio.
Regulatory & Test Details
| App Id | APP-D6671 |
|---|---|
| App Standard | ASTM D6671 |
| Standard Organization | ASTM |
| Test Type | Fracture Toughness |
| Material Type | Composites |
| Specimen Type | DCB with MMB Fixture |
| Industry Type | Aerospace |
| Min Force Kn | 0.1 |
| Max Force Kn | 10 |
| Max Spd Mm/m | 5 |
| Pointer App Software | N-ASTM-D6671 |
| Pointer Fixture Family | G-ASTM-D6671 |
| Pointer Strain Family | E-ASTM-D6671 |
Implementation Commentary
This is the most complex fracture test for composites; setup is intensive.
Common Pitfalls
Incorrectly calculating the lever arm offset.