Testing Products for ASTM D7291
APP-D7291Flatwise Tensile Strength of Composites. Measures through-thickness (out-of-plane) tensile strength.
Application Insight:
Uses bonded loading blocks to pull the specimen apart.
Pro Tip:
Adhesive strength must exceed the material’s interlaminar strength.
Regulatory & Test Details
| App Id | APP-D7291 |
|---|---|
| App Standard | ASTM D7291 |
| Standard Organization | ASTM |
| Test Type | Tension (Flatwise) |
| Material Type | Composites |
| Specimen Type | Circular/Square Sandwich |
| Industry Type | Aerospace |
| Min Force Kn | 1 |
| Max Force Kn | 100 |
| Max Spd Mm/m | 1 |
| Expert Spd | Prevents adhesive shock in flatwise tension; a slow rate ensures the load is distributed evenly across the entire bonded surface area. |
| Pointer App Software | N-ASTM-D7291 |
| Pointer Fixture Family | G-ASTM-D7291 |
| Pointer Strain Family | E-ASTM-D7291 |
Implementation Commentary
Essential for evaluating 3D-woven composites or honeycomb cores.
Common Pitfalls
Misalignment of the loading blocks causing peeling.