Testing Products for ASTM D3846
APP-D3846Measures shear strength of reinforced plastics by loading notched specimens in compression. This configuration focuses on the Newton-Series control architecture to ensure high-fidelity data acquisition. Utilizing a 32-bit digital signal processor, the system provides a superior Signal-to-Noise Ratio (SNR), which is essential for capturing precise material transitions that lower-resolution systems often miss.
The load frame for this application has been selected to provide the most cost-effective solution capable of meeting the standard’s peak force requirements. While TestResources offers a wide range of frame geometries, this specific selection represents the optimal balance between laboratory CAPEX and technical compliance. Any frame in our catalog meeting the minimum load rating will adhere to the standard; however, this configuration is our primary recommendation for those seeking a reliable, streamlined testing platform without unnecessary complexity.=
Notch Alignment: The two notches must be on opposite sides and offset by exactly 0.25 inches.
Use a Support Jig to prevent the thin specimen from buckling while being loaded in compression.
Regulatory & Test Details
| App Id | APP-D3846 |
|---|---|
| App Standard | ASTM D3846 |
| Standard Organization | ASTM |
| Test Type | Shear |
| Material Type | Composite |
| Specimen Type | 0.5" x 3.125" Notched Bar |
| Industry Type | Marine |
| Min Force Kn | 2 |
| Max Force Kn | 20 |
| Max Spd Mm/m | 1.3 |
| Expert Spd | Compression-shear speed must be slow enough to allow the V-notched specimen to fail in shear without the sides of the fixture inducing friction. |
| Pointer App Software | N-ASTM-D3846 |
| Pointer Fixture Family | G-ASTM-D3846 |
| Pointer Strain Family | E-ASTM-D3846 |
Implementation Commentary
This measures Interlaminar Shear and is the best way to see if your composite resin bonded correctly.
Common Pitfalls
Cutting the notches too deep, which causes the specimen to snap in tension rather than shear.