Testing Products for ASTM d2990
APP-D2990Determines tensile, compressive, and flexural creep and creep-rupture of plastics. This method measures the time-dependent strain of materials under constant load over extended durations. The Newton-Series architecture is utilized for long-term stability and precise load maintenance. The 32-bit digital signal processor ensures a high Signal-to-Noise Ratio (SNR), which is critical for resolving minute strain increments over thousands of hours. The load frame selection provides technical compliance with the necessary dead-weight or servohydraulic load application requirements while optimizing laboratory CAPEX. This configuration represents the primary recommendation for standardized creep performance verification without unnecessary system complexity.
Thermal Drift: In long-term creep tests, ambient temperature fluctuations can cause sensor drift.
Utilize a temperature-compensated load cell and environmental chamber to maintain ±1°C stability.
Regulatory & Test Details
| App Id | APP-D2990 |
|---|---|
| App Standard | ASTM d2990 |
| Standard Organization | ASTM |
| Test Type | Creep |
| Material Type | Plastics |
| Specimen Type | Tension/Compression Bars |
| Industry Type | Aerospace, Medical |
| Min Force Kn | 0.5 |
| Max Force Kn | 50 |
| Max Spd Mm/m | 1 |
| Expert Spd | Optimized for creep-rupture initialization. Ensures a smooth hand-off from ramp-loading to the load-maintenance phase without force spikes. |
| Pointer App Software | N-ASTM-D2990 |
| Pointer Fixture Family | G-ASTM-D2990 |
| Pointer Strain Family | E-ASTM-D2990 |
Implementation Commentary
The 32-bit DAQ is essential for resolving strain increments at the micron level over 1,000+ hours.
Common Pitfalls
Failure to account for initial instantaneous strain before starting the creep clock.