Impact, vibration and hardness use different loading methods
- Impact resistance
A specified impact is applied to the mounted specimen. Acceptance considers the required functions, not merely its visible appearance.
- Vibration resistanceThis term
The assembly is exposed to the specified motion and mounting conditions. Inspect retention, seals, contacts and other required functions afterward.
- Shore hardness scales
The durometer uses the specified tip and spring force. Shore scales are not interchangeable across different materials and methods.
- Vickers / Rockwell / Knoop hardness
Vickers and Knoop evaluate their specified indentation geometries; Rockwell uses depth and scale-specific loading. State the method and scale.
- PSD
Power spectral density distributes mean-square content over frequency. Units and normalization must match the measured quantity and method.
A blow, repeated motion and an indentation create different material responses. Vibration spectra describe frequency content, while hardness methods require their own indenter and measurement scale.
Conceptual fixtures and traces without loads, profiles or pass criteria. Mounting, specimen geometry, conditioning and post-test functions belong to the applicable method.