Testing Products for EN 1465
ShearAlignment: Any twist in the joint during the pull will create a peel force and lower the shear value.
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Alignment: Any twist in the joint during the pull will create a peel force and lower the shear value.
Loading Rate: The increase of load must be perfectly linear (2400 N/s) to ensure repeatable breaks.
The r-value: High r-values mean the metal can be stretched into complex shapes without thinning.
Stiction: The Break-loose force is the static friction spike before the plunger moves.
Shear Correction: Composites are so stiff that the rollers can slightly indent the material.
Anti-Buckling: Similar to ASTM D6641, but specifies different fixture dimensions (Standard 2).
Fiber Rotation: As you pull, the fibers rotate; the test is valid only up to 5% shear strain.
The Nail Effect: Coated fabrics can fail by the coating peeling off the fabric during the pull.
Deflection Control: ISO 178 requires correction for machine compliance if not using a deflectometer.
Crack Detection: The test stops the moment the first through-crack appears in the metal.
Recovery Time: The standard measures how much the fabric creeps or fails to return to zero.
Pre-Loading: You must cycle the foam (compress/decompress) 3 times before the measurement run.
Trouser Tear: This is the most stable tear method for calculating Average Tear Force.
High Elongation: Rubbers can exceed 500% strain, requiring long-travel displacement.
Glue Line Thickness: ISO is very specific about the 0.1mm to 0.2mm bond line thickness.
Strain Accuracy: ISO 527 is much stricter than D638 regarding the preferred gauge length.
Method B vs A: Method A (Strain Rate Control) is now the preferred way to minimize data scatter.
Low Force Sensitivity: The sliding force is often under 10 grams; sensor choice is critical.