Physical Testing

Grab Tensile Strength Statistics Calculator (ASTM D5034)

A mean that clears the minimum with 12% variation is not a pass. Report the lower confidence limit and the argument ends there.

Specimen Breaking Forces Five per direction
N
N
N
N
N
Specification Acceptance
N

Mean Breaking Force

— N

Average of the five grab specimens

Dispersion & Acceptance

Standard Deviation
— N
Coefficient of Variation
— %
Range
— N
95% Lower Confidence Limit
— N
Mean Over Minimum
— N
Lower Limit Over Minimum
— N

Fixed at five specimens, which is the D5034 minimum per direction; the t value is set accordingly. Warp and weft must be run and reported separately — averaging the two directions together is not a D5034 result.

Grab Tensile Strength Statistics Calculator (ASTM D5034) — free, with the formula and a worked example, at Textile School.