Fig. 3.

Dimensional analysis of dumbbell coupons. A) The calibration square and elastomer coupon were imaged, cropped (white box), and B) segmented to create a width distribution plot. Mean gauge width was measured in the center span, and the intra-specimen variation in gauge width was measured within the target gauge length (GL), where the target values match the designed dimensions of the device. The upper and lower limits of effective GL were detected when width variation exceeded 5%. C) Coupons were centered about a vertical axis (white dashed line) and asymmetry of the coupon about this axis was quantified. D) These same operations were applied to bovine meniscus.