| Feature | ASTM E2109-01 | ASTM D3654 (common for tapes) | |--------|----------------|-------------------------------| | | Static shear (constant load) | Static shear (constant load) | | Substrate | Specified stainless steel or customer-defined surface | Stainless steel or specified panel | | Temperature control | Required (often 23°C, 40°C, 70°C) | Optional – ambient unless specified | | Failure criteria | Complete separation of adhesive from substrate or cohesive split | Similar, but E2109 includes more precise measurement of displacement | | Data analysis | Time-to-failure with Weibull or log-normal statistics recommended | Simple average and range |

ISO 29862 (formerly ISO 29862-2018) is the closest international equivalent, but E2109 allows more flexibility in load and substrate definition. ISO methods often mandate 1 kg load and stainless steel only.

(Describe the specific steps taken to align with ASTM E2109)

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