In the SFRM bond strength example, which test cap area was used?

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Multiple Choice

In the SFRM bond strength example, which test cap area was used?

Bond strength in an SFRM test is calculated as the load applied divided by the cap area that contacts the material. That cap area sets the stress over which the bond is tested, so choosing a specific area directly determines the reported bond strength. The given example uses a cap area of 0.0576 square feet. Converting that to square inches gives about 8.29 in², which corresponds to a circular cap with a diameter of roughly 3.25 inches. This exact size is what the worked calculation assumes, so the resulting bond strength matches the scenario shown in the example. If a different cap area were used, the computed bond strength would change because you’re dividing by a different area. The other area options would imply different cap sizes and would not reproduce the value shown in the example.

Bond strength in an SFRM test is calculated as the load applied divided by the cap area that contacts the material. That cap area sets the stress over which the bond is tested, so choosing a specific area directly determines the reported bond strength.

The given example uses a cap area of 0.0576 square feet. Converting that to square inches gives about 8.29 in², which corresponds to a circular cap with a diameter of roughly 3.25 inches. This exact size is what the worked calculation assumes, so the resulting bond strength matches the scenario shown in the example.

If a different cap area were used, the computed bond strength would change because you’re dividing by a different area. The other area options would imply different cap sizes and would not reproduce the value shown in the example.

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