The damage and cracking degree of the specimen after the Ross Flex Test is evaluated by measuring the length of the notch of the test piece. The notch is the area where the material is subjected to the most stress during the test and is prone to damage and cracking. After a specified number of test cycles, the operator will measure the length of the notch to determine the degree of damage.

The degree of damage is evaluated based on the test specimen’s zigzag resistance relative to the notch growth rate. The zigzag resistance is the material’s ability to withstand repeated bending without cracking or breaking. A higher zigzag resistance indicates a more durable material.

The notch growth rate is the rate at which the damage to the notch increases over time due to repeated bending. The rate is measured by taking multiple readings of the notch length during the test. The length of the notch is plotted against the number of test cycles to determine the growth rate.

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