3.4.8 Break Coefficient The Break tool features two methods for identifying a material break: %Drop and Rate. Break testing identifies when the material fractures or ruptures and provides a curve that can be used to identify the maximum stress, strain, load or distance prior to the break event.
3.4.8.1 Break %Drop Coefficient The Drop % algorithm is the more commonly used method for deter- mining a sample break. This method first looks for the maximum stress or load. Once the maximum load is determined, the algorithm next looks for a % drop in load. So, if the maximum load was measured as 100N, and the load dropped to 80N, that is a 20% drop in load. The % Drop method is used in the L3 test setup steps for both tensile and compressive limits. This terminates or completes a test run when the maximum load is measured and the load drops be the specified percent value.
Both forms for break identification may be used in either tensile or compressive directions.
Drop % Break
Rate Change Break
25%
The max marker is used to find the break point at a Drop % = 25.
L3 Break Test Using %Drop method for determining the break load
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