3.4.8.2 Break Rate Coefficient The Break Rate algorithm looks at the slope along the stress-strain curve to determine the break point. Using a user-defined break rate, the algorithm first finds the maximum load point. After this point, the algorithm looks for the first occurrence where the break rate appears and marks that point as the break point. The Break Rate is determined as the change in load divided by the change in distance. So, if the Break Rate is 25, the break result is the point in the data stream where the load rate changed at a rate of 25N/ mm. The Leg Length is used to help counter any noise issues along the graph trace. A Leg Length of 31 uses one point along the slope created by the Break Rate point and then 15 points on either side to create a slope line.
25N/mm
The break rate looks for a change in load (drop rate)
along a negative slope line after the maximum load is achieved first.
The leg length is used to define the data seg- ment that locates the drop in load rate.
L3 Break Result Shows Break point using Break Rate algorithm
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