3.3.1.3 Tensile to Break Step During a break test, the sample is pulled until the measured load drops by a % from the maximum load after a minimum load setpoint is achieved. This indicates a break event. When you configure a break test, you specify the Break %. This is the percentage drop in load from a measured maximum load. For example, if the measured peak load is 100 lbf, and the Break % = 20%, the break load = 80 lbf. The Minimum Break is the measured load that must first be achieved before the system starts looking for the break event. The minimum break protects against false break events in samples that exhibit significant load changes when under stress, e.g. peel tests. • Select the Tension symbol • Select the Tension Break symbol • Enter your Break % (percentage drop from the peak load) • Enter the Minimum Break value • Enter the Test Speed
NOTE All break tests use the % Drop algorithm to define a sample break for the purposes of completing a test setup. A Rate algorithm is available to determine a break measurement using the Graphic Analysis tools.
These are the Exceptions for this step. An exception is an event. An exception stops the test. Exceptions are optional, but are recommended. Distance Limit - If the crosshead moves this distance and the Load Limit has not be achieved, the test will stop. Load Limit - If the crosshead moves and the measured load equals this limit, the crosshead will stop.
Enter the load (Min Break) which is the starting load- where the search for a drop in load shall begin.
Enter % drop in load value. Measured from the maximum load achieved.
Enter the Speed. This is the velocity the crosshead will move at to the Limit.
When Collect Data = Yes, the individual data points for this test step are acquired and saved for exporting. When Collect Data = No, no data points are collected or saved. The step is just a “goto” without any data collected.
L2 Plus Test Builder - Tensile Break Limit Moves the crosshead until a Break is achieved
L2 Plus Test Builder - Tensile Step types
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