Pull-Out (Pull-off) Test
![](https://maintainability.com.sg/wp-content/uploads/2024/03/Slide2-2-1024x576.jpg)
![](https://maintainability.com.sg/wp-content/uploads/2024/03/Slide3-2-1024x576.jpg)
![](https://maintainability.com.sg/wp-content/uploads/2024/03/Picture1-7-1024x378.jpg)
Principle
![schematicdiag](http://maintainability.com.sg/wp-content/uploads/2016/06/schematicdiag.jpg)
The principle is to glue a dolly or plate onto the substrate and, once set, pull it out at a specified uniform increase in force until the dolly/plate is completely pulled off from the substrate. Observations are made on the pull-off stress, as well as the failure mode at the interface. The pull-off stress (MPa) is calculated by dividing the pull-off force (kN) by the area of the dolly/plate (mm2).
![mech](http://maintainability.com.sg/wp-content/uploads/2016/06/mech.jpg)