Burst Test on Tissue (Ball-Burst Test)

Additionally to the tensile strength, the bursting strength according to ISO 12625 is an important characteristics of tissue materials. With a burst test the penetration of a sheet by a rigid body is simulated. 

The specimen is horizontally clamped between two plates, which have a centric circular clearance. With a constant speed, a polished ball penetrates the specimen in the center of the clearance. Measured values are the maximum force (bursting force) and the bursting index (bursting force related to the specimen´s grammage). 

The test fixture is designed for extremely simple handling. The specimen is placed on the lower platen of the fixture and the machine is then started. Specimen clamping is performed automatically and consequently the test is carried out without any influence of the operator. 

The wide force measuring range of Zwick's load cells means that, even when using a 100 N load cell, forces lower than 1 N can be measured with the required accuracy. Therefore, materials having extreme characteristics or research investigations can be carried out with high reliability. 

Even results which exceed the normal range of 5 to 20 N are precisely captured. Additionally, the force-deformation-behaviour of a material can be analysed, as a testing machine always captures the deformation values, too.