Test Principle Of Bursting Strength Tester

The fabric in a vertical fabric under the action of the burden of bulging, expansion of the phenomenon known as broken burst. The bursting strength of the fabric is an important mechanical index of the fabric. When the fabric is damaged, it is often accompanied by the pressure of warp, weft, oblique and so on. In particular, some knitwear (such as weft knitted fabric) have the characteristics of straight extension and transverse shrinkage, If the tensile strength test, must be warp, weft and oblique were tested, and the burst strength can be a one-time evaluation of fabric strength.
The fabric tear strength tester is also tested according to this principle. The fabric tearing tester measures the tearing force on the test sample by means of the Automatic burst strength tester until it is torn to the end mark of the specimen. Thereby recording the tear strength of each specimen in the transverse (longitudinal) direction of the fabric.
Fabric burst strength tester -Single-seam tearing process, when the sample is stretched, with the load increases, the vertical tension system by the yarn up and down, the buckling gradually disappear and tend to straighten, and in the horizontal non-tensile system yarn Slide online. Sliding the vertical and horizontal yarns at the interweaving point of the tangential sliding resistance and the longitudinal yarn gradually closer together to form a nearly triangular tear day, known as the force triangle (area).
During the sliding process, the tension on the yarn in the transverse system is increased rapidly, and the deformation of the extension is also increased abruptly. The force triangular is increasing with the stretching process, and the first transverse yarn Deformation of the largest, bear the tension is also the largest, the rest of the yarn to bear the tension from the first yarn from the increase in the distance gradually reduced. When the first transverse transverse yarn reaches the breaking elongation at break, the first load peak appears during the tearing process, and the next transverse yarn begins to become the bottom edge of the triangular force , Tear to the fracture when there is a second peak load, followed by transverse yarns inward out of the mountain root, and finally make the fabric torn.