Universal Material Tensile testing machine can test the tensile strength and elongation , it is according to extensometer (large deformation) device or machine stroke to measure. No matter what the elongation of the material are measured, can be measured by the following methods to achieve, DOMGGUAN RIGHT TESTING MACHINE to talk about the measurement of plastic elongation method.

The first test menthod with a extensometer (large deformation) of the tensile machine: Use grips clamp specimen. And then through the extensometer (large deformation ) measuring device measure between the two points of the absolute elongation and elongation at break.

1.If it is the reference GBTGBT 1040.2-2006 Determination of tensile properties of plastic testing of plastic, the sample should be made of dumbbell-shaped, the specific size and thickness, GB.T 17037.3-2003 plastic thermoplastic injection molding sample preparation has a detailed description, omitted here.

2.Dumbbell shape sample to be done such elongation method is relatively simple, use the large deformation extensometer with equipment is enough. As long as the equipment has  a large deformation extensometer , can do such tests. RT-204B universal material tensile testing machine, made a large deformation extensometer of the instrument can fully meet.

The second method is use universal material tensile testing equipment grips clamp sample, the distance between the upper and lower fixture as gauge elongation, to measuring the elongation at break.

1.If reference to ISO 1184 norm test , specimens shall be rectangular. In doing rectangular strip specimen to tensile, the test method of elongation should use the machine stroke displacement method, that is, the distance between the upper and lower fixture for the gauge length.

2.The machine stroke displacement method has higher requirements to the equipment, the general open-loop control of the machine can not be done a very good completion of the test. RT-204B computer servo universal material tensile testing machine use servo motor control, you can accurately measure the machine stroke and displacement . Rectangular strip sample preparation standards with reference to various national standards.

This method is not as precise as the first extensometer large deformation device to measure the two points elongation. As we all know, the fixture will have a certain extension when clamp the sample, it will produce errors.