Understanding Tensile Tester

Tensile tester is a machine that is used to measure ultimate tensile strength

, elongation and reduction in the crossectional area of the material by subjecting it to axial force. The test is carried out to know how a material will react to different type of forces in the field so that weakness are pinpointed and necessary remedial measures are taken to prevent failure in manufactured goods.

A Universal Tensile testing machine, popularly known as UTM, is widely used by laboratories to test the tensile and compressive strength of the materials. The main purpose of this tensile tester is to establish maximum stretch limit of any material, before its breaks. It is used to test strength of various materials like rubber, plastic, steel etc, which are used in manufacture of different types of goods.

The Universal tensile testing machine helps to establish the ductility of metal. This property of metal allows it to retain its original shape after the load is removed, without any alteration. Through testing one can know the range of elongation and breaking point (point-of-no-return to original shape). Tensile strength testing machine helps manufacturers of industrial raw materials, semi-finished and finished goods get right information about the elongation, elastic limit, yield strength and yield point of their materials and avert any operational failure due to undetected weakness in the material. This machine ensures satisfactory compliance to industrial safety regulations and manufacturing practices.

The UTM has two crossheads, one is adjusted to accommodate the length of the specimen and the other one is hydraucally or electromagnetically driven to produce the tensile strain on the specimen. The machine generates enough force to fracture the specimen, in quick or slow way to mimic the action of force in actual field conditions.

Tensile tester measures minute change in dimensions to show exact behavior of the material under stress. This helps to build reliable testing report so that inherent weakness in the material are accounted and taken in consideration during the manufacturing process. Besides this tensile tester helps quality control engineers to ascertain the tensile breaking point or yield point of their finished goods before they are sent into the market. There are many types models of Universal tensile testing machine available in the market; however they generally have few common points that are mentioned below:

Anti-Backlash system

Electromagnetic or Hydraulic powered movement of one crosshead

Emergency stop through rocker, mechanical switch or computer

Crosshead guidance system

Quick disconnect load cell and fixture system

There are many suppliers of tensile testing machine in market and price of the tensile testers varies according to the technical features offered, models and the functionalities. It is in best interest of the user to thoroughly analyze the different models, their price and ascertain that how a said machine can benefit them in optimum manner.

by: Atcomaart

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