Tensile tests can be conducted on a wide variety of tensile testing machines.
Below are photos of three different tensile testing machines.
The capacity of these machines can range from a few kilonewtons (kN) force to 100 000kN (the world’s largest test machine). The machine used to test steel for the Sydney Harbour Bridge had a capacity of 1270 kN.
A prepared specimen, usually of standardised size, is held in a gripping device and a gradually increasing axial load is applied. The load is usually applied until failure occurs.
The applied load (kN) is plotted against extension (mm), to produce a load/extension graph. Below are three examples of load/extension graphs produced by different materials.
What other materials testing equipment is used in industry?
Visit the websites of some testing equipment makers and create a mini catalogue of the key types of testing machines.
Be sure to include an image of the machine and a description of what tests the machine can perform.
Use the top navigation menu or ‘next’ button in the bottom right corner to have a look at each of these tensile testing machines in more detail.