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Bess MTI provides materials tensile testing facilities to its customers. Tensile tests are simple, relatively inexpensive, fully standardized, and provide invaluable information regarding materials selection to withstand applied loads in service.
These tests measure the force required to break a test specimen and the extent to which the specimen elongates to its breaking point. They consist of mounting and pulling test specimens on an extensometer. Stress-strain diagram are obtained by plotting the applied forces as a function of elongation.
For most materials, the relationship between applied load and elongation is linear in the elastic zone of the material. In this linear region, the material obeys Hooke's Law, according to the equation:
where E is the Elasticity (or Young’s) Modulus, given by the slope of the stress (σ)-strain (ε) curve.
Beyond the elastic zone, the material reacts plastically to any further increase in stress. It will not return to its original, unstressed status, and permanent plastic deformation occurs. The Ultimate Tensile Strength is reached when the specimen sustains its maximum load during the test.
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