Fatigue Testing Machine Diagram

Fatigue tests are used on a range components from coupons through to full size test.

Fatigue testing machine diagram.

These tests are used either to generate fatigue life and crack growth data identify critical locations or demonstrate the safety of a structure that may be susceptible to fatigue. He designed the machine to test railroad car axles and investigate axle brake failures. With the varying load to which most machines are exposed it is not the static break point but the fatigue limit which decides when a fracture occurs. Electrodynamic testing machines are used to determine the durability of materials and components in the finite life fatigue and high cycle fatigue ranges.

Fatigue testing is a specialised form of mechanical testing that is performed by applying cyclic loading to a coupon or structure. Materials fatigue performance is commonly characterized by an s n curve also known as a wöhler curve this is often plotted with the cyclic stress s against the cycles to failure n on a logarithmic scale s n curves are derived from tests on samples of the material to be characterized often called coupons or specimens where a regular sinusoidal stress is applied by a testing machine. Rotating beam fatigue testing systems were first developed in the mid 1800s by a german railroad engineer named august wöhler. Fatigue strength is thus of very great significance in machine design.

Balaji fatigue testing machine capacity 200 kgcmthe machine is designed determining the fatigue properties of metals and alloys reverse bending cantilever type machine where the specimen is subjected to rotation at 2800 rpm with both ends held firmly between the gripping chucks with weights suspended through a lever.