Dehnungsmessern

Dehnungsmessern, often translated as strain gauges, are sensor devices used to measure mechanical strain on an object. Strain is the deformation of an object in response to applied forces. A common type of dehnungsmessern is a resistive strain gauge, which consists of a thin metallic foil or wire arranged in a grid pattern. When the object to which the dehnungsmessern is attached is strained, the grid also deforms. This deformation changes the electrical resistance of the foil or wire.

The principle of operation relies on the piezoresistive effect, where the electrical resistivity of a material changes with applied mechanical strain. The change in resistance is directly proportional to the strain. By measuring the change in resistance, the strain on the object can be calculated. Dehnungsmessern are typically applied to the surface of the object using a strong adhesive. They are often used in conjunction with a Wheatstone bridge circuit to accurately measure the small changes in resistance and compensate for temperature variations.

Dehnungsmessern find wide applications in various fields, including engineering, research, and manufacturing. They are crucial for stress analysis in structures like bridges, aircraft, and automotive components. They are also used in the development of load cells, pressure sensors, and accelerometers, enabling the measurement of forces, pressures, and accelerations indirectly through strain. The sensitivity of a dehnungsmessern is quantified by its gauge factor, which relates the change in resistance to the applied strain.