Frictional heating model for efficient use of vibrothermography

Vibration characteristics measurement of beam-like structures using infrared thermography

“…7) was observed. Moreover, Mabrouki et al [8] observed similar findings on investigation of the frictional heating model for efficient use of vibrothermography. Hence, the conclusion was that frictional heat increases with the interface frequency.…”

“…Finally, recorded the friction interface pre-load and dynamic force through channel 5 via a load cell (HMB) with a rated sensitivity of 20 ⁄ . Furthermore, the problem of low thermal emissivity of the beams surfaces was eliminated by applying black paint which is consistent with standard practice [8].…”

“…The choice based on the ability to generate heat with slight frictional effect. Typically, they have low thermal conductivity [8]. The geometric and material properties are given in Table 1 and Table 2, respectively.…”

“…(8) The friction power input is the product of the frictional force and the sliding speed . Mabrouki et al [8] reported that frictional energy consumed or stored in the material as micro-structural changes such as dislocations and phase transformation in general is about 5 . The remaining part of the frictional energy raises the interface temperature.…”

“…Recent studies have shown that defect heating in cracked metallic structure is primarily generated by frictional rubbing on crack faces [7]. Mabrouki et al [8] investigated the vibrothermography for detection of fatigue cracks in steel compact tension specimen. Lahiri et al [9] proposed the active IRT based technique for detecting defects in ferromagnetic specimens using low frequency alternating magnetic field induced heating.…”