APPLICATION OF INFRARED THERMOGRAPHY FOR CONTACT PROBLEMS

摘要

Several experimental investigations of contact problems were made by the use of infrared thermography. A new experimental technique using infrared thermography combined with infrared transmitting materials was applied for continuous monitoring of the temperature distribution on the contact surface. Contact temperature measurement was examined for dry sliding contact of a plastic pin with an infrared transmitting disk. It was found that steady state contact surface temperature distribution was accurately monitored by thermography. Contact stress field was measured by an infrared stress measurement system based on the thermoelasticity through an infrared transmitting solid. It was found that the contact stress field was successfully visualized by the proposed method. Finally, a newly available infrared thermography system was used to characterize the near-surface conditions associated with fretting contact. It was found that both frictional temperature rise due to the interfacial global slip and the temperature fluctuation due to thermoelasticity can be measured to evaluate the nature of the contact stress field and the mechanics of partial slip fretting contacts.