抄録
The propagation of thermal stress in sheet glass during single pulsed laser irradiation was clarified using a one-dimensional model. A thermoelastic equation based on an equation of motion was applied. In the case of a 0.1 μs pulse width, a thermal stress cycle of propagation, reflection, propagation, interference, and separation was revealed. Upon the reflection of stress wave at the free ends, the polarity of the stress change. Alternating stresses of approximately 0.5 MHz appeared inside the sheet glass. Because a crack may propagate in the glass as a result of the stress, there is a possibility of high-cycle fatigue. It was found that the thermal stress generated by single pulsed laser irradiation exhibited wavelike properties.
