The thermomechanical behavior of damaged space shuttle tile thermal protection system (TPS) is considered. The effects of damage on the thermal protection capability and the induced thermal stresses in the TPS are examined by comparing the thermal and structural response of the damaged configurations with the undamaged configurations. The TPS is subjected to the re-entry heating and pressure pr...

Experiments are conducted on damaged and undamaged space shuttle tile thermal protection system (TPS) to determine its thermomechnical behavior. The TPS specimens, which consists of a LI-900 tile, the strain isolator pad and the underlying structure, is subjected to a temperature profile corresponding to the thermal loading of the Access to Space (ATS) reference vehicle. Experiments are conduct...

An experimental setup is designed to detect composite delamination damage based on ultrasonic infrared thermography. The ultrasonic infrared thermography system is composed by ultrasonic excitation system, infrared thermal imager and data acquisition system and two damaged composite plate specimens are produced in the experiment. The image processing methods including thresholding, filters, edg...

Cells that have been pre-exposed to thermal stress can acquire a transient resistance against the killing effect of a subsequent thermal stress. The cause for this phenomenon, called thermotolerance, seems to be an enhanced resistance of proteins against thermal denaturation and aggregation. This resistance can be expressed as an attenuation of damage formation (less initial damage) or as a bet...

A simple measurement system is described for evaluating damage to graphite-epoxy panels, such as those used in high-performance aircraft. The system uses a heating laser and infrared imaging system to measure thermal performance. Thermal conductivity or diffusivity is a sensitive indicator of damage in materials, allowing this thermal measurement to show various degrees of damage in graphite-ep...

The aim of this prospective randomized single blind study was to determine the depth of thermal damage to tonsillar tissue due to coblation, and to compare it with thermal damage to tonsillar tissue following conventional tonsillectomy; to correlate the depth of thermal damage to tonsillar tissue with the parameters of postoperative morbidity, to compare intraoperative blood loss, postoperative...

The thermomechanical behavior of damaged space shuttle tile thermal protection system is determined using the finite element method. The relative effects of damage on the thermal protection capability and the induced thermal stresses in the TPS are determined by comparing the thermal and structural response of the damaged configurations with the undamaged configurations. The TPS, consisting of ...