56 results about "Full field strain" patented technology

The invention relates to a method for measuring the full-field strain of an ultrahigh-temperature object based on a digital image correlation method, the temperature application range is normal temperature to 3500 DEG C, and the method comprises the following steps: selecting proper high-temperature-resistant speckle material tantalum carbide powder according to the characteristics of a measured object; polishing a to-be-measured surface of a tungsten test piece to remove an oxide layer; then mixing tantalum carbide (TaC) powder and absolute ethyl alcohol into paste according to the mass ratioof 1: 2; then, manufacturing randomly distributed speckles on the to-be-measured surface treated by the test piece by the mixture, and in order to improve the firmness and the stability of the newlymanufactured speckles, enabling the speckles to be subjected to curing treatment. In order to eliminate the interference of self-illumination of a high-temperature object on strain measurement, the invention provides a double-blue-light filter filtering method, a narrow-band filtering effect is obtained by superposing two blue-light filters, and the influence of strong self-illumination of the high-temperature object on camera imaging is greatly reduced. The method is suitable for ultra-high temperature service materials, such as full-field strain measurement of tungsten materials directly facing plasma parts and divertors in nuclear fusion engineering.