1results about How to "Does not affect distribution" patented technology

The application discloses a preparation method of a concrete DIC three-point notched beam fracture test specimen, and comprises the following steps: selecting a suitable mold according to the size of the test specimen required by the test, and performing pre-test treatment on the mold; pouring concrete into the mold to form the test specimen; cutting a prefabricated crack on the test specimen by using a cutting device after the test specimen reaches a specified curing test specimen; calculating the optimal speckle size of the test according to the DIC instrument parameters and the test specimen height parameters, randomly generating a speckle pattern by using software, and manufacturing a speckle transfer sticker; performing primer spraying by using a matte white self-spraying paint; and transferring the speckle pattern of the speckle transfer sticker to the surface of the test specimen. The preparation method simplifies the tedious process of filling the surface of the test specimen with gypsum and polishing; the prefabricated crack is obtained by cutting, so that the distribution of the aggregate and the admixture in the interior of the concrete during pouring is not affected, and the success rate is high; the DIC speckle is prefabricated on the test specimen by using the speckle transfer sticker, and the operation is simple and the precision is high.