Measurement of mechanical properties of carp scales based on digital image correlation method

As a kind of high quality natural material, the structure and mechanical properties of fish scale have been widely concerned. At present, there are few researches on fish scales in China, and most of them focus on the composition and nutritional value of fish scales, while there are few researches on their mechanical properties and microstructure. In this paper, based on the digital image correlation method and a set of self-built strain measurement system, the tensile strain of fish scale specimens was measured, and the fish scale specimens after surface speckle treatment were tensile tested and data were collected. The mechanical properties of fish scales in the uniaxial drawing process were studied and analyzed, and the microscopic images showed that the tensile strength of fish scales was related to the number of collagen fiber layers in their inner layers.