马铃薯低温力学性能实验研究OA

In order to reduce mechanical damage of potato during low-temperature storage and transportation,microscopic imaging technology and low-temperature micro-force loading technology were employed to conduct tensile experiments on potato tissue under coupled mechanical and thermal loading conditions.Potato tissue samples were subjected to different stretching directions(x,y,z)and cooling rates(0.5,1.2,2 ℃/min).Statistical analysis was performed on the mechanical pa-rameters(maximum failure stress,strain,and elastic modulus)during the tensile process.Multivariate difference analysis of mechanical properties was implemented with SPSS 26 software.The results showed that both cooling rate and tensile direc-tion significantly affected the maximum failure stress of potato tissue(P<0.05).Under a cooling rate of 2 ℃/min,the maxi-mum failure stress of samples reached peak values in all tensile directions.Further analysis indicated that tensile direction significantly influenced strain(P<0.05),with the z-direction samples demonstrating optimal mechanical properties.Addi-tionally,the elastic modulus was primarily affected by cooling rate.