Mechanical Properties of Apple Picking Damage

In order to reduce apple damage of extrusion and collision caused by machine during apple picking，mechanical damage law of apple was studied.A compressive test was carried out on precision micro controlled electronic universal testing machine with red Fuji apple at mature state as test material.Through analyzing mechanical characteristics of apple compression，mechanical model was established.By calculating，compressive elastic modulus of apple was 2.091MPa，maximum elastic limit was 0.130 MPa;and when apple was compressed，elastic modulus of compression remained at the scope of 5~7 MPa.When stress value of apple reached its yield limit 0.125 MPa，deformation of apple was accelerated.This study can be used to make a reasonable prediction of mechanical damage of apple.