关键词: 板椒, 物理特征, 力学特性, 剪切强度, 抗拉强度

Abstract: In view of the problems of low removal efficiency and easy damage of pepper mechanized processing, the physical and mechanical characteristics of pepper are tested. In this paper, with Xinjiang Red dragon pepper as the research object, the main physical parameters and their correlation were obtained through physical characteristic parameter measurement and statistical data processing. The length of pepper was 141.00 mm, diameter of pepper was 18.35 mm, length of pepper stalk was 31.90 mm, diameter of pepper stalk was 5.97 mm, and single fruit weight of pepper was 5.64 g. With the help of shear and tensile mechanical tests, the mechanical properties of pepper stalk and the joint between pepper stalk and pepper pedicle were obtained. In the shear test, the average shear strength of the pepper stalk was 9.73 MPa, through the Design-Expert 12 software optimization design, the minimum shear strength was 6.34 MPa at the shear position, stalk diameter and loading speed were 15 mm, 4.5 mm, and 200 mm/min, respectively. In the tensile test, the average tensile strength of the pepper stalk was 5.13 MPa, through the Design-Expert 12 software optimization design, the minimum tensile strength was 3.95 MPa at the grip position, stalk diameter and loading speed were 55 mm, 4.4 mm, and 395.5 mm/min, respectively.

Key words: pepper, physical characteristics, mechanical characteristics, shear strength, tensile strength