Compression experimental results on longan fruit and pit indicated that the force-deformation curves of longan fruit compression qualified with the second order quadratic equation and the elastic modulus ranged from 0.90MPa to 0.95MPa. The force-deformation curves of longan pit compression were nearly linear and the elastic modulus was roughly 40MPa. The transversal and longitudinal stiffness of longan fruit and pit were separately similar. Under different compression rates, longan deformation of broken-hull decreased along with the increase of compression rates. The fruit skin tensile tests were conducted that stress-strain curves and the relationships between elastic modulus and strains were determined. Experimental results indicated that longan can be regarded as isotropy material.
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卿艳梅,李长友,曹玉华,张增学,程红胜.龙眼力学参数测试与分析[J].农业机械学报,2010,41(8):131-134. Analyse on Macromechanic Parameters of Longan[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(8):131-134.