CAJ | 학술논문

使用500N微机控制材料试验机,利用压痕加载曲线,进行了用针尖压入法测定谷物籽粒硬度的试验研究,测得豌豆、蚕豆、大米、绿豆、小麦、扁豆以及玉米在不同组成部位、不同含水率时的硬度值在2～75MPa范围内.研究表明,试验加载速度在0.25～2.00mm/s范围内、针尖压入深度在0.25～1.50mm范围内时对试验结果无明显影响,而针尖锥度与籽粒硬度存在定量关系.
사용500N미궤공제재료시험궤,이용압흔가재곡선,진행료용침첨압입법측정곡물자립경도적시험연구,측득완두、잠두、대미、록두、소맥、편두이급옥미재불동조성부위、불동함수솔시적경도치재2～75MPa범위내.연구표명,시험가재속도재0.25～2.00mm/s범위내、침첨압입심도재0.25～1.50mm범위내시대시험결과무명현영향,이침첨추도여자립경도존재정량관계.
By using the 500N microcomputer control material testing machine, based on the load-depth curve, the hardness of the grains was experimentally studied adopting needlepoint pressing-in method. The peas, horsebeans, rice, mung beans, wheat, lentils as well as corn at different moisture and component parts were tested and analyzed, with the measured hardness range of 2～75MPa. The research showed that at the loading speed in 0.25～2.00mm/s and depth of indentation in 0.25～1.50mm, no obvious effect appears in the test results. The taper of needlepoint and the value of grain hardness have a quantitative relation in the measurement.