2002 Volume 64 Issue 5 Pages 116-122
The tensile test was applied to indicate the force for detaching a single grain of rice from the stem. A tensile tester and a experimental one with an air cylinder were used. The tensile speed of the former was 0.17mm/s, 0.33mm/s, and 0.67mm/s, and of the latter was 0.14m/s and 0.37m/s. First the stem was fixed, and then a single grain was pulled by the movable jaw. Twenty kinds of rice were tested. The results show that the behavior of detaching was not affected by the tensile speed, and was dependent on the water content of grain and stem and the kind of rice. Few kinds of rice required a higher detachment force at lower water content of grains.
