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Tang F.,Nanjing University of Finance and Economics | Huang Z.,Nanjing University of Finance and Economics | Huang Z.,National Engineering Laboratory for Grains Storage and Transportation | Yan X.,Nanjing University of Finance and Economics | And 3 more authors.
Journal of the Chinese Cereals and Oils Association | Year: 2013

In this paper, soybeans were stored in two LHT-1 type meter of modulus of resilience of grain. Force of 150 kPa and 300 kPa acted on the tops of two meter of modulus of resilience of grain respectively. The pressure (87, 115, 150, 161, 211 and 300 kPa) at different locations of the cylinder of the meter of modulus of resilience of grain were calculated by theoretical. The soybean samples storing for 6 months under the different pressure were tested with texture analyzer. The data was analyzed and processed by SPASS software. The experimental had shown that: the maximum compressive force to damage soybean (76.77~101.51 N), the maximum compressive energy to damage soybean (68.28~84.12 mJ) and apparent contact elastic modulus (131.99~200.29 MPa) decreased with the increase of storage pressure of soybean. Source


Cheng X.,Nanjing University of Finance and Economics | Cheng X.,National Engineering Laboratory for Grains Storage and Transportation | Yan X.,Nanjing University of Finance and Economics | Yan X.,National Engineering Laboratory for Grains Storage and Transportation | And 2 more authors.
Journal of the Chinese Cereals and Oils Association | Year: 2014

In this paper, soybeans were respectively stored in 60, 90, 120 and 150 days under the temperature of 20, 25 and 30°C with the moisture content of 12.0%, 13.5% and 15.0% wb. The maximum compressive force, compressive energy and compressive strain to damage soybean, the maximum under different storage temperatures, moisture contents and storage time were measured by the Brookfield Texture Analyzer. The experimental results show when storage time is 60 days, storage temperature range from 20 to 30°C and moisture range from 12.0 to 15.0% w.b, the maximum compressive force, compressive energy and compressive strain to damage soybean respectively are 106.85~90.19 N, 160.80~108.92 mJ and 0.356~0.412; when storage time is 150 days, storage temperature range is from 20 to 30°C, moisture range from 12.0 to 15.0% w.b; the maximum compressive force, compressive energy and compressive strain to damage soybean respectively are 99.19~81.50 N, 113.01~90.52 mJ and 0.439~0.472. It was observed that the maximum compressive force and energy to damage soybean will decrease with increasing moisture content, but the maximum compressive strain to damage soybean increases with the increase of moisture content in the same storage temperature and time; in the same storage condition of moisture content and time, the maximum compressive force and energy to damage soybean will decrease with increasing storage temperature, however, the maximum compressive strain to damage soybean increased with the increase of storage temperature; besides, in the same storage condition of temperature and moisture content, the maximum compressive force and the maximum compressive energy to damage soybean decreased with increasing storage time, yet the maximum compressive strain to damage soybean increased with the storage time increasing. Source


Yan X.,Nanjing University of Finance and Economics | Yan X.,National Engineering Laboratory for Grains Storage and Transportation | Cheng X.,Nanjing University of Finance and Economics | Cheng X.,National Engineering Laboratory for Grains Storage and Transportation | And 2 more authors.
Journal of the Chinese Cereals and Oils Association | Year: 2015

In the paper, the paddy grains Nanjing 5055 had been stored in six LHT-1 rebound modulus testers for 2 months under top pressures of 50, 100, 150, 200, 250 and 300 kPa respectively. An experimental study was established to determine the compressional properties of paddy grains by Brookfield Texture Analyzer. The paddy grains for test were chosen from the top and bottom of the silo. The results showed that along with the storage pressure increasing from 0 to 300 kPa, the rupture force of paddy grains was decreased from 81.58 to 73.78 N, the rupture energy from 8.10 to 6.27 MJ, the rupture strain from 0.1392 to 0.1168, the apparent contact modulus of elasticity from 171.32 to 57.68 MPa and the maximum contact stress from 40.84 to 19.11 MPa. All of the compressional properties of the paddy grains expressed a negative linear relationship with storage pressure. © 2015, Editorial Department, Chinese Cereals and Oils Association. All right reserved. Source


Cheng X.,Nanjing University of Finance and Economics | Cheng X.,National Engineering Laboratory for Grains Storage and Transportation | Yan X.,Nanjing University of Finance and Economics | Yan X.,National Engineering Laboratory for Grains Storage and Transportation | And 2 more authors.
Journal of the Chinese Cereals and Oils Association | Year: 2014

In the paper, the compressive density and bulk strain modulus of paddy pile have been measured by strain-controlled triaxial apparatus. The effect of confining pressure on compressive density of paddy pile, also the effect of confining pressure and moisture content on bulk strain modulus have been analyzed and discussed. The results showed that when in the same moisture contents (11.50%, 13.14%, 14.47%, 15.86% and 17.37%), the confining pressure increased from 23 to 188 kPa; the compressive density of paddy pile increased from 0.664 6 to 1.067 9 g/cm3, 0.670 8 to 1.081 5 g/cm3, 0.67 81 to 1.084 2 g/cm3, 0.681 4 to 1.142 3 g/cm3 and 0.686 1 to 1.168 8 g/cm3 respectively; the bulk strain modulus of paddy pile increased from 311.52 to 495.06 kPa, 294.73 to 487.80 kPa, 291.61 to 450.05 kPa, 210.34 to 430.04 kPa and 160.16 to 301.07 kPa respectively; when in the same confining pressure, bulk strain modulus of paddy pile decreased along with the moisture content from 11.5% to 17.37%, which fitted a regression equation: k=-aW2+bW-c, where W is the moisture content; k is the bulk strain modulus and a, b, c will vary in linw with the confining pressure. Source


Cheng X.,Nanjing University of Finance and Economics | Cheng X.,National Engineering Laboratory for Grains Storage and Transportation | Huang Z.,Nanjing University of Finance and Economics | Huang Z.,National Engineering Laboratory for Grains Storage and Transportation | And 4 more authors.
Journal of the Chinese Cereals and Oils Association | Year: 2013

According to the American Society of Agricultural and Biological Engineers ASAE S368.4 DEC2000 (R2006) standard, the apparent elastic modulus, the biggest destructive force, the biggest destructive energy and the deformation of the Heilongjiangs soybean (produced in 2011) are measured with Brookfield texture analyzer. The compressive velocities (0.02 mm/s, 0.10 mm/s, 0.50 mm/s and 1.00 mm/s) are selected to compress the soybeans in direction of long axis (X), middle axis (Y) and short axis (Z). The relation curves of load and the deformationare made with texture analyzer software. The apparent elastic modulus, the biggest destructive force, the biggest destructive energy and the deformation are obtained by the Spass software. The experimental results show that the biggest destructive force, the biggest destructive energy and the deformation increase with the increase of the compressive velocity in compressing direction of long axis (X), middle axis (Y) and short axis (Z), but the apparent elastic modulus decreases with the increase of the compressive velocity. Source

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