Page 14 - วิจัยการใช้ประโยชน์ไม้สะเดา

Table 1. The mechanical properties of Azadirachta indica A. Juss.

conditions conditions

type of properties (in SI units) (in metric units)

SI units wet air dry metric units wet air dry

2
modulus of rupture (MOR) MPa 98.6 116 kg/cm 1,005 1,186
2
stress at proportional limit MPa 59.2 75.8 kg/cm 594 773
2
modulus of elasticity (MOE) MPa 10,300 11,100 kg/cm 105,200 113,000
2
shearing (radial) MPa 14.3 17.6 kg/cm 146 180
2
shearing (tangential) MPa 16.4 21.1 kg/cm 167 215
2
compression // grains MPa 41.1 50.2 kg/cm 419 512
2
compression_l_grains (radial) MPa 14.7 23.1 kg/cm 149 235
2
compression_l_grains(tangential) MPa 17.9 26.5 kg/cm 183 270
2
tension MPa 93.9 155 kg/cm 957 1,581

impact bending kg-m 4.33 2.91 kg-m 4.33 2.91
hardness (radial) N 5,261 5,670 Kg 516 556

hardness (tangential) N 4,927 6,459 Kg 483 633

9