火炬松木材剪切弹性模量的测试研究

DETERMINATION OF LOBLOLLY'S SHEAR MODULUS

摘要: 研究采用变跨距的三点弯曲方法测试10年生火炬松木材17号家系和50号家系的剪切弹性模量GLT, GLR值；用45o偏轴压缩法测量GRT值. 测试结果表明，速生材火炬松的剪切弹性模量GLT, GLR,GRT都不高，在70~180MPa之间，其中GRT最小；另外，整体上火炬松17家系的抗剪切性能优于50号家系.

Abstract: In this paper, the ten-year-old loblolly's shear moduli,GLT,GLR, were tested by the variable span method in thethree point bending experiment, while GRT was measured by acompressing test with 45o bias-axis. The results show that theshear moduli (GLT,GLR,GRT) ranged from 70MPa to180MPa.GRT is the lowest among the three shear moduli. Theanti-shear capability of the 17th clone is greater than that of the50th clone.