With the increase of the utilization of bamboo, we must find out more in bamboo properties. According to the national standard GB/T15780 -1995, this paper analyzed the air-dried density and mechanical properties of Mo...With the increase of the utilization of bamboo, we must find out more in bamboo properties. According to the national standard GB/T15780 -1995, this paper analyzed the air-dried density and mechanical properties of Moso bamboo in different ages and stalk parts. The results showed that both the age and the stalk part have remarkable effects on air-dried density and mechanical properties. The effect of age is much more prominent than that of stalk part. The performance shows: upper > middle > down, which increases with the age, and reaches to the peak values at the age of 4 and show a downward trend at the age of 6. According to the tests, the optimum age of bamboo for cutting is about at 4. Moreover, there is a positive correlation between air-dried density and mechanical properties. The correlation coefficients between air-dried density and crushing strength parallel to the grain, bending strength, modulus of elasticity and tensile strength parallel to the grain are 0.917 3, 0.783 9, 0.745 8 and 0.507 4, respectively. In addition, there is a good relativity among mechanical properties, δt: δc: MOR: MOE = 2.79: 1.00: 2.40: 0.15.展开更多
In order to further research bamboo cultivation and expand its application field, air-dried density and mechanical properties of Moso bamboo from the 2 plantations under the same site condition were measured and analy...In order to further research bamboo cultivation and expand its application field, air-dried density and mechanical properties of Moso bamboo from the 2 plantations under the same site condition were measured and analyzed by using the national standard The Testing Methods for Physical and Mechanical Properties of Bamboo (GB / T 15780-1995). And the single linear regression analysis was carried out. The results showed that air-dried density and mechanical properties of the 2 kinds of Moso bamboo increase with the age increasing, and at the same age, those of Moso bamboo from the seedling plantation are much higher than those from the common plantation afforested by transplanting, in other words, Moso bamboo from the conventional plantation reaches a stabilization the at age of 4, while that from the seedling plantation reaches a stabilization at the age of 6 or more. There is a positive correlation between air-dried density and mechanical properties of the 2 kinds of bamboo.展开更多
Bamboo as an important biological resource has become an alternative to wood gradually,but the variation in mechanical properties leads to difficulty in its use to some extent.So deep understanding of the nature in ba...Bamboo as an important biological resource has become an alternative to wood gradually,but the variation in mechanical properties leads to difficulty in its use to some extent.So deep understanding of the nature in bamboo is needed to satisfy the utilization effectively.As we have known,the density is one of mechanical properties of bamboo.Therefore,this paper studied the variation in bamboo density with the weighing method.The results showed that the density decreases gradually from the outer to the inn...展开更多
基金supported by The 11th Five-Year Plan: The Project of National Science and Technology Supporting (NO.2006BAD19B0402)
文摘With the increase of the utilization of bamboo, we must find out more in bamboo properties. According to the national standard GB/T15780 -1995, this paper analyzed the air-dried density and mechanical properties of Moso bamboo in different ages and stalk parts. The results showed that both the age and the stalk part have remarkable effects on air-dried density and mechanical properties. The effect of age is much more prominent than that of stalk part. The performance shows: upper > middle > down, which increases with the age, and reaches to the peak values at the age of 4 and show a downward trend at the age of 6. According to the tests, the optimum age of bamboo for cutting is about at 4. Moreover, there is a positive correlation between air-dried density and mechanical properties. The correlation coefficients between air-dried density and crushing strength parallel to the grain, bending strength, modulus of elasticity and tensile strength parallel to the grain are 0.917 3, 0.783 9, 0.745 8 and 0.507 4, respectively. In addition, there is a good relativity among mechanical properties, δt: δc: MOR: MOE = 2.79: 1.00: 2.40: 0.15.
文摘In order to further research bamboo cultivation and expand its application field, air-dried density and mechanical properties of Moso bamboo from the 2 plantations under the same site condition were measured and analyzed by using the national standard The Testing Methods for Physical and Mechanical Properties of Bamboo (GB / T 15780-1995). And the single linear regression analysis was carried out. The results showed that air-dried density and mechanical properties of the 2 kinds of Moso bamboo increase with the age increasing, and at the same age, those of Moso bamboo from the seedling plantation are much higher than those from the common plantation afforested by transplanting, in other words, Moso bamboo from the conventional plantation reaches a stabilization the at age of 4, while that from the seedling plantation reaches a stabilization at the age of 6 or more. There is a positive correlation between air-dried density and mechanical properties of the 2 kinds of bamboo.
基金supported by The 11th Five-year Plan "The Project of National Science and Technology Supporting(2006BAD19B0402)"
文摘Bamboo as an important biological resource has become an alternative to wood gradually,but the variation in mechanical properties leads to difficulty in its use to some extent.So deep understanding of the nature in bamboo is needed to satisfy the utilization effectively.As we have known,the density is one of mechanical properties of bamboo.Therefore,this paper studied the variation in bamboo density with the weighing method.The results showed that the density decreases gradually from the outer to the inn...
