交趾黄檀心边材径向弯曲蠕变性能  

Study on the Radial Flexural Creep Performance of Dalbergia cochinchinensis' s Heartwood and Sapwood

作　　者：朱益萍[1] 陈奶荣[1] 饶久平[1] 曾钦志[1] 

机构地区：[1]福建农林大学材料工程学院,福建福州350002

出　　处：《福建林业科技》2016年第2期112-116,共5页Journal of Fujian Forestry Science and Technology

基　　金：福建省科技厅高校产学合作项目(2015H6002)

摘　　要：采用三点加载方式对交趾黄檀心边材试件进行短时间(5 h)内径向弯曲蠕变测试,获得交趾黄檀心边材的弯曲蠕变特性曲线,分别用五单元模型、六单元模型模拟交趾黄檀径向弯曲蠕变过程,对比分析交趾黄檀心材与边材蠕变性能的差异。结果表明:五单元模型可准确地模拟交趾黄檀的径向弯曲蠕变特性;相同应力水平下交趾黄檀心材的蠕变小于边材的蠕变,随应力水平提高,心材的蠕变增大不明显,而边材蠕变明显增大。After the radial flexural creep tests of Dalbergia cochinchinensis＇s heartwood or sapwood specimens were conducted by loading on 3-point for a short time （5 hours）, the flexural creep curves were measured. And then the flexural creep curves were fitted with a five-element or six-element viscoelastic model respectively, and the difference of the creep performance between heartwood and sapwood were analyzed finally. The results show as following：the five-element viscoelastic model could well describes the radial flexural creep behaviors of Dalbergia cochinchinensis wood ;and the creep compliance of the heartwood is less than the sapwood＇s under the same stress level;when the stress is raised,the creep compliance of heartwood increases a little, but the creep compliance of sapwood increases obviously.

关 键 词：交趾黄檀 心材 边材 蠕变 粘弹性模型 

分 类 号：S781.2[农业科学—木材科学与技术] S792.28[农业科学—林学]