论文部分内容阅读
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。
A three-point loading method was used to test the radial creep creep of the sandalwood sapwood of Cochinchina chinensis in a short time (5 h). The curves of bending creep of the sandalwood sapwood of Cochinchina chinensis were obtained. Five-element model and six- In the process of radial bending creep, the differences of Creeping sandalwood and sapwood creep properties were analyzed. The results show that the five-element model can accurately simulate the radial bending creep behavior of Dalbergia sibirica. Under the same stress level, the creep of Saccharodina rosewood is smaller than that of sapwood. With the increase of stress level, the creep of heartwood increases Not obvious, while the sapwood significantly increased.