毛竹／杉木层积复合材弯曲与剪切破坏的微观形变过程

Bending and Shearing Failure Process of Moso bamboo-Chinese Fir Laminated Composites

利用扫描电镜在位拉伸方法(ISL-SEM),研究了毛竹/杉木层积复合材在受到外力作用下3点弯曲和剪切破坏的微观形变过程;结合扫描电镜所观测的形貌图,分析了该情况下层积材的典型破坏规律;总结了气干和水湿处理后,竹杉层积复合材剪切破坏模式以及气干条件下弯曲破坏模式。

The micro-failure process of three-point bending and shearing strength on Moso bamboo-Chinese fir laminated composites under loading was investigated by the in-situ linear-scan electron microscope method （ISL-SEM）. The typical failure regularities were analyzed in accordance with the images observed by scanning electron microscope. The breakage patterns of Moso bamboo-Chinese fir laminated composites, including shearing failure after air-dry and water soaking and bending failure under air-dry condition, were also summarized.