This paper presents the results of theoretical and experimental studies of the compressive deformation of bamboo (Bambusa Vulgaris-Schrad) in the middle section. The deformation mechanisms are elucidated via in-situ observations of deformation in specimens oriented for loading in directions that are either longitudinal or transverse. Compressive deformation is shown to result in progressive micro-buckling and kink band formation. The onset of micro-buckling is also shown to be well predicted by an Euler buckling model. The critical loads for failure in the transverse orientation are also shown to be consistent with the conditions for shear yielding in the plies with fibers that are oriented in an orthogonal direction to the loading axis.

本文介绍了竹材（Bambusa Vulgaris-Schrad）中部压缩变形的理论和实验研究结果。变形机理是通过对试样进行纵向变形或变形的原位观察来阐明的。显示出压缩变形导致渐进的微屈曲和扭结带形成。欧拉屈曲模型也很好地预测了微屈曲的发生。还显示出横向取向失效的临界载荷与纤维在垂直于载荷轴方向取向的层中的剪切屈服条件一致。