In order to study the effects of face/core debond on load capacity of composite sandwich co‐lumns ,a series of experimental studies of the in‐plane compressive failure mechanism of foam cored sandwich columns with implanted through‐width face/core debonds is carried out .The high‐speed photography technology is used to provide a visualized insight into the failure mechanisms of compo ‐site sandwich columns .Four failure modes such as Euler buckling ,core shear buckling ,face‐sheet wrinkling and face‐sheet crushing are analyzed .Parametric studies are performed to evaluate the effect of column length ,face sheet thickness ,core thickness and debond length on the failure mode and ulti‐mate load .The observation of response of specimens during testing shows that the face sheet thickness has a direct influence on the failure mode .If the defect factor μ ≥ 0 .05 ,failure occurs with the result of buckling of the debonded face sheet followed by a rapid debond grow th towards the ends of the speci‐men .Subsequently ,extensive cracking and delamination occur in the core which lead to the core crushing and fiber compression failure .%为研究分层缺陷对复合材料夹层结构承载特性的影响，对含面芯分层缺陷的复合材料夹芯梁开展了系列轴向压缩试验，采用高速摄影仪记录结构的变形形态及破坏过程，对结构出现的欧拉屈曲、剪切屈曲、局部面板褶皱、纤维压缩破坏等失效模式进行分析，并探讨了梁长度、表层厚度、芯层厚度、缺陷尺寸等参数对结构承载特性的影响。试验结果表明：表层厚度对结构的失效模式及承载能力有着直接影响；对于贯穿型矩形缺陷，当缺陷因子μ≥0．05时，结构发生局部屈曲失效；局部屈曲为非稳态失效，当面板出现局部褶皱后，面芯分层缺陷迅速沿轴向向两端扩展，扩展路径可由面芯界面层进入芯层，造成芯层的剪切破坏。
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