基于图像分割的复合材料I型层间断裂裂纹识别研究  

Mode I Interlaminar Fracture Crack Identification of Composite Materials Based on Image Segmentation

作　　者：伊泽元 吴震宇[1] 

机构地区：[1]浙江理工大学机械工程学院,浙江 杭州

出　　处：《建模与仿真》2023年第3期2252-2260,共9页Modeling and Simulation

摘　　要：为了研究复合材料的层间抗拉性能,一般通过双悬臂梁试验测量复合材料I型层间断裂韧性,它是复合材料分层扩展及失效机制研究的一个重要参数。在DCB试验过程中通常需要暂停试验去多次测量裂纹长度,这会影响实际断裂裂纹的传播,导致裂纹测量误差。为了提高复合材料I型断裂韧性试验中的测量效率,提出一种基于图像分割的复合材料I型层间断裂裂纹识别方法。该方法使用图像分割模型检测裂纹,能够实时测量I型断裂裂纹的长度。与实际裂纹长度对比,测量平均误差不超过2.9%,证明了本方法的准确和高效。In order to study the interlaminar tensile properties of composite materials, the mode I interlami-nar fracture toughness of composite materials is generally measured by double cantilever beam test, which is an important parameter for the study of delamination propagation and failure mech-anism of composite materials. In the DCB test process, it is usually necessary to pause the test to measure the crack length for many times, which will affect the propagation of the actual fracture crack and cause the crack measurement error. In order to improve the measurement efficiency in the mode I fracture toughness test of composite materials, a method for identifying the mode I in-terlaminar fracture crack of composite materials based on image segmentation is proposed. This method uses image segmentation model to detect cracks and can measure the length of mode I fracture crack in real time. Compared with the actual crack length, the average error of measure-ment is not more than 2.9%, which proves the accuracy and efficiency of this method.

关 键 词：双悬臂梁试验 层间断裂 复合材料分层 图像分割 裂纹长度 裂纹识别 韧性试验 失效机制 

分 类 号：TB3[一般工业技术—材料科学与工程]