紧凑拉伸和双悬臂梁试样应用极广,他们的几何构形特点相同,一般将H/W比较小者称为双悬臂梁试样。Srawley等和范天佑曾先后用边界配置法得到了若干H/W比下的K_I数值解。但在工程应用和研究中H/W比变化范围更大,因此不少作者曾试图以悬臂梁理论、弹性基础上的连续梁理论导出K_I的解析表达式。但因理论上的局限,这类表达式应用范 Compact tensile and double cantilever beams are used in a wide range of applications. Their geometrical features are the same. Generally, a specimen with a small H / W is called a double cantilever beam. Srawley et al. And Fan Tianyou have successively obtained K-I numerical solutions at several H / W ratios using the boundary configuration method. However, the H / W ratio in engineering applications and research is more varied. Therefore, many authors have tried to derive the analytic expression of K_I based on the cantilever theory and the continuous beam theory based on elasticity. However, due to theoretical limitations, this type of expression is applied