摘要
本文研究结果表明:美国电力研究院(EPRI)提出的弹塑性断裂力学分析的工程方法(即EPRI 方法)不适用于非均匀介质,为了对非均质焊接接头进行弹塑性断裂力学分析,本文对EPRI 方法进行了修正,得到了一定条件下中心裂纹模型的修正系数C_(?)、C_σ、C_v,并以此为基础研究了非均质焊接接头弹塑性断裂力学分析的工程方法。
This paper discusses the theory of how to recognize and detect a combinatorialtechnical scheme with a double-sensor instrument and two frames of the image se-quence.The rotation of rigid planer patches in three coordinate planes is described bythe pan angle(θ),the tilted angle(Φ),and the swing angle(?).And the functional rela-tions between θ,Φ,(?)and the rotation matrix R are set up.Besides some academicviewpoints are presented concerning to fully determining the transform matrix A andto fully and uniquely determining the 3-D motion-and geometric-parameters in atwinkling without any scale factor which cannot be determined,and reconstructing thespace structure of the body.And,meanwhile,some mathematical formulas derivedfrom these academic viewpoints are provided as well.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
1989年第2期101-105,116,共6页
Journal of Harbin Institute of Technology
关键词
焊接
接头
弹塑性
断裂
断裂力学
Combinatorial technical scheme
image sequence
rigid body of plane configuration.
