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本文根据拉伸拘束度的概念,建立了拘束度测量装置,对造船业中常用的铁研型、里海型、直缝型、H 型、刚性对接(巴东)型、窗型等对接接头裂纹试样的拘束度测量表明,H 型试样拘束度系数最大,窗型试样拘束度系数最小。相同试验焊缝长度下,铁研试样拘束度系数最大。同时,在某船船体大合拢建造过程中进行了拘束度测量。结果表明,在相同试验焊缝长度下,实船与铁研及刚性对接裂纹试样的拘束度相吻合。用切割释放应力电测法测量了铁研、刚性对接试样焊缝的拘束应力。结果表明,在一定结构型式下拘束度大小是结构拘束程度的判据。在二维应力状态下,不同结构型式的试样,其拘束度与拘束应力不完全有对应关系。
In this paper, according to the concept of stretch restraint, a restraint measuring device was established to simulate the cracks in the joints such as Tieyan, Caspian, straight seam, H-type, rigid butt joint Measurement of the restraint degree of the sample shows that the restraint coefficient of the H type specimen is the largest and the restraint coefficient of the window type specimen is the smallest. Under the same experimental weld length, the coefficient of restraint of iron-based test specimens is the largest. At the same time, restraint measurements were made during the construction of a large hull of a ship. The results show that, in the same experimental weld length, the binding degree between the real ship and the iron and rigid butt-crack specimens is in agreement. The shear stress was measured by the electric stress measurement method of cutting and releasing stress. The results show that the degree of restraint in a certain structure is the criterion of structural restraint. In the two-dimensional stress state, the specimens of different structural types, the restraint and restraint stress does not fully correspond.