喷瓷管道热喷瓷层应力状态分析

计算分析了喷瓷管道热喷瓷层的应力状态。计算结果表明 ,由于瓷层与金属基体热膨胀系数存在差异 ,瓷层处于压应力状态 ,金属基体处于拉应力状态 ;瓷层所处几何位置不同 ,其中的应力也存在差异。管道内瓷层的受力状态好于管道外瓷层。随着管道半径的增大 ,径向应力绝对值减小 ,瓷层所受的压应力也减小。由于管道内瓷层的半径小于外瓷层的半径 ,因而内瓷层所受的压应力大于外瓷层的压应力

Analysis on stress state of pipe sprayed with a coating of porcelain

Because the expanding coefficients of the base metal and pipe coating are different, the stress of the porcelain coating sprayed on the pipe is different from that of the base metal. The coating is of a compressive stress and the base metal is of a tensive stress. The location of the coating is also related to the stress. The inner coating stress of pipeline is less than the outer coating stress. As the radium of pipe increases, the absolute value of the radial stress decreases, and the compressive stress on the coating is reduced as well. The compressive stress of inner wall of pipe is bigger than that of outers.