Document Type


Date of Award


Degree Name

Master of Science in Mechanical Engineering - (M.S.)


Mechanical and Industrial Engineering

First Advisor

Benedict C. Sun

Second Advisor

Bernard Koplik

Third Advisor

Harry Herman

Fourth Advisor

James Miller

Fifth Advisor

Rong-Yaw Chen


This thesis presents an analysis using the finite element method of the local stress at the nozzle and pipe connection subjected to a radial loading.

In this study, the local stress factor (for membrane and bending stresses) is presented in a series of plots with beta (nozzle radius/pipe radius) values ranging from 0.1 to 1.0 and gamma (pipe radius/wall thickness) values ranging from 10 to 100. The membrane and bending stresses in longitudinal and circumferential directions of the run pipe are computed as a function of the dimensionless parameters, beta and gamma.

For a given external radial loading with different nozzle and pipe wall thickness, the different bending moment and membrane stresses produced are obtained for the range of parameter values gamma and beta mentioned above. The values of beta, wall thickness and location have a significant effect on the values of the stresses. The more the ratio of nozzle wall thickness to vessel wall thickness varies from unity, the greater the stresses . The stresses decrease as beta increases.



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