本报告给出了45度光弹性横向管道/容器连接件在内部压力荷载作用下的三维有限元分析结果。详细描述了有限元建模和分析。将有限元峰值应力与文献中的光弹性结果进行比较，发现最大偏差为20%，光弹性结果大于有限元结果。然而，当对泊松分布进行有限元计算时，发现偏差小于10%？s比值为0.3，而不是适用于光弹性模型材料的0.485。

Presented in this report are the results of three dimensional finite element analyses of a 45 degree photoelastic lateral pipe/vessel connection, subjected to internal pressure loading. Details of finite element modeling and analyses are described. Comparison of finite element peak stresses with photoelastic results, available in the literature, shows that the maximum deviation is twenty percent, with the photoelastic results being larger than the finite element results. However, the deviation is found to be less than 10% when the finite element calculations are carried out for a Poisson?s ratio value of 0.3 instead of 0.485 applicable to the photoelastic model material.