dear dir,

i have a promlem . why bend stress in same node but in different element appear in stress report is different?


regard,

llljq

The (Element) Stress Report is just that, a report for the elements in the model. Therefore, each element has its own (report) data, for each of its two end nodes.

So, in a model with nodes 100--110--120--130--140 (etc) you have elements:

100--110
110--120
120--130
130--140 (etc)

So in the Stress Report (and the Force Report) you have this:

100 -> data.... (which is the data for node 100 on element 100-110)
110 -> data.... (which is the data for node 110 on element 100-110)

110 -> data.... (which is the data for node 110 on element 110-120)
120 -> data.... (which is the data for node 120 on element 110-120)

120 -> data.... (which is the data for node 120 on element 120-130)
130 -> data.... (which is the data for node 130 on element 120-130)

130 -> data.... (which is the data for node 130 on element 130-140)
140 -> data.... (which is the data for node 140 on element 130-140)

The nodes will appear on each element to which the are connected/associated. For a "tee node", the node will appear on 3 elements in the Force and Stress reports. The forces and stresses can be different depending on what is happening with the element.

HI Richard Ay

for example :10-18-19-20-25-27,the element 10-18 and 20-25-27 are straight pipe ,but the element 18-19-20 is bend;
1、between the element 10-18 and the element 18-19,the absolute value of the force or moment is equal for the node 18,but the absolute value of the bending stress is not equal for the node 18?what's the reason?

2、between the element 20-25 and the element 25-27,the absolute value of the force or moment is equal for the node 25,but the absolute value of the bending stress is also equal for the node 25?what's the reason?

regards
zzw

1) My first thought is the SIF.

2) If the forces and moments are equal, and the cross section remains the same, and there are no other "Code factors" (like SIFs), then I would expect the bending stress to be the same.

thans lot ,just you say that the main reason is the SIF

regards
zzw