# Load and Stress; 3 angles with different shapes corners

In summary, the conversation discusses the strength of different angled structures. The three angles are mounted in the ground and made of the same material, with the same force acting on all of them. The strongest angle is debated, with some factors being considered such as surface area, concave notches, and material and fabrication process. The conversation also questions if this was for schoolwork and why the original diagram was not included.

Post moved from the technical forums to the Schoolwork forums
Summary: Each angle has a different type of corner, rectangular, circular, and triangular. Which one is the strongest?

All three angles are mounted in the ground and made of the same material. The same force ‘w’ towards the ground is acting on all angles, which one is the strongest?
Please explain why it is the strongest, I believe it is the circular one but can’t give a reason other than it has the most surface area to support the ‘w’.

Welcome!
The triangular one could also have "the most surface area to support the ‘w’."
What have you studied about the subject?

The same force ‘w’ towards the ground is acting on all angles, which one is the strongest?
Normally I would say #2 is the strongest, because it has no concave notch that will focus energy to one point.
But in this special case, where the concave face is always under compression, I believe the answer would probably be #3, since the line between w and the foundation is straightest, which puts the least tension on the convex face.

But it is so easy to be distracted by an ellegant style.
Fundamentally, they all connect to the ground through the same section, which is also the section with maximum moment, so all structures have the same static limit. The answer will come down to material and fabrication process.

#2 has the lowest material costs,
#1 is easiest to fabricate from stock materials, while
#3 has the greatest additional structural weight, so it comes last.

Baluncore said:
Normally I would say #2 is the strongest, because it has no concave notch that will focus energy to one point.
But in this special case, where the concave face is always under compression, I believe the answer would probably be #3, since the line between w and the foundation is straightest, which puts the least tension on the convex face.

But it is so easy to be distracted by an ellegant style.
Fundamentally, they all connect to the ground through the same section, which is also the section with maximum moment, so all structures have the same static limit. The answer will come down to material and fabrication process.

#2 has the lowest material costs,
#1 is easiest to fabricate from stock materials, while
#3 has the greatest additional structural weight, so it comes last.
Thank you so much!