Questions tagged [deformation]
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62 questions
0 votes
0 answers
67 views
Laser or waterjet cutting metal sheet with high density of holes
I have some parts to be laser cut in stainless steel sheet (probably ss304) incorporating small (3mm diameter) holes in large numbers and very close together. Deformation or buckling due to heat is ...
- 1
1 vote
2 answers
74 views
How to model elastically squeezing a triangle?
I'm trying to figure out how a spring that looks like this behaves. I'm assuming the bottom foot can freely rotate but is otherwise fixed in position. The top foot can also freely rotate, but it is ...
- 113
0 votes
1 answer
53 views
FEM: Should I updates inner variable during iterations for Newton-Raphson's method?
When you apply Newton-Raphson's method for FEA about quasi static mechanical analysis, will you update all inner vaiables not only stress, strain, but also variables that depends on deformation path ...
- 3
0 votes
1 answer
111 views
Confusion in deriving von Karman equation for strip rolling
In the derivation for von Karman equation for metal strip rolling, an infinitesimal element is chosen as shown in the picture above. The equilibrium equation for the element is as follows: $$\left[\...
- 15
0 votes
5 answers
133 views
Why does restoring force of a spring vary directly with elongation or compression?
The restoring force is electromagnetic in origin, having to do with atomic/molecular interactions. Both electrostatic as well as magnetic forces vary inversly with the square of distance. $F_{_{EM}}\...
0 votes
1 answer
316 views
How to go from a metal sheet to a metal box using (set of) dies only?
As a hobbyist, how to go from a metal sheet to a metal box (1 hollow side) by using (set of) dies only? All videos I watched involved : bending 1 side at 90° then A) cut twice and discard a square ...
- 101
0 votes
0 answers
152 views
Ansys Mechanical Section Plane Error
I'm attempting to make a deformation analysis for a specific scenario in Ansys Mechanical. Everything seems to be fine, but when I try to use a section plane, the deformed region appears to be 'hollow,...
5 votes
1 answer
193 views
Creep of the materials
Does creep exists for all materials at any stress at room temperature? I searched for this and could not find any answer other than creep isn't significant at low stresses and low temperatures. What I ...
- 153
1 vote
5 answers
131 views
Describing 180 degree arcing/deflection of wire supported vertically at one end
I am trying to understand how to describe and calculate the shape a length of piano wire makes from its own weight when supported vertically at only one end. Is it a catenary or a parabola? ...
0 votes
1 answer
41 views
Calulating the compression deformation using strain data measured by strain gauge _ material engineering
I'm studying material engineering and conducting some experiment. The experiment was measuring the strain of long steel bar. The bar is compressed from left side and deformed shortened. Using strain ...
- 1
0 votes
1 answer
171 views
Beyond the codes maximum deflection in primary Aluminum beam
we had a alum pool enclosure built that has a primary beam carrying the roof trusses across it's length. the primary beam is a 4x8 bx beam spanning 43'between supports. the beam has started to show ...
0 votes
2 answers
376 views
Maximum Deflection for simply supported beam under arbitrary triangular loading
I am trying to get the: maximum deflection location of maximum deflection deflection at any point For a beam under an arbitrary triangular load (i.e. a, b, c, and w can vary). I tried to solve this ...
0 votes
1 answer
48 views
Can stress tensor be defined on feature edges?
Assume a rod is being extruded out of a cylinder by pushing the cylinder into a hole (See Figure below). Do the feature edges (or corners in 2D) cause the traction (the surface force) to be ...
- 141
0 votes
0 answers
385 views
How to calculate the spring force of a rolled piece of steel?
If you have a steel sheet and then curled it to the point of being a semi-circle with a 30 degree (pi/6) gap from completion (...
0 votes
1 answer
3k views
Rotation Matrix for a Stress Tensor Matrix
In my engineering mechanics course, I came across the following rotation matrix, for a stress tensor, for a counter-clockwise rotation. However, this is completely different, actually a transpose of ...
