All Questions
23
questions
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20
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Determine moment and shear stress door
Determine shear stress and moment of bolt:
Internal Height of Door = 198.2 cm
Internal Width of Door = 89.9 cm
Thickness Door = 3.9 cm
Weight Door = 45.76 kg or448.9 N
Elasticity = 9.8 GPa or N/mm2
...
- 1
0
votes
1
answer
28
views
What is the effect of lateral friction on the specimen shape
During compression test lateral friction occurs on the lower and upper surfaces of the specimen how does this affect the final shape of it and how do we reduce this effect?
0
votes
0
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52
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How do you plot a relation between hardness and strain
How do I plot the relation between hardness of a material and compressive strain knowing the stress-strain curve and indentation size in Brinell's hardness test
0
votes
1
answer
622
views
Why does the stress strain curve sometimes not start from zero?
Here this is a Load-Displacement curve from a compression test I did earlier with my colleges, Below is the resulted stress strain curve from the test from the lab computer why did the curve not start ...
-1
votes
2
answers
90
views
Is ultimate tensile strength is constant for a material?
Is ultimate tensile strength is constant for a material? I have performed a tensile test of a frame tube and I made the dumbbell for tensile test.
The test specimen (A) has a thickness 2mm while test ...
- 57
0
votes
1
answer
176
views
What would happen if we applied a stress greater than the yield stress to a rigid-perfectly plastic material?
Say we had a material that was rigid perfectly plastic, with a stress-strain characteristic as shown:
Say that we are drawing this material through two dies, something like this:
What would happen ...
- 117
4
votes
1
answer
12k
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Why is the Stress vs strain diagram preferable to the Load vs displacement diagram?
I’m really unsure what is the difference between stress vs. strain and load vs displacement graphs and why stress-strain is better.
I know that the units are different:
stress is in MPa and the load ...
- 41
5
votes
1
answer
220
views
"Heavy-duty" or not, can my drawer slides really support this weight?
Okay, so recently I got a Dewalt 735 Thickness Planer.
It's great at what it does. (It even LOOKS like it's ready to consume the tender flesh of lumber, like some twisted Victorian lumberjack... ...
- 153
6
votes
2
answers
169
views
Yield properties of plastic material
What is meant by yield of isotropic plastic material?
How is yield of Isotropic plastic material different from the term normal yield which is referred as transition from elastic behaviour to plastic....
- 87
0
votes
2
answers
200
views
Why does stress act a point instead of on an entire area normal to the stress?
I've often heard stress acts at a point and not on an entire cross-sectional area to which the load is applied normally.
Im a little confused here, Let us consider an area of cross-section ...
- 159
1
vote
0
answers
51
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What is the difference between $K$ ,$K_{IC}$ and $K_t$?
I have seen three representation of stress concentration factor values $K$,$K_{IC}$ and $K_t$ now all that I know is $_I$ in suffix represents opening mode of crack.The suffix $t$ stands for tip....
- 281
1
vote
1
answer
509
views
LS DYNA Material Model 163, Modified Crushable Foam
Question is on the meaning of input variable TID within material model 163 of LS-Dyna 971.
Definition of TID variable.
TID: Table ID defining yield stress versus volumetric strain at different ...
- 33
0
votes
1
answer
948
views
Using strain energy to calculate deflection
I have a solids problem I cannot solve, I have the answer and I have attempted the question. I just need to know where I am going off track, (perhaps there was an issue setting up my deflection ...
- 321
1
vote
2
answers
120
views
Stress yield of a specimen, result confusion
I am trying to calculate the static yield stress of a specimen using the
0.2% offset line on a stress strain curve. I found the static yield stress of the specimen to be the number in bold (104.1239). ...
- 321
3
votes
1
answer
727
views
Determining σxx on a 3d system with resolved forces (stress, strain, shear strain energy)
I am having trouble conceptualizing this problem. I have attempted it but am confused about a few things, I would highly appreciate any insight or advice for this.
I know you need to resolve P into ...
- 321