Find Yield displacement and Yield strength of steel under cyclic load

In summary, yield displacement and yield strength of steel under cyclic load refer to the material's response to repeated loading and unloading. Yield strength is the stress level at which a material begins to deform plastically, while yield displacement is the corresponding strain or deformation at this stress level. Under cyclic loading, steel may experience fatigue, leading to changes in its yield strength and displacement characteristics. Understanding these parameters is crucial for predicting structural performance and durability in engineering applications.
  • #1
Majeedoz
3
0
TL;DR Summary: I have experimented metal bars under cyclic load, you can find the picture attached of the hysteresis loops of "Load vs displacement" of the experimental work... 13 steps (each step 3 cycles)
Now I want to find the point where the steel started yielding and the yield strength so I can calculate dissipated energy and stiffness and also the damping ratio.
If you have an idea, please help, I may provide more details if needed.
Appreciate your help.

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  • #2
Welcome to PF.

Is this for schoolwork? Can you show your work so far please? Thanks.
 
  • #3
berkeman said:
Welcome to PF.

Is this for schoolwork? Can you show your work so far please? Thanks.
Yes, it's
that's the work, you want me to share the data from the experiment. or What do you mean?
 
  • #4
I'll go ahead and move it to the schoolwork forums for you then.

Majeedoz said:
you want me to share the data from the experiment. or What do you mean?

I'd like to see your work on this:
Majeedoz said:
I want to find the point where the steel started yielding and the yield strength so I can calculate dissipated energy and stiffness and also the damping ratio.
View attachment 343832
 
  • #5
berkeman said:
I'll go ahead and move it to the schoolwork forums for you then.



I'd like to see your work on this:
I am looking for answers from experts
whether here or there.
Thanks a lot
 
  • #6
No, it's your schoolwork, so you must show your work. We cannot help you until you show your work on your schoolwork problem/project.
 

FAQ: Find Yield displacement and Yield strength of steel under cyclic load

What is yield displacement in the context of steel under cyclic load?

Yield displacement refers to the amount of deformation or displacement that occurs in steel when it reaches its yield strength during cyclic loading. This is the point at which the material begins to deform plastically, meaning that it will not return to its original shape once the load is removed.

How is yield strength defined for steel under cyclic loading?

Yield strength is defined as the maximum stress that steel can withstand while still being able to return to its original shape after the load is removed. Under cyclic loading, yield strength can vary due to the repeated application of stress, leading to phenomena such as fatigue and potential reduction in yield strength over time.

What methods are used to determine yield displacement and yield strength of steel?

Yield displacement and yield strength of steel can be determined using various methods, including tensile testing, cyclic loading tests, and fatigue tests. These tests measure the stress-strain response of steel samples under controlled loading conditions to identify the yield point and associated displacements.

Why is it important to study yield displacement and yield strength under cyclic loading?

Studying yield displacement and yield strength under cyclic loading is crucial for understanding the behavior of steel structures subjected to repeated loads, such as in seismic or fatigue conditions. This knowledge helps engineers design safer and more durable structures by predicting failure points and ensuring that materials can withstand the expected loading conditions.

What factors can affect the yield strength of steel under cyclic loading?

Several factors can affect the yield strength of steel under cyclic loading, including material composition, temperature, strain rate, and the presence of microstructural defects. Additionally, the number of loading cycles and the magnitude of the applied stress can lead to changes in yield strength due to fatigue effects.

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