Can Software Calculate Creep and Stress Relaxation in Spring-Damper Models?

In summary, the conversation is about a possible software that can calculate creep and stress relaxation for a model of springs and dampers. The use of Matlab/Simulink and Mathematica is suggested, with the caveat that the equations must be put together in the s-domain. There is also a mention of using impedances to combine components and get displacement as a function of load. The speaker also expresses doubts about applying the Heaviside step function in the traditional way due to the model's lack of a free "extremity."
  • #1
Stealth101
2
0
Hi all, I have a question.

Does exists a software that is able to calculate creep and stress relaxation of a model of springs and dampers?

Is Matlab/Simulink able to do this?

Thanks in advance.
 
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  • #2
Hi Stealth101, welcome to PF. If you're able to put the components' constitutive equations together in the s-domain, any symbolic software should be able to find the inverse Laplace transform, which will give you the equations you're looking for. Mathematica can do it, certainly; I'm pretty sure the Matlab can also, but I don't have that immediately at hand.
 
  • #3
Mapes said:
If you're able to put the components' constitutive equations together.

I have some doubts about the equations, because I have to study a model without a free "extremity" so I can't apply the Heaviside step function in the classic way.

Practically this model has the "chassis" both on the right side and left side.

I'm sorry for my poor English.
 
  • #4
Still, if you can turn all the components into impedances (k for springs, for dashpots), hopefully you can combine them like springs and get displacement as a function of load.
 
  • #5


Hello there,

Thank you for your question. I can say that there are indeed software programs that are capable of calculating creep and stress relaxation of a model of springs and dampers. One such program is called ANSYS, which is commonly used in engineering and scientific fields for simulation and analysis purposes.

Matlab/Simulink is also a powerful tool that can be used for this purpose, as it has various modules and functions specifically designed for analyzing mechanical systems and their behavior under different loading conditions. However, it may require some additional coding and customization to accurately model creep and stress relaxation in springs and dampers.

I recommend consulting with a mechanical engineer or a specialist in computational mechanics to determine the best software and approach for your specific model and research goals. They can also provide guidance on how to properly set up and interpret the results from these simulations.

I hope this helps. Best of luck with your research!
 

FAQ: Can Software Calculate Creep and Stress Relaxation in Spring-Damper Models?

1. What is creep and stress relaxation?

Creep and stress relaxation are two related phenomena that occur in materials when they are subjected to a constant load or stress. Creep is the gradual deformation that occurs in a material over time under a constant load, while stress relaxation is the gradual decrease in stress over time under a constant deformation.

2. What causes creep and stress relaxation?

Creep and stress relaxation are caused by the movement of atoms or molecules within the material. In creep, this movement results in a gradual change in the material's shape, while in stress relaxation, it leads to a decrease in the material's stress level.

3. How do we measure creep and stress relaxation?

Creep and stress relaxation can be measured using a variety of techniques, such as tensile testing, compression testing, and creep testing machines. These methods involve subjecting the material to a constant load or stress and measuring the resulting deformation or stress over time.

4. What factors affect creep and stress relaxation?

Several factors can influence the creep and stress relaxation behavior of a material, including temperature, load or stress level, and the material's structure and composition. For example, higher temperatures and higher stress levels generally result in faster rates of creep and stress relaxation.

5. How can we prevent or control creep and stress relaxation?

Certain materials, such as metals and polymers, are more prone to creep and stress relaxation than others. To prevent or control these phenomena, engineers and scientists often use materials with better creep and stress relaxation resistance or employ design techniques that distribute the load or stress more evenly across the material.

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