How to decide which component is best in terms of stress and deformation?

In summary, when evaluating stress, strain, and deformation in a given component, it is important to consider the requirements and specifications needed for the component. This includes factors such as working temperature, loads, movement, creep, density, weight restrictions, and cost. CAD models and FEA analysis can help in comparing different materials and designs, but ultimately, the decision should be made by an experienced engineer with a detailed understanding of the subject at hand.
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SHAHBAZ
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Summary: In terms of stress, strain & deformation, what is better for a given component. 1) low stress or high stress 2) less strain or large strain 3) less deformation or large deformation?
Some dimensional changes were made in an existing component to study how these changes effect the component. Then CAD models of existing and modified component were made and analysed in ANSYS. Stress, strain & deformation values for both the models were found from analysis. How should I decide which model is better?

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SHAHBAZ said:
Summary: In terms of stress, strain & deformation, what is better for a given component. 1) low stress or high stress 2) less strain or large strain 3) less deformation or large deformation?
Some dimensional changes were made in an existing component to study how these changes effect the component. Then CAD models of existing and modified component were made and analysed in ANSYS. Stress, strain & deformation values for both the models were found from analysis. How should I decide which model is better?
well which case do you think would be better. And why do you say that?
 
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You have not given enough information regarding the overall component's design, material properties, observed stress values, its application and the reason for the design change for any answer to be given to your question.

Sometimes, if there is no safety or operational risk created, there are tradeoffs between design stresses vs other benefits resulting from a design revision; but, this decision should only be made by an experienced engineer based on a detailed understanding of the subject at hand. An accurate application of FEA results requires both engineering knowledge and background knowledge of how to evaluate and verify FEA analysis results.
 
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What defines "best"?
 
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Firstly, I'd say you would have to specify the requirements that the component needs to meet, once this is established you could use young's modules to eliminate materials that do not met requirements.

As with Cad models depending on software, I use solidworks, you can test the materials and compare to see if they meet requirements.

But for any of them to work and for you to make the decision firstly you need to set the components requirement, and there's a few to consider, working temperature, loads, movement, creep, density, weight restriction, cost just to name a few.
 
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1. What factors should be considered when deciding which component is best in terms of stress and deformation?

When evaluating the best component in terms of stress and deformation, it is important to consider the material properties, loading conditions, and design constraints. Material properties such as strength, stiffness, and ductility can greatly impact how a component will respond to stress and deformation. The type and magnitude of loading, as well as any external forces or constraints, should also be taken into account.

2. How can I compare the stress and deformation of different components?

To compare the stress and deformation of different components, you can use analytical methods such as equations and calculations based on material properties and loading conditions. Additionally, computer-aided design (CAD) software can also be used to simulate and visualize how different components will respond to stress and deformation.

3. Is it better to choose a component with high strength or high stiffness?

The answer to this question depends on the specific application and design constraints. In some cases, a component with high strength may be necessary to withstand high levels of stress, while in other cases a high stiffness may be more important to maintain the shape and stability of the component. It is important to carefully consider the requirements and limitations of the design before deciding which factor is more crucial.

4. How can I prevent excessive stress and deformation in a component?

To prevent excessive stress and deformation in a component, it is important to carefully consider the material properties and loading conditions during the design phase. Choosing a material with appropriate strength and stiffness, and designing the component to withstand the expected loads and constraints, can help minimize stress and deformation. In some cases, adding reinforcements or altering the shape of the component may also help distribute stress more evenly and reduce deformation.

5. Are there any testing methods to determine the stress and deformation of a component?

Yes, there are various testing methods that can be used to determine the stress and deformation of a component. These include tension, compression, and bending tests, as well as non-destructive testing methods such as ultrasound and X-ray imaging. These tests can provide valuable insights into the performance of a component and help identify any potential issues with stress and deformation.

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