Choose a design based on stress

In summary, the conversation discusses two designs for the same component, with design 1 having a stress of 120 Mpa and design 2 having a stress of 90 Mpa. Both designs are made from the same material with an ultimate strength of 290 Mpa and a yield strength of 250 Mpa. The question is which design to choose if yield strength is the only consideration. The response concludes that design two would offer more strength due to its higher factor of safety.
  • #1
2slowtogofast
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Homework Statement



Your given two designs for the same component. Design 1 has a stress pf 120 Mpa design 2 has a stress of 90Mpa. They are both made from the same material and the ultimate strength is 290Mpa and the yeild strength is 250 for both. The question is if yeild strength is the loss of function parameter which design would you pick,


I would think to choose one b/c it can handle more stress but i don't know what that has to do with yeild strength could someone point me in the right direction.
 
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  • #2
If your only criteria is yield stress, not deflection, neither fatigue life, nor weight or cost and not manufacturing. Then you are solely talking about Factor of Safety. In that case, design two will handle more accidental loads than design one, under the same requirements.
 
  • #3
Can you explain which design offers more strength ?
 

1. What is the importance of choosing a design based on stress?

In order to create a strong and durable structure, it is crucial to choose a design that can withstand the stresses and forces it will experience. This ensures the safety and longevity of the structure.

2. How do you determine the stress levels of a structure?

Stress levels can be determined through various methods such as mathematical calculations, computer simulations, and physical testing. Engineers use these methods to assess the forces and loads that a structure will experience and select a suitable design accordingly.

3. What factors should be considered when choosing a design based on stress?

There are several factors that should be considered, including the type and amount of loads the structure will experience, the materials being used, the structural geometry, and the expected lifespan of the structure.

4. Can a design be optimized for stress?

Yes, a design can be optimized to minimize stress levels and maximize its strength and durability. This can be achieved through careful analysis and adjustments to the structural elements, such as changing the shape or size of certain components.

5. How does choosing a design based on stress impact cost?

The cost of a structure can be affected by the design chosen based on stress. A more complex and optimized design may require more expensive materials or construction methods, but it can also result in a longer lifespan and potentially save costs in the long run by reducing maintenance and repair expenses.

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