Table of Contents
- 1 How do you choose a suitable factor of safety?
- 2 What are the factors to be considered for design a machine?
- 3 How are factors of safety determined and on what basis?
- 4 Which is important factor while selection material in product design?
- 5 Can the safety factor of a part be greater than design factor?
- 6 What is the factor of safety in Mechanical Engineering?
- 7 What is partial safety factor in structural engineering?
How do you choose a suitable factor of safety?
Factors to be considered while selecting the factor of safety:
- The properties of the material and the possible change of these properties during operation.
- Type of applied load, whether it is Gradual or Impact.
- Initial stresses set up during manufacturing of component.
- The extent of localised stresses.
- Mode of failure.
What are the factors to be considered for design a machine?
The various design considerations, listed above, are discussed as follows:
- Strength. The machine elements are subjected to any one or combination of loads like forces, bending moments and torque.
- Rigidity.
- Reliability.
- Safety.
- Cost.
- Weight.
- Ergonomics.
- Aesthetics.
What are the factors affecting the factor of safety in design?
The factor of safety also depends on numerous other considerations such as the material, the method of manufacturing , the various types of stress, the part shapes etc. Material selected, type of load, working condition. 2. Nature of Force Which acts on that Material.
How are factors of safety determined and on what basis?
Determining the factor of safety: Ductile materials use the yield strength to determine the safety factor. Brittle materials use the ultimate strength. Yield strength: Determines the safety factor until the start of deformation. Ultimate strength: Determines the safety factor until failure.
Which is important factor while selection material in product design?
These factors include: Material costs – What materials will cost effectively meet the design requirements. Manufacturability – Is the material readily available? Can it easily be used in the manufacture of your product?
What is are the factor s affecting design period?
Factors Affecting Design Period are as follows. Availability of funds If funds are not available, one has to keep a smaller design period. Interest rates If interest rate is small, a higher value of the design period may be economically possible.
Can the safety factor of a part be greater than design factor?
At the minimum, the safety factor can be equal to the design factor. To explain let us take an example of a part which has a design factor of carrying 3 LB load. But the part is actually designed to handle 30 LB load. So ideally the part still has a design factor of 3 but in actual it can withstand up to 30 LB which is the safety factor.
What is the factor of safety in Mechanical Engineering?
In mechanical engineering, mathematically Factor of safety is the ratio of material strength and allowable stress. For example, if the required specification of a shaft is to withstand a 100 kg load. But if we design the shaft to withstand a 200 kg load. The safety factor for the Shaft is “two”.
What is the factor of safety in manufacturing?
Variation in the manufacturing process. In mechanical engineering, mathematically Factor of safety is the ratio of material strength and allowable stress. For example, if the required specification of a shaft is to withstand a 100 kg load. But if we design the shaft to withstand a 200 kg load.
What is partial safety factor in structural engineering?
A partial safety factor relates to limit state design. This method of design is commonly used in modern structural engineering design. A factor of safety relates to permissiable stress design design. A method of structural engineering design that is now superseded by limit state design.