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Stress concentration is caused due to
- a)variation in properties of the material from point to point in a member
- b)pitting at points or areas at which loads on a member are applied
- c)abrupt change of section
- d)all of the above
Correct answer is option 'D'. Can you explain this answer?
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Stress concentration is caused due toa)variation in properties of the...
Stress concentration is the localized stress considerably higher than average, even in a uniformly loaded cross-section of uniform thickness due to abrupt change in the geometry or localised loading. The stress concentration factor is not considered harmful for ductile materials in static loading because of local yielding in ductile materials when relieving the stress concentration. When the stress in the vicinity of the discontinuity reaches the yield point, plastic deformation results in the redistribution of stresses. This plastic deformation prevents the harmful effects of stress concentration in ductile materials.
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While in Brittle materials, stress concentration factor is important in both static and dynamic loading. Brittle materials fail due to fracture. So there is little deformation to relax the concentrated stresses and thus has damaging effects.
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Stress concentration is caused due toa)variation in properties of the...
Stress concentration in a member is caused due to several factors. Let's discuss them in detail:
Variation in properties of the material:
When the properties of the material change from one point to another within a member, it leads to stress concentration. This happens because the variation in material properties affects the ability of the member to resist the applied loads uniformly. As a result, the load distribution becomes non-uniform, leading to stress concentration.
Pitting at points or areas of load application:
When the load is applied to a member at a specific point or area, it leads to stress concentration. This is because the load is not distributed uniformly across the member, and the area of load application experiences a higher stress concentration as compared to other areas of the member.
Abrupt change of section:
When there is an abrupt change in the section of a member, it leads to stress concentration. This happens because the abrupt change in section affects the ability of the member to resist the applied loads uniformly. As a result, the load distribution becomes non-uniform, leading to stress concentration.
All of the above:
All the factors discussed above - variation in properties of the material, pitting at points or areas of load application, and abrupt change of section - contribute to stress concentration in a member. Therefore, the correct answer to the given question is option D, i.e., all of the above.
Variation in properties of the material:
When the properties of the material change from one point to another within a member, it leads to stress concentration. This happens because the variation in material properties affects the ability of the member to resist the applied loads uniformly. As a result, the load distribution becomes non-uniform, leading to stress concentration.
Pitting at points or areas of load application:
When the load is applied to a member at a specific point or area, it leads to stress concentration. This is because the load is not distributed uniformly across the member, and the area of load application experiences a higher stress concentration as compared to other areas of the member.
Abrupt change of section:
When there is an abrupt change in the section of a member, it leads to stress concentration. This happens because the abrupt change in section affects the ability of the member to resist the applied loads uniformly. As a result, the load distribution becomes non-uniform, leading to stress concentration.
All of the above:
All the factors discussed above - variation in properties of the material, pitting at points or areas of load application, and abrupt change of section - contribute to stress concentration in a member. Therefore, the correct answer to the given question is option D, i.e., all of the above.
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Stress concentration is caused due toa)variation in properties of the material from point to point in a memberb)pitting at points or areas at which loads on a member are appliedc)abrupt change of sectiond)all of the aboveCorrect answer is option 'D'. Can you explain this answer?
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