Stress and Strain: Understanding Axial Loading

AI Thread Summary
The discussion centers on the concept of stress in axial loading, particularly how stress varies along the length of a rod under a uniform force. It is noted that while stress is defined as force divided by area, the stress experienced at different points along the rod can differ due to factors like material properties and constraints. The original poster seeks clarification on why stress would vary if the force is consistent and the cross-sectional area remains the same. Participants request specific references from the textbook by Popov to better address the confusion. Understanding the nuances of stress distribution in materials is crucial for grasping the mechanics of solids.
suryanarayan
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Im currently studying a course on the mechanics of solids..the reference book i use is by Popov..But i can't completely understand the concept of stress in an axial loading.Like for instance.

If a weight W acts on a rod(ignore the rod's weight),stress will vary point to point along the length..Since stress is Force/area..Assuming a uniform force distribution,Any point in any cross sectional plane will have the same stress depending on the plane's orientation with the axis of the rod.But i read that this stress varies with length.But if we consider planes parallel to each other(along the length),the areas will be same,How and Why does stress vary??the only way it would vary is if the force W varies along the length.I don't know how it happens..

please help

thanks
 
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The situation you are describing is not clear. Can you provide a page reference in Popov where this discussion takes place?
 

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