Discussion
Identify whether the following statements regarding bending stress and strain in a beam are true or false.
S1: The neutral surface of the beam experiences zero bending strain.
S2: The value of bending stress is zero at the neutral surface of the beam.
Answer: C
Both statements are true. In pure bending the fibres on one side of the beam are stretched and those on the other side are shortened, so there is a surface between them, the neutral surface, where the length does not change: the bending strain is zero. Since stress is proportional to strain in the elastic range (\(\sigma = E\varepsilon\)), the bending stress there is also zero, as the flexure formula \(\sigma = My/I\) shows when y = 0. The options that call either statement false are wrong.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development