For a beam subjected to a moment, what is the relationship between bending stres
Practice Questions
Q1
For a beam subjected to a moment, what is the relationship between bending stress and moment?
σ = M/I
σ = I/M
σ = M*I
σ = M*E
Questions & Step-by-Step Solutions
For a beam subjected to a moment, what is the relationship between bending stress and moment?
Step 1: Understand that a beam can bend when a force is applied to it, creating a moment (M).
Step 2: Recognize that bending stress (σ) is the internal stress that develops in the beam due to this bending.
Step 3: Learn that the moment of inertia (I) is a property of the beam's cross-section that affects how it resists bending.
Step 4: Know the formula that relates bending stress (σ), moment (M), and moment of inertia (I): σ = M/I.
Step 5: Realize that as the moment (M) increases, the bending stress (σ) also increases if the moment of inertia (I) remains constant.
Bending Stress and Moment Relationship – The bending stress in a beam is directly proportional to the applied moment and inversely proportional to the moment of inertia of the beam's cross-section.