Concept review: flexure normal stress and flexure shear stress

Purpose

This optional learning activity will help you review the concepts of flexure normal stress and flexure shear stress in beams and shafts with transverse loading. (It does not assess problem-solving ability, however.)

• Module 07 Objective 1 List the conditions necessary to apply the flexure formulas for normal stress and shear stress for a beam experiencing transverse loading.
• Module 07 Objective 2 Understand the terms in the flexure formulas for normal stress and shear stress for a beam experiencing transverse loading.
• Module 07 Objective 3 Define centroid, second moment of area, neutral axis, neutral surface, axis of bending (flexure), transverse load, beam, longitudinal axis, axis of symmetry.
• Module 07 Objective 4 Visualize the flexure stress distribution on a cross-section of a beam experiencing transverse loading.
• Module 07 Objective 5 Identify locations on the beam where the largest compressive and largest tensile flexure stresses occur.
• Module 07 Objective 6 Visualize the shear stress distribution on a cross-section of a beam experiencing transverse loading.
• Module 07 Objective 7 Understand when and how to use the shortcut formulas for first moment of area, when computing flexure shear stress at points on the neutral surface of a beam with a rectangular, circular, or hollow circular cross-section.
• Module 07 Objective 8 Identify the location on the beam where the largest flexure shear stress occurs.
• Module 07 Objective 9 Understand some of the vocabulary, such as "section modulus", "flange," "web," etc. used by engineers who use beams in structural designs; and use beam design criteria to select an appropriate cross-section shape for a specific beam application.

These Module Objectives support the following course learning outcome(s):

• apply section properties (first, second, and polar moments of area; radius of gyration) for the purpose of stress and deformation analysis of beams, shafts, and/or columns.
• calculate and illustrate the normal and shear stress components, normal and shear strains, and deformation of standard idealized elements such as shafts, beams, columns, and thin-wall pressure vessels due to axial, torsional, and flexural loads, pressurization, and/or changes in temperature.

Task

For each question, select the best answer. Discussion and collaboration is encouraged!
Chegg and similar "homework help" websites are prohibited, due to numerous errors that misinform and confuse students.
The correct answers will be made available after you submit your first attempt. If you would like clarification, ask Jenny.
Learn the concepts so that you are able to answer all the questions correctly. Attempt this learning activity as many times as you would like.

Grading Criteria

This optional learning activity is not graded.

You will receive the most benefit from this learning activity if you discuss the questions and answers with classmates.