Lesson 2: Structural Testing of Simple Beams

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Introduction

In this lesson, students will learn the flexure formula, Hookes Law, and the basics of structural testing of Simple Beams. Students will build Simple Beams out of several species of wood, perform structural testing and calculate: the Modulus Elasticity(E), the Modulus of Rupture(MR), the Fiber Stress at the Proportional Limit(FSPL), the Load Carrying Capacity of the Beam(P), and the deflection of the beam under Load (y).

Lesson Time

50 minute periods
3 Class Periods

Industries / Subjects / Grades

Industries / Pathways
• Engineering & Architecture
• Engineering Technology
• Engineering Design
• Environmental Engineering
• Architectural Design
• Information and Communication Technologies
• Networking
• 11

Standards and Objectives

Related Instructional Objectives (SWBAT...)

• Students will understand the basics of structural testing of elastic materials.
• A classic engineering formula, the flexure formula, will be used to determine the magnitude of bending stresses based on the known load, width, length, and depth of a beam.
• To define tension and compression and explain how materials react to these types of forces
• To be able to define the three types of stresses a material experiences when forces are applied to the material
• To understand how scientists test materials to obtain a stress-strain curve
• To understand why Newton's Third Law of Motion should be a concern to engineers when designing a bridge and be able to explain an action and reaction pair of forces
• To grasp the concepts of equilibrium, static and dynamic loads, vibrations, and resonance while studying the different types of bridges

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