# Ch 2: Stress & Strain in Engineering

### About This Chapter

## Stress & Strain in Engineering - Chapter Summary

This chapter fleshes out different types of stress and strain found in engineering. You'll also learn about forms of strength, resistance, resilience, and hardening. The dashboard feature can help you stay organized through this extensive chapter, allowing you to take a look at your recent studying activity and studying progress at any time. This chapter can help you get a firmer grasp on flow stress, residual stress, elastic stress and help you comprehend the following:

- Comparing types of stress and strain in engineering
- Examining theories behind stress
- Analyzing equations and formulas related to engineering stress
- Understanding stress resistance for different materials
- Determining yield points and coefficients for stress and strain

### 1. Engineering Stress: Definition & Equation

Stress is one of the most common causes of structural failure. This lesson contains the definitions of the major types of stress, what causes them, and the equations needed to compute an object's stress.

### 2. What is Shear Stress? - Definition, Equation & Units

In this lesson, we're going to talk about shear stress, what causes it, and give examples. In addition, we'll explore equations and the units used to represent shear stress.

### 3. Maximum Shear Stress: Theory & Formula

In this section, we are going to learn about the maximum shear stress in a cross section of structural members such as beams and how they are distributed. We will also learn how rotating an element in a beam under normal stress would affect the normal and shear stress and how to evaluate the maximum of these values.

### 4. Torsional Shear Stress Formula

In this lesson, you'll learn about torsional shear stress, how it's distributed and what formulas are used to calculate it. To fully understand the lesson, you should already be familiar with shear stress and the difference between shear stress and normal stress.

### 5. What is Thermal Stress? - Definition & Equation

In this lesson, we'll discuss thermal stress, its effects on structural members, and how it is caused. We'll go over the formula for stress caused by thermal expansion and look at how thermal stress is overcome by structural design.

### 6. What is Yield Stress? - Definition & Formula

Yield stress is the amount of stress that an object needs to experience for it to be permanently deformed. This lesson will look at the definition of yield stress and how it relates to the strain the object experiences.

### 7. Modulus of Resilience: Definition & Units

This lesson explains the concept of resilience in materials science, defines the modulus of resilience and shows an example calculation of the modulus of resilience.

### 8. Fatigue Strength: Definition Equation & Coefficient

This lesson discusses the concept of fatigue strength and fatigue life using an example of a cantilever beam. A simple method to estimate it for a given material is shown, where the number of cycles to failure is related to the stress amplitude.

### 9. Stress Strain Curve: Definition & Yield Point

In this lesson, you will learn what a stress-strain curve is, how to interpret the curve and understand what the yield point is and what it indicates about the material properties at that point.

### 10. Shear Strain: Definition & Equation

In this lesson, we'll learn about shear strain, how it occurs, where it applies, and its relationship to shear stress and the shear modulus. We'll learn the equation and solve some problems.

### 11. The Difference Between Brittle & Ductile Fractures

This lesson introduces the concept of ductility, gives examples of brittle and ductile materials, and explains why ductile fracture is generally preferred over brittle fracture.

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### Other Chapters

Other chapters within the Introduction to Engineering course

- Materials & Properties in Engineering
- Temperature & Heat in Engineering
- Tools & Processes in Engineering
- Pressure in Engineering
- Tolerance in Engineering
- Basics of Structural Engineering
- Basics of Chemical Engineering
- Electricity in Engineering
- Electrodynamics
- Physics Concepts in Engineering
- Acoustics in Engineering
- Building Construction & Properties in Engineering
- Electrical Interference in Engineering