What will I learn about: the fundamental concept of structural strength, specifically how materials resist heavy loads by pushing back with an equal force?

Understand the fundamental concept of structural strength, specifically how materials resist heavy loads by pushing back with an equal force.

What will I learn about: the crucial differences between stress and strain within solid materials, and how these internal forces determine a structure's overall stiffness?

Discover the crucial differences between stress and strain within solid materials, and how these internal forces determine a structure's overall stiffness.

What will I learn about: Learn how tensile forces pull atoms apart and cause 'creep,' an essential adaptation mechanism where materials safely deform and redistribute stress over time?

Learn how tensile forces pull atoms apart and cause 'creep,' an essential adaptation mechanism where materials safely deform and redistribute stress over time.

What will I learn about: why ancient castles and monuments have survived for millennia by utilizing compressive forces, which push materials together rather than pulling them apart?

Find out why ancient castles and monuments have survived for millennia by utilizing compressive forces, which push materials together rather than pulling them apart.

What will I learn about: Grasp why compressed structures typically collapse due to a lack of stability rather than a lack of strength, and how inventions like the beam make buildings safer?

Grasp why compressed structures typically collapse due to a lack of stability rather than a lack of strength, and how inventions like the beam make buildings safer.

Structures

Or Why Things Don't Fall Down

James Edward Gordon

★ 4.5 / 5(34 ratings)

Start ListeningDownload QR code that opens AudiobookHub on the App Store

Try free on iPhoneScan to start in 5 seconds

Categories:

Science

If You're Curious About These Questions...

You should listen to this audiobook

💡Have you ever wondered why the same physical laws that keep a massive skyscraper standing are also responsible for keeping a horse's body from collapsing?
💡What’s the secret to why some structures can withstand incredible stress while others shatter under a fraction of the weight?
💡Did you know that the difference between a safe, sturdy bridge and a catastrophic structural failure often lies in invisible forces that most of us never notice?

Listen to Structures — Free Audiobook

Loading player...

Key Takeaways from Structures

✓Understand the fundamental concept of structural strength, specifically how materials resist heavy loads by pushing back with an equal force.
✓Discover the crucial differences between stress and strain within solid materials, and how these internal forces determine a structure's overall stiffness.
✓Learn how tensile forces pull atoms apart and cause 'creep,' an essential adaptation mechanism where materials safely deform and redistribute stress over time.
✓Find out why ancient castles and monuments have survived for millennia by utilizing compressive forces, which push materials together rather than pulling them apart.
✓Grasp why compressed structures typically collapse due to a lack of stability rather than a lack of strength, and how inventions like the beam make buildings safer.

Learning Tools

Reinforce what you learned from Structures

Mind Map

Structures

History & Fundamentals+

Internal Forces+

Tensile Forces+

Compressive Forces+

Structural Failure+

Safety & Testing+

Quiz — Test Your Understanding

Question 1 of 8

What fundamental concept of structures did Robert Hooke discover in the seventeenth century?

A. Structures can only resist a load by pushing back with an equal force.
B. Compressive forces are inherently safer than tensile forces.
C. The elasticity of a material decreases over time under continuous stress.
D. Beams are required to channel gravitational pull away from weak foundations.

Question 2 of 8

How does the text distinguish between 'stress' and 'strain' in a solid structure?

A. Stress measures the elasticity of a material, while strain measures its breaking point.
B. Stress is the force pushing atoms apart, while strain measures how far they are pushed apart.
C. Stress applies only to artificial structures, while strain applies to biological ones.
D. Stress is a structural flaw, while strain is the weight of the load applied.

Question 3 of 8

What is 'creep' in the context of structural materials?

A. The sudden expansion of a crack when it reaches the critical Griffith length.
B. The outward horizontal force exerted on walls by a triangular roof.
C. The tendency of a compressed structure to lose stability and lean over.
D. The process by which a solid gets deformed over time under the influence of mechanical stress.

Question 4 of 8

According to the text, why do ancient masonry buildings like castles and churches remain intact for centuries?

A. They were built using materials with high elasticity and tensile strength.
B. They utilized early forms of steel beams to channel forces downward.
C. They were designed so that all structural elements are primarily under compression rather than tension.
D. They were constructed with materials that have an exceptionally long critical Griffith crack length.

Question 5 of 8

Why were beams an essential invention for the construction of buildings with triangular roofs?

A. They prevent the roof from becoming too heavy for the foundation.
B. They channel the roof's force downward, preventing outward tensile forces from pushing against the walls.
C. They increase the elasticity of the roof materials, allowing them to withstand harsh weather.
D. They counteract the circumferential stress caused by natural light entering through windows.

Question 6 of 8

What determines whether a crack poses an immediate danger to a structure?

A. Its critical Griffith crack length, which varies based on the stress levels in the material.
B. Its location relative to the nearest structural beam.
C. The age of the material, which dictates its Young's modulus of elasticity.
D. Whether the crack was caused by tensile or compressive forces.

Question 7 of 8

When a structure collapses under compressive forces, what is the primary mechanism of failure?

A. The interatomic bonds stretching until they snap.
B. The sudden expansion of holes at a 90-degree angle to the load.
C. Shearing, where one part of the material is forced to slide past another.
D. Creep, which slowly morphs the material until it loses its shape entirely.

Question 8 of 8

What causes 'fatigue' in metals, a phenomenon first noticed during the industrial revolution?

A. Adding stiff patches to weaker areas of the machinery.
B. Fluctuating heavy loads that alter the metal's crystalline structure.
C. Continuous exposure to high temperatures during operation.
D. The gradual reduction of the critical Griffith crack length due to rust.

Structures — Full Chapter Overview

1Recommendation
2The study of biological and human-made structures began in the seventeenth century.
3Stress and strain are forces acting within the material of a solid structure.
4Tensile forces pull atoms apart and can cause creep.
5Structures built on compression tend to be especially strong.
6The beam was a key invention for making compressive structures safer.
7Cracks and the misuse of some materials can cause a structure to collapse.
8Tensile and compressive forces can make structures collapse for reasons beyond cracks.
9Calculations and experiments improve the safety and efficiency of human-made structures.

Structures Summary & Overview

Structures (1978) examines the fundamental, physical laws that keep the physical structures of our world intact, from man-made structures like airplanes, to biological structures like the body of a horse. These blinks outline the ways in which our structures are prone to collapse, and the critical value of scientists who perform complex calculations to keep our structures sturdy – and keep us safe.

Who Should Listen to Structures?

Students of engineering and architecture
Biologists, ecologists, physicists and historians of science
Anyone interested in how buildings stay upright

About the Author: James Edward Gordon

James Edward Gordon was one of the founders of the field of material science. He wrote several books in a highly respected academic career and was awarded the British Silver Medal of the Royal Aeronautical Society, as well as the Griffith Medal of the Materials Science Club.

Structures

If You're Curious About These Questions...

Listen to Structures — Free Audiobook

Key Takeaways from Structures

Learning Tools

Mind Map

Quiz — Test Your Understanding

Structures — Full Chapter Overview

Structures Summary & Overview

Who Should Listen to Structures?

About the Author: James Edward Gordon

Books Similar to Structures