Bolted joint

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/bolted-joint

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary function?To create a mechanically secured connection between components, often allowing for disassembly
2. What is the load resistance mechanisms?Primarily through friction generated by preload (shear) and direct tensile resistance (tension)
3. How does a bolt hold parts together?When you tighten a bolt, it stretches a little and pulls the parts tight. This stretch creates a pull force called preload that keeps the parts from sliding apart.
4. Why do engineers use bolts instead of welding?Bolts can be taken apart and put back together, which makes it easier to fix or replace parts. This helps machines last longer and be repaired quickly.

Thread Engagement: The extent to which the threads of a bolt and nut intermesh, crucial for load transfer.
Axial Tension (Preload): The internal stretching force within a bolt resulting from tightening, creating clamping force.
Fretting Corrosion: Surface damage occurring at contacting surfaces subjected to slight oscillatory motion under load.
Fatigue Failure: Material failure caused by repeated application of stress, even below the yield strength.