Design of Welded Joints Numerical 3 - Design Against Static Loads - Machine Design I | Summary and Q&A

TL;DR

This video discusses the design of a welded joint for a circular shaft under static loading, using a numerical example.

Key Insights

• 🎨 The design of welded joints for circular shafts under static loading involves considering shear stress and determining the required length of the weld.
• 🎨 Safety considerations are important in the design process, and the allowable shear stress provided for the weld material is used to ensure the design is safe.
• 🪜 Adding a margin to the required weld length is a common practice to account for uncertainties or variations in the welding process.

Transcript

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Questions & Answers

Q: What is the problem statement in this video?

The problem statement involves determining the required length of a weld for a steel plate that is welded to a larger plate under an axial load of 50 kilo Newtons.

Q: What are the dimensions of the steel plate?

The steel plate has dimensions of 100mm by 10mm.

Q: How is shear stress related to weld thickness and length?

Shear stress is given by the formula tau = P / (0.707 times H times L), where tau is shear stress, P is the load, H is the base height, and L is the length of the weld.

Q: How is the required weld length determined?

By substituting the known values into the shear stress formula and solving for L, the required weld length is found to be 37.62mm. However, it is standard practice to add a margin of 15mm, resulting in a final length of 53mm.

Summary & Key Takeaways

• The problem statement involves a steel plate welded to a larger plate under an axial load of 50 kilo Newtons.

• The dimensions of the steel plate are provided as 100mm by 10mm.

• The task is to determine the required length of the weld.