🔍 Key Concepts

• Stress concentration at sharp corners in welded structures • How crack propagation starts and spreads in metal plating • Best practices in insert plate design to reduce fatigue and cracking

💭 Think About

• Think about which corner shape spreads out stresses instead of focusing them at one point. • Which option would be used in structural design to avoid a sharp point where a crack could easily start? • Among the choices, which method directly changes the geometry of the corner, rather than just adding more weld metal?

✅ Before You Answer

• Identify which choice reduces stress concentration rather than just adding weld material. • Consider what shape is typically used on cutouts, manholes, and inserts to minimize cracking at the corners. • Eliminate any options that do not change the corner shape itself.