Answer :

Shear failure is a common mode of failure for welded connections, often distinguished by a distinct fracture pattern originating from the point of extreme stress and radiating outward.

Shear failure is the common mode of welded connection failure. This type of failure occurs when a material experiences a strain that causes it to break, fracture, or fail in a way that is different from ductile deformation. In the context of failure analysis, it is essential to identify characteristic features that can determine the point of origin and direct the fracture's progression.

For instance, in brittle materials, the point of origin typically has a distinct, often mirror-smooth texture. As the failure progresses, it will exhibit a distinctive pattern radiating outward. Similarly, in structural failures such as those in glass containers or welds, the fracture might start from impact, pressure, or thermal stress, leading to shear failure. Thermal stress, in particular, can lead to shear stress in materials, causing failure at sections where there is a rapid change in thickness.

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