List of top Applied Mechanics and Design Questions on Machine Design

A rectangular plate is perfectly welded to a gusset plate with parallel fillet weld joints as shown in the figure below. The length of the weld is \(l\) and the fillet weld leg size is \(h\). The allowable shear strength of the weldment is \(\tau_{all}\). A tensile force \(P\) is applied on the plate in a direction parallel to the length of the weld.

Assuming the throat of the weld as the weakest section, the critical load is

A closely coiled helical compression spring of mean coil diameter \(D\) and wire diameter \(d\), is loaded by an axial force \(F\).
The maximum shear stress developed in the wire is