Machine Design

Hi, i am looking for some help on calculations for this welded part. I know for part one you will need to solve for (area, centroid, moment of inertia, direct stress, shears stress, add direct and shear stress to get tour maximum stress).

Thanks

Part 1

-Determine the following for the welded plate in figure 1


1. The maximum shear stress


2. the specific x-y location of the maximum shear stress.

Part 2

-Assume there is a 20% fluctuation in the applied plate load. Also assume that the plate weld and or rivet yield have a stress of 6200psi and an endurance limit matching the "as forged" condition 18,000 psi. Under these conditions determine the following.


· The factor of safety for both plates under the soderberg criteria (where K=1.5 and shear stress= sigma stress/2