Hi, Iâ€™m in the second year of my B.ENG and have missed around 6 weeks of study due to illness. I have collected the notes I missed from a classmate. Iâ€™m currently struggling with Applied Mechanics. I canâ€™t understand one Example question. A question similar to this one WILL be in my end of year exam, so any help would be greatly appreciated! Its asking to design a suitable chassis for an off road military vehicle. The initial specifications are as follows; (1) Kerb weight of vehicle to be 4 tonnes. (2) Must be capable of maintaining 80 KPH up a 1 in 5 incline. (3) Must be capable of 160 KPH on level ground. (4) It must be able to start from rest on a 1 in 2 incline when fully loaded. â€¦A majority of that is to do with the Power, torque and gear calculations. Which Iâ€™m ok with. Just struggling with this questionâ€¦. 1. Chassis Calculation. For initial calculation of the chassis section the following assumptions can be used; â€¢ The weight of the engine/transmission is borne by the front sub frame and the front suspension and is therefore not carried by the chassis beams. â€¢ The weight to be taken at normal loading is 3 tonnes. And there will be two beams taking half the load. These beams are supported at both ends. â€¢ The load is assumed to be a point load acting in the middle of the beam. (A) Calculate a standard rectangular box section for each chassis section usng the following data; The Beam length to be 3 meters. The MAX allowable bending stress is 300 x 10? Nm-2 Under the worst case loading (going over an obstruction at speed) the vehicle experiences an upward acceleration equivalent to 10 times gravity. (B) Calculate the mass of each beam. (C) Assuming normal loading calculate the deflection of the beam at its midpoint. The material of the beam is Steel where E=210GPa. (D) A design change causes the loading of the beam to change so that the load is now a point load of 0.5 tonne situated 0.75m from the front of the beam and a point load of 1.0 tonne situated 2.0m from the front of the beam. Calculate the new position and magnitude of the maximum deflection under normal loading. END If anyone knows which calculations are to be used for each part of the question or has some worked examples I can use as reference that would be great. Thanks in advance for your time and any input you have to offer.