Sandwich design of a lift plate for tail lift platforms for cargo trucks
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
This master thesis examines a sandwich lift plate for cargo trucks in order to propose an option for existing lift platforms in aluminium or steel. The wish is to make it lighter but not less stiff or weak. Two different cores in Divinycell with different density; H130 and H250 is examined. Calculations are made with respect to deflection and max stress in both core and faces for the whole plates. But also more local calculations are performed to see how the faces and core behaved on local point loads from pallet lift wheels.
The analytical results successfully meet the deflection requirements causing only 30 mm deflection in the worst scenario with 33% overload on a lift plate built up by 3 mm aluminium faces and H130 Divinycell core measuring a total (incl. faces) 20 mm thickness in the top. Nor did the von Mises stresses exceed 50% of ultimate strength for the aluminium parts or the Divinycell core. The choice between the lighter (H130) and heavier (H250) core only appears to affect the deflection 1-2 mm and the von Mises face stress for point loads are in the order of 10 MPa.
The objective regarding the mass of the lift plate was not met. This is however a matter of further optimisation and is considered to be solved.
Place, publisher, year, edition, pages
2015. , 39 p.
TRITA-AVE, ISSN 1651-7660 ; 2015:20
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-180276OAI: oai:DiVA.org:kth-180276DiVA: diva2:892095
Subject / course