Question: Problem Statement: Design a cantilever beam that supports the weight of a human ( standard weight of 8 0 0 N ) in a seated
Problem Statement: Design a cantilever beam that supports the weight of a human standard weight of N in a seated position as part of a pool lift system. The beam will be fixed to a wall or structure and must ensure safe operation under repetitive use. The design must comply with ADA requirements, ensuring structural safety and accessibility for individuals with disabilities. Design Constraints: Weight Support: The beam must support a load of N approximately lbs representing the average weight of a person. Length of Beam: The cantilever beam must extend horizontally to ensure safe and comfortable entry into the pool you must select this dimension. Beam Dimensions: You are required to select appropriate dimensions for the beam eg crosssectional shape, length, width, etc. Force Identification: Identify all forces acting on the system. Material Selection: Select a suitable material for the beam eg steel, aluminum, composite materials considering environmental factors like corrosion from poolside conditions. Safety Factor SF: Your design must include a safety factor between and Fatigue Life: The beam should be designed for a minimum fatigue life of million cycles to account for repetitive loading during regular use. Analysis Requirements: Stress Analysis: o Calculate the normal stress and shear stress on the beam based on the selected dimensions and identified forces. Safety Factor: o Use relevant design theories eg Maximum Stress Theory, Maximum Shear Stress Theory to determine the safety factor for your design. Justify your choice of safety factor within the required range. Fatigue Analysis Safe Life Design: o Perform a fatigue analysis to estimate the fatigue life of the beam using material SN curves. o Determine the safety factor based on fatigue and discuss how it meets the lifecycle expectations. Material and Dimensions Selection: o Select suitable materials and dimensions for the cantilever beam based on the required strength, safety, and fatigue life. o Consider environmental factors such as corrosion resistance for a poolside application. c
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