CON Whly mer har the cylindrical bar is 200mm long and 20mm in diameter. It is soaded on the end and is expected to survive one million cycles of loading, with an equal maximum thensile and compressite stresses, during its lifetime. Figure 1: The S-N fatigue curve for an acetal polymer. (i) Evaluate the maximum permissible load that can be applied on the polymer bar. [5 marks] (ii) Suppose the cylindrical bar is to survive for one million cycles under conditions that provide for equal compressive and tensile stresses. Evaluate the maximum stress, the minimum stress, and the mean stress on the part during its use. Explain the effect of frequency on the stress application would have on your answers. [5 marks]