Task $1$: Read the abstracts of the case study for the topic below and formulate a Research Objective for each case study.

$$Task $2$: Read the abstracts$,$the headings and the most important sections as relevant, of the same five case studies that you selected for Task $1.$construct a simplified graphical Research Framework. Explain each of the five research perspectives in one, short sentence.

$$Note: CONCEPTS are important, not the details of each of the case studies.

Topic: Structural analysis and optimization of bicycle frame designs.

Abstract

This article analyzes the stress and optimizes the design of a customized bicycle frame using Pro$/$ENGINEER digital solid modeling computer$-$aided design software. This study attempts to verify the stress and displacement response of several types of bicycle frames using a wireframe model and then analyze the solid structure. In summary, for a shell$-$entity frame, the diamond$-$type frame $($diamond$-$shaped$)$ has the highest rigidity. The mechanical properties of AZ$60/$Al$2$O$3$p magnesium metal matrix nanocomposites by equal channel angular extrusion almost achieve the level of Al$6061$ aluminum. Keywords Bicycle frame, computer$-$aided engineering, equal channel angular extrusion, optimized design, sensitivity analysis