Notes: 10:20 1 content.ilearn.mq.edu.au 2 of 3 o Casting is a very commonly used process for manufacturing jewelleries. Discuss the advantages and disadvantages of rings prepared by casting and machining? • Conclusions Activity 2: Manufacturing of Fiber-reinforced Polymer Composites (Week 11) Aim: Demonstration of manufacturing fiber-reinforced polymer composites Techniques to be applied: Hand Layup + Vacuum Bagging Lab report 2: should include the following sections (minimum three pages): • Abstract 。 Give a summary of the report by describing the objective, the lab activity you did in the lab, the results, and key conclusion. • Introduction 。 Give a description of the lab activities including the objective of the experiment, materials used, manufacturing steps used (what is hand layup and vacuum bagging process) and state the aim of each procedure. ○ Include the assessment of potential risks of the lab activities and safety measures taken to minimize these risks. • Results and Discussion o Provide discussion on obtained results (how many layers of fabrics were used, estimate the volume fraction of each phase) o Discuss the manufacturing process. What is the function of each layer (films, breather cloth, etc.)? Discuss the influences of different parameters (e.g., volume fraction, curing temperature, orientation of fibers) on the mechanical properties of the fiber-reinforced polymer composites. 。 What are the commonly used techniques for manufacturing fiber-reinforced polymer composites? Discuss the advantages and disadvantages of these techniques. • Conclusions 3. Expectation and Marking Rubric for the Report Students shall collect the necessary information and prepare a detailed report for evaluation. It is expected that students do some online search for preparing the report. The report shall be neatly typed. Sketches, photos may be included in the report. Figures should be clearly labelled with proper captions. Some of the questions will require research, where information is not available in this Unit material. The report is evaluated based on the following criteria: - - Clean the glass surface with acetone Ensure it is completely dry to make sure the fibreglass doesn't stick. Sealant tape is placed on the border of our glass, it's what we use to stick the protector film. Wax agent (honey wax) Spread the wax all over the surface evenly. Mix the resin The total weight of the fibreglass sheet equals the amount of resin we will use. (Fibreglass weighs 203g, we will use 203g of resin) 5-1 ratio from the hardener to resin. Mix and stir with a paddle stick Pour extra resin in a seperate container, slows down heat release and chemical reaction. Gives us more time to layer. Pour at % of resin per sheet (remember the 5:1 ratio) When pouring make sure to stir in one direction, avoid bubbles if possible. - Begin pouring resin and the fibreglass, constantly stirring the mixture so it doesn't harden. Cut and place a vacuum seal bag - Cut a sheet of cotton (30x25 (+50mm) Cut little squares of cotton (to plays the vacuum adapter on (10x10) Insert the vacuum seal hose and connect it to the outlet. MEASUREMENTS 30x25cm (+/-) THERE ARE 6 LAYERS WEIGH: 203 grams