41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 1 41054 APPLIED MECHANICS Assessment Task 2 – C/D/H-level Advanced problems/mini-projects Spring 2022 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 2 Contents Assessment
task 2: C/D/H-level Advanced problems/mini-projects
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Intent
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Task Description
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Problem/mini-project 1
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Problem/mini-project 2
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How to Submit
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Marking and Feedback
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Due Dates
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Relevant Subject Learning Objectives
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Relevant Course Intended Learning Outcomes and Graduate Attributes ………………………………………………….5 Contribution to the development of Engineers Australia Stage 1 Competencies ……………………………………….5 Applied Mechanics and Design Problems Assessment Criteria and Requirements ……………………………………6 Sample
student solutions that meet the assessment criteria and requirements
…………………………………………..7 Sample student solutions that do NOT meet the assessment criteria and requirements ………………………………9 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 3 Assessment task 2: C/D/H-level Advanced problems/mini-projects This subject is assessed using specification grading and Grade, No Marks. This is a C/D/H-level assessment task. See below for details. Intent Intent Students to apply subject knowledge and methods at more advanced levels and/or to more authentic, real-life problems. Task Description Task Description Complete advanced/authentic analysis and/or design problems/mini-projects. Credit – partial completion of mini-project 1 or completion of mini-project 2 Distinction – partial completion of mini-project 1 and completion of mini-project 2 High distinction – completion of mini-project 1 and completion of mini-project 2 Problem/mini-project 1 Problem/mini-project 1 Analyse and design a multibody mechanism such as the one shown below. You can choose your own loads and dimensions for the gripper mechanism shown below. The components to be designed are the components numbered 1-4 plus the connecting pins. You may analyse and design a mechanism of your own choosing but it must be equivalent in complexity, i.e. it must have at least five functional components where the fifth component can be considered to be ‘ground’. E.g the mountain bike shown below. If in doubt about your mechanism, check with subject coordinator or tutor. For the purposes of the assessment task, you can base your design on one load case. I.e. you are not expected to do a full deign of a mountain bike. For the mountain bike you can just take an existing bike design and analyse one assumed/estimated load case and determine the factor of safety on the design. An exemplar analysis and design is provided in the Assessment Task link in Assignments on Canvas. Problem/mini-project 2 Problem/mini-project 2 Design a torsion bar to achieve a stiffness of 500 N.m per degree of twist. You do not need to know anything about racing cars, or cars in general, to do this project. Alternative mini-projects of your own choosing will be considered. They should be an open-ended design problem that makes use of two or more major topics covered in the subject. For example, the torsion bar below requires use of the torsion formulae for stress and angle of twist, and the beam flexure (for stress) and deflection formulae. It also requires choice of material. 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 4 A simple starting point is shown below. An exemplar analysis and design is provided in the Assessment Task link in Assignments on Canvas. How to Submit How to Submit Submit your problems/mini-projects as a single pdf or MS Word doc or docx file via the assignments link on Canvas. Marking and Feedback Marking and Feedback Analysis and designs will be assessed according to the assessment criteria provided below. You may ask for feedback and guidance from tutors during class and via MS Teams. Some online feedback will be provided after submissions have been assessed. Due Dates Due Dates Anytime before 6pm Friday 18th November. TREAT THIS AS THE DUE DATE. Late submissions without penalty will be accepted up until
6pm Friday 25th November. Submissions will not be accepted after this date. Do not treat this as the due date. Treat it as an automatic one-week extension without having asked for it. Do not ask for extensions beyond the 25th November. Relevant Subject Learning Objectives Relevant Subject Learning Objectives 1. Design simple machine structural components for strength and stiffness. 2. Analyse relatively simple machine structural components by applying fundamental engineering mechanics and mechanics of materials concepts to calculate internal actions. ARB ARB 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 5 Relevant Course Intended Learning Outcomes and Graduate Attributes Relevant Course Intended Learning Outcomes and Graduate Attributes Technically Proficient: FEIT graduates apply abstraction, mathematics and discipline fundamentals, software, tools and techniques to evaluate, implement and operate systems. Design Oriented: FEIT graduates apply problem solving, design and decision-making methodologies to develop components, systems and processes to meet specified requirements. Contribution to the development of Engineers Australia Stage 1 Competencies Contribution to the development of Engineers Australia Stage 1 Competencies 1.1. Comprehensive, theory-based understanding of the underpinning natural and physical sciences and the engineering fundamentals applicable to the engineering discipline. 2.2. Fluent application of engineering techniques, tools and resources. 3.2. Effective oral and written communication in professional and lay domains. 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 6 Applied Mechanics and Design Problems Assessment Criteria and Requirements Applied Mechanics and Design Problems Assessment Criteria and Requirements Demonstrates correct understanding and ability to apply and communicate engineering mechanics problem solving, stress and deflection analysis, and design for strength and stiffness proficiently and competently. Free body diagram(s) all complete and correct. For a free body diagram to be considered to be complete, it must have arrowheads on all forces and/or moments and names on all unknown quantities, e.g. FA for force at point A. Connected bodies and supports NOT shown, i.e. the body is free. Equations all complete and correct, and calculations all/mostly complete and correct (may have minor calculation errors that are carried all the way through the solution. Minor – e.g. miscalculation of an angle, error entering numbers in calculator, 1 or 2 sign errors if solution has several equations) Internal action (normal and shear force, torsion and bending moment) diagrams all/mostly complete and correct. Stress component (i.e. normal and shear stress) diagrams all/mostly complete and correct. Meets all/most of the general requirements listed below. Requirements for a technically rigorous and professionally communicated solution: FBDs, other diagrams and graphs (e.g. V and M diag.s) are large, clear and neat. Drawing instruments used. Electronic drawing tools may be used. Dimensions are meaningful and accurately reference points/locations (accurately doesn’t mean “to scale”) Axes are labelled. Locations/values clearly indicated. Significant features e.g. local maxima/minima, linear, parabolic etc. clearly presented and indicated. Solution is clear and logically set out. Terms in equations (and other solution diagrams, e.g. vector diagrams) match names/labels on FBD. Formula e.g. F = k.x, equations of equilibrium, = My/I, shown in solution to justify equations or solution diagrams. Formulae complete and correct with all symbols, subscripts, etc included x , y and z directions defined if using x , y and z components and/or +ve force/moment component directions shown. All calculated values used in solution have working shown. (i.e. values should not just appear in solution) Correct units shown on all intermediate and final answers. Appropriate use of significant figures. Examples of student work that meet these criteria and requirements are provided below the sample iterative solutions. Note that all of the provided tutorial problem solutions meet these criteria and requirements. You should use the above as a checklist when self-assessing your own work or when peer- assessing other students’ work. All of the above is relevant. Only some more detail about the design calculations etc need to be included. In the meantime, and probably of more help anyway, are exemplars of what is required for the two parts of the Assessment Task. These can be found in the same location in Assignments on Canvas where you found this document. 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 7 Sample student solutions that meet the assessment criteria and requirements Sample student solutions that meet the assessment criteria and requirements Example 1 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 8 Example 2 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 9 Sample student solutions that do NOT meet the assessment criteria and requirements Sample student solutions that do NOT meet the assessment criteria and requirements Example 1 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 10 41054 Applied Mechanics | Spring 2022 DR TERRY BROWN, FEIT, UTS 11 Example 2