Engineer Inyang Effiong took early retirement from Shell and he is into a number of crazy things these days! I am not exaggerating! If a man will ride a bicycle from Lagos to Port Harcourt or ride a motorbike across the Sahara and cross to Europe, I think not many people will blame me for calling him crazy. Effiong himself pleads guilty to the charge!
I knew him as a younger man when he was still in school studying to become an engineer late in the 1980’s. At that time he, with a group of equally crazy fellow students from Science, Engineering, Medicine, etc., taught themselves programming and, despite their declared majors in those days, they would scare any serious computer major. It is no wonder that today, Effiong and his co travellers have reached commanding heights in Software and services in the country.
I was surprised that in his two visits to my place here in Omu Aran, Inyang has morphed into a reporter and journalist! Here are the two interviews we did together for the InyangEffiong Show. Enjoy!
Some project students have been trying to see me. In order that we don’t misunderstand one another let me make it clear that I want meetings with students to be well-defined. It is even better when there is a memo stating the matters for discussion. As you do that, note the following:
1. I will not do YOUR project for you. My duty is to empower you with the theory and skills you need to model, design and analyse products. I am doing that in MCE 511 and 534. You can ask me specific questions in these courses.
2. Your project is not a welding and fabrication project. The major thing is to turn an idea into a product by creating the basis for the specifications. Any person can be taught to weld parts together in a short time. The engineer’s training is to determine the shapes and sizes based on deep knowledge of how these materials are known to react to loading: mechanical, thermal, shock, etc.
3. Simulation of simple parts in MCE 511 is the best preparation to get this done. When you neglect the examples and demos in that course and are wanting to see me; the question is: See me for what?
I am putting a number of Motorcycle trailer ideas from the web on this page. You can have a look and decide on what direction you want to move.
The work of designing a trailer can be broken into at least two parts:
1. The Chassis, Moving Parts and Suspension System
2. Coupling and Body (This can be neatly done in sheet metal by Fusion 360)
It is either you are divided into two groups to concentrate on these or that another set join to take one aspect.
If you work in groups, you must agree on the specifications that will make the work of one group fit into the results from the other.
It is also a good idea to select what parts can be bought rather than made from scratch. There are some things that are better purchased than made for different reasons. We can discuss these ideas.
Please do not look for me. If you want a meeting, state the specific purpose as a response to this write up. I will respond and we can easily arrange a meeting. No open-ended meeting with no purpose!
Much of what you have here is already in the video. While most of you already got these slides in class, they are posted here for completeness and for the benefit of other students using these materials outside of Landmark University:
The solutions here are given in General Tensors rather than Cartesian tensors. Most problems only include General tensor constructs that have Cartesian equivalents. Here are a few modifications you can make:
1. Note that you can convert superscripts to subscripts and the Cartesian tensor meaning remains intact.
2. The base tensors change from g to e. Again, downgrade the superscripts.
3. When a term has both superscripts and subscripts, let the superscripts downgraded come consistently after the subscripts at the same position.
4. The six indexed Kronecker deltas are simply products of two three indexed Levi-Civita third order alternating tensors.
If there are still clarifications you need, let me know.
The following slides presents a quick introduction to the definitions and results of Tensor Algebra.
The homework is due next week before lecture hour
Here are the solutions to the first set of practice questions on the review of Vector Analysis on our way to Basic Tensor Algebra:
To make matters simple and easy, We have restricted considerations to Cartesian coordinates here. For full general tensor results, consult the notes in SSG 805 (on this site) given to graduate students.
Here is a video of first half of this week’s class.
I need your comments to know if the video is too long and I can give you a shorter one next time. My opinion of the ones online is that they are too short. Of course, one can easily over do!
Watch out for Part Two
To change the default coordinates in Fusion 360, go through these steps:
1. Click on your name near the top right corner of the Fusion 360 working screen
2. Look in the preferences where it says “Y-up”. It is number 6 under “Controlling general UI behaviour”.
This means the coordinate y is going vertically upwards.
3. Click on it, you will see that there are two options: Select “Z-up”
4. Accept the result.
5. Enjoy the bliss of 3D parametric modeling.
MCE511 Computer-Aided Engineering Design and Analysis (2 Units)
Overview of Computer-Aided Design and Analysis: History of CAD/E, characteristics of CAD/E, overview of the industrial application of CAD, CAE, and CAM, functions of CAD/CAE/CAm systems, information embedded in a CAD system, tools commonly used in CAD. Hardware and software of a CAD/E System;Computer hardware, typical CAD/CAE.CAM system configuration, concepts of graphics display, various input and output devices, data structure and database management systems, graphical coordinate systems, software function and application modules, current Geometric Transformation – 2-D and 3-D geometric transformation, projections, generation of multiple views for an engineering drawing Curve and Surface Modeling; Parametric representation, analytical and synthetic curves, Hermite cubic splines, Bezier curves, B-Spline curves, introduction of NURBS, surface patch, bilinear surface, lofted surface, bi-cubic surface, Bezier surface, B-spline surface, surface offset and blend Geometric Modeling; Comparison of wireframe, surface and solid modeling, CSG, B-rep solid modeling techniques, feature-based parametric modeling, CAD/CAM data exchange methods, IGES, STEP and PDES. Basics of Finite Element Analysis (FEA) – Concepts of elements and discretization, unit displace method, procedure of finite element analysis on computer; automatic mathematical problem formulation in computer, truss element, commonly used model and element types, limitations and common misconceptions about FEA