Search Resources

11 Results

View
Selected filters:
  • Metals
Advanced Design and Optimization of Composite Structures I
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating

This course introduces the basic components of an airframe structure and discusses their use and limitations. The realities of composite design such as the effect of material scatter, environmental knockdowns, and damage knockdowns are discussed and guidelines accounting for these effects and leading to robust designs are presented.

The resulting design constraints and predictive tools are applied to real-life design problems in composite structures. A brief revision of lamination theory and failure criteria leads into the development of analytical solutions for typical failure modes for monolithic skins (layup strength, buckling under combined loads and for a variety of boundary conditions) and stiffeners (strength, column buckling under a variety of loads and boundary conditions, local buckling or crippling for one-edge and no-edge-free conditions). These are then combined into stiffened composite structures where additional failure modes such as skin-stiffener separation are considered. Analogous treatment of sandwich skins examines buckling, wrinkling, crimping, intra-cellular buckling failure modes. Once the basic analysis and design techniques have been presented, typical designs (e.g. flange layup, stiffness, taper requirements) are presented and a series of design guidelines (stiffness mismatch minimization, symmetric and balanced layups, 10% rule, etc.) addressing layup and geometry are discussed. On the metal side, the corresponding design practices and analysis methods are presented for the more important failure modes (buckling, crippling) and comparisons to composite designs are made. A design problem is given in the end as an application of the material in this Part of the course.

Subject:
Engineering
Material Type:
Full Course
Provider:
Delft University of Technology
Provider Set:
Delft University OpenCourseWare
Author:
Dr. Christos Kassapoglou
Dr.ir. Mostafa Abdalla
Date Added:
08/09/2019
Alloy the Way to Mars
Read the Fine Print
Educational Use
Rating

Acting as engineering teams, students take measurements and make calculations to determine the specific strength of various alloys and then report their data to the rest of the class. Using this class data, students write data-based recommendations to NASA regarding the best alloy to use in the construction of the engine and engine turbines for the Space Launch System that will eventually be used to transport astronauts to Mars.

Subject:
Mathematics
Physical Science
Chemistry
Material Type:
Activity/Lab
Provider:
TeachEngineering
Author:
Janelle Orange
Date Added:
02/03/2017
Conducting Scientific Research to Support a Claim
Conditional Remix & Share Permitted
CC BY-NC
Rating

How can we conduct scientific research so that we have evidence to support a claim?Students in this problem-based learning module are invited to design a testable question to guide Scientific Research, Evaluate the pH of various solutions, Identify Variables, Conduct a Scientific Investigation, and Analyze/Communicate results.    How can we conduct scientific research so that we have evidence to support a claim? Antacid tablets are a multi-billion dollar industry.  Claims are made regularly by certain brands that their extra strength tablets contain “DOUBLE the acid neutralizing power per tablet of regular strength antacids.”  How effective are antacids?  Are double-strength antacids twice as effective as regular strength antacids?  Have you ever noticed a parent/guardian/family member take an antacid tablet? Stomach chemistry is about acids and bases.  When the pH of a stomach is too acidic then it might make the person have a stomach ache.  In some cases “heartburn” or “acid reflux” are used as terms to describe the problems some people face.  Antacids are usually basic which, when taken, might help raise the pH level in a stomach thus making a person feel better.You are invited to design an investigation with a partner, or a team of 4 students, to test your own idea about the effectiveness of antacids.  The challenge?  Have a driving question, clear variable identification, and an analysis of your results.  Materials for your test will be provided to you by your teacher.  At the culmination of your investigation your design team will make a 30-second pitch on your phone to show at your family Thanksgiving meal to explain the benefits (or negatives) of using antacids, and how antacids work.

Subject:
Health, Medicine and Nursing
Physical Science
Chemistry
Material Type:
Lesson Plan
Author:
Blended Learning Teacher Practice Network
Date Added:
11/21/2017
Elements - Metals, Nonmetals and Metalloids
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating

This is a lab activity where the students group the given elements as metals, nonmetals or metalloids.

Subject:
Chemistry
Material Type:
Activity/Lab
Assessment
Lesson Plan
Provider:
Science Education Resource Center (SERC) at Carleton College
Provider Set:
Pedagogy in Action
Author:
Lakshmi Karthikeyan
Date Added:
12/09/2011
Environmental Chemistry Videos
Only Sharing Permitted
CC BY-NC-ND
Rating

Learn about environmental chemistry through engaging, bitesize animated videos. The videos are organised into chapters including: the earth, the air, water, rocks, metals and their reactivity, global warming, carbon chemistry, fuels and recycling.

Subject:
Physical Science
Material Type:
Lecture
Author:
Lucy Billings
Date Added:
01/28/2016
The Molecular World
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating

From diamonds to dynamite everything involves a chemical reaction. This unit introduces you to the concepts and principles that underpin chemistry at the molecular level.Everyday experiences are used to help you to understand the more complex issues.

Subject:
Chemistry
Material Type:
Activity/Lab
Reading
Syllabus
Provider:
The Open University
Provider Set:
Open University OpenLearn
Date Added:
02/16/2011
The Mystery Escape!
Conditional Remix & Share Permitted
CC BY-NC
Rating

“Breakout” or “Escape” rooms have become extremely popular for children and adults as an entertainment option to have fun and use teamwork to solve a puzzle in a designated amount of time.  The Mystery Escape! problem-based learning module leads student groups through designing their own puzzle based on Chemistry and Periodic Table of Elements.  The culmination of the Module invites students to crack codes to unlock 4 locks that give a clear answer. “Can YOU escape peril?”

Subject:
Applied Science
Material Type:
Lesson Plan
Author:
Blended Learning Teacher Practice Network
Date Added:
07/23/2018
Stiffness Relevance and Strength Relevance in Crash of Car Body Components
Read the Fine Print
Rating

This study was performed by the Institut fur Kraftfahrzeuge for the European Aluminum Association (EAA) to determine vehicle crash strength and stiffness relevance to explore possible weight reduction with high strength steel and aluminum. To determine possible reduction, quantitative values are determined for components using an FE reference model of a compact car and then compared with original equipment manufacturer (OEM) published values. It is found vehicle weight can be reduced by 11% using high strength steel and 40% with high strength aluminum. OEM experts are presented the results and interviewed. They agree with most of the studies conclusions.

Subject:
Automotive Technology and Repair
Material Type:
Case Study
Data Set
Simulation
Provider:
Center for Automotive Technology - Macomb
Provider Set:
Center for Advanced Automotive Technology
Author:
The Institut fur Kraftfahrzeuge at the University of Aachen in Germany
Date Added:
05/01/2010
Sugar and Salt Solutions
Unrestricted Use
CC BY
Rating

What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to explore the role of water.

Subject:
Chemistry
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Emily Moore
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Robert Parson
Sam Reid
Trish Loeblein
Date Added:
10/12/2011