Introduction To Engineering Bike Lab #1 - 1 Agenda Overview of the Bicycle Labs.

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Presentation transcript:

Introduction To Engineering Bike Lab #1 - 1 Agenda Overview of the Bicycle Labs

Goals of the Bicycle Labs Learn what engineering is. Show how different disciplines of engineering (mechanical, materials, electrical, industrial, and others) are associated with one product. Show how physics and mathematics are used in engineering. Develop communication skills.

By the end of these labs you will be able to: Know about material properties such as specific weight, strength, elasticity, fatigue, and others. Know how to take measurements of structural components. Know how to take and record data using digital data acquisition system. Know about the design process. Gain experience in teamwork and report writing.

Why Bicycles ? Bicycles are one of the most efficient modes of human transportation. Bicycles are widely used. Many competitive designs do effectively the same thing. Bicycles represent a thriving sector of the economy.

Lab Sessions Weeks 2-8 Each lab will start with a presentation on key concepts. After the presentation you will conduct the experiment and complete worksheets and/or lab reports.

Bike Labs Bike Lab 1: Learn about material properties, measurement instruments; estimation of the weight of a bicycle frame. Bike Lab 2: Materials as structural components; bending of beams.

Bike Labs Bike Lab 3: Sensors, data acquisition, analog and digital data; static loads on bicycles. Bike Lab 4: Strength and reliability of engineering materials, failure, fatigue; dynamic loads on bicycles.

Bike Design Consumers have many varied desires when buying a bicycle. Design goals depend on the kind of bike and targeted customers. Types of bikes:  Road bikes: Racing, cruising, commuter, touring.  Mountain bikes: Trail, downhill.

Generally Desired Features: Lightweight Good handling Proper stiffness (some debate on exactly what’s ‘proper’) Durability Reliability Low maintenance Low cost Design trade-offs treated differently for varied applications. Example: Olympic racing bicycles can be much more expensive if weight can be reduced.

Different Bicycle Designs Attempts to meet design goals: Welded steel frames Brazed steel frames Different geometries of frames

Aluminum frames (aluminum is lighter than steel, steel is cheaper) Titanium Frames (titanium is heavier than aluminum but lighter than steel and stronger than both) Composite frames, carbon fibers in epoxy matrix (light and strong but expensive to manufacture) Different Bicycle Designs (continued)

Examples of Bicycle Design Huffy - mountain bike, steel welded frame

Giant - road bike Examples of Bicycle Design

Merlin - titanium frame ($2399 only the frame) Examples of Bicycle Design

Cannondale - road bike, Aluminum frame, carbon fiber composite fork Examples of Bicycle Design

Examples of Nontraditional Bicycle Design

Video on design, manufacturing, and testing of Cannondale bikes. Examples of Bicycle Design

For tomorrow… Read Bike Lab #1 procedure CAREFULLY!!!