Introduction to

Engineering

Mechanics

Dar-Yun Chiang

Introduction to

Engineering

Mechanics

Dar-Yun Chiang

ObjectivesObjectives

To provide an introduction of:

※ Fundamental concepts,

※ General principles,

※ Analysis methods,

※ Future Studies in Engineering Mechanics.

OutlineOutline

1. Engineering Mechanics2. Fundamental Concepts3. General Principles4. Static Analysis5. Dynamic Analysis6. Future Studies

1. Engineering Mechanics 1. Engineering Mechanics

Mechanics :- Rigid-body Mechanics- Deformable-body Mechanics- Fluid Mechanics

Rigid-body Mechanics : - Statics - Dynamics

Statics – Equilibrium Analysis of

particles and bodies

Dynamics – Accelerated motion of

particles and bodies

Kinematics and Kinetics

Mechanics of Materials…Theory of Vibration…

1. Engineering Mechanics1. Engineering Mechanics

2. Fundamentals Concepts 2. Fundamentals Concepts

Basic Quantities

Length, Mass, Time, Force

Units of Measurement

m, kg, s, N… (SI, Int. System of Units)

- Dimensional Homogeneity

- Significant Figures

2. Fundamentals Concepts 2. Fundamentals Concepts

Idealizations

Particles – Consider mass but neglect size

Rigid Body

– Neglect material properties

Concentrated Force

Supports and Reactions

3. General Principles3. General Principles

- Newton’s Laws of Motion First Law, Second Law, Third Law Law of Gravitational Attraction

- D’Alembert Principle : F+(-ma)=0

- Impulse and Momentum

- Work and Energy

- Principle of Virtual Work (Equilibrium)

4. Static Analysis 4. Static Analysis

Force and EquilibriumForce System ResultantsStructural Analysis Internal forcesFrictionCentroid and Moments of InertiaVirtual Work and Stability

5. Dynamic Analysis5. Dynamic Analysis

Kinematics of a ParticleKinetics: Force and Acceleration Work and Energy Impulse and Momentum (Impact)Planar Kinematics and Kinetics3-D Kinematics and KineticsVibrations

6. Future Studies6. Future Studies

飛 機 結 構 設 計 目 標 1. 成本及重量 (Cost and Weight) 2. 靜力強度 (Static Strength) 3. 耐久性 (Durability) 4. 耐損傷性 (Damage Tolerance) 5. 耐振顫及振動性 (Flutter and

Vibration) 6. 耐腐蝕性 (Corrosion Resistance) 7. 耐毀損性 (Crashworthiness) 8. 維修及製造簡易性

6. Future Studies6. Future Studies

材料力學、高等材力、結構力學、彈性力學　複合材料力學、破壞力學、連體力學、塑性力學　黏彈性力學、板殼分析、結構穩定學、有限元素法 流體力學、空氣動力學、熱力學、熱傳與燃燒 … 振動學、非線性振動學、混沌振動學 高等動力學、結構動力學、隨機振動 … 　 數值分析、機率與統計、信號處理、智慧型計算 最佳化分析、導航與控制、系統識別、…

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