Materials and structures under shock and impact / Patrice Bailly.

Format:

Book

Author/Creator:

Bailly, Patrice.

Series:

Mechanical engineering and solid mechanics series.

Mechanical Engineering and Solid Mechanics Series

Language:

English

Subjects (All):

Shock (Mechanics).

Materials--Dynamic testing.

Materials.

Physical Description:

1 online resource (254 pages).

Edition:

1st ed.

Place of Publication:

London, England ; Hoboken, New Jersey : ISTE Ltd : John Wiley & Sons, 2014.

Language Note:

English

Summary:

Materials and Structures under Shock and Impact In risk studies, engineers often have to consider the consequences of an accident leading to a shock on a construction. This can concern the impact of a ground vehicle or aircraft, or the effects of an explosion on an industrial site. This book presents a didactic approach starting with the theoretical elements of the mechanics of materials and structures, in order to develop their applications in the cases of shocks and impacts. The latter are studied on a local scale at first. They lead to stresses and strains in the form of waves propagating through the material, this movement then extending to the whole of the structure. The first part of the book is devoted to the study of solid dynamics where nonlinear behaviors come into play. The second part covers structural dynamics and the evaluation of the transient response introduced at the global scale of a construction. Practical methods, simplified methods and methods that are in current use by engineers are also proposed throughout the book.

Contents:

Cover

Title page

Table of Contents

Introduction

PART 1. DYNAMICS OF SOLIDS

Chapter 1. Motion within Solids

1.1. Representation of the medium

1.1.1. Framework of continuum mechanics

1.1.2. Representation of motion

1.1.3. Representation of internal forces

1.2. Elastodynamic equations

1.2.1. Navier equations

1.2.2. Strain waves

1.3. One-dimensional waves

1.3.1. Uniaxial stress state

1.3.2. Uniaxial strain state

1.3.3. The d'Alembert solution

1.4. Harmonic waves

1.4.1. Definitions

1.4.2. Wave dispersion

1.4.3. Dispersion of waves in a rod

1.5. Viscoelasticity

1.5.1. Representation of rheological behavior

1.5.2. Creep and relaxation functions

1.5.3. Rheological models

1.5.4. Complex modulus

1.5.5. Waves in viscoelastic media

Chapter 2. Shocks in Solids

2.1. Discontinuity of stress and velocity

2.1.1. Conservation equations

2.1.2. State diagram

2.2. Wave course

2.2.1. Lagrange diagram

2.2.2. Reflection on a free extremity

2.2.3. Reflection on a fixed extremity

2.2.4. Diffraction at an interface

2.2.5. Waves and modes

2.3. Shocks of solids

2.3.1. Shocks of two solids

2.3.2. Successive shocks

2.3.3. Wave trapping and cracking

2.4. Shocks on viscoelastic solids

2.4.1. Conditions at the interface

2.4.2. Impact of an elastic solid on a viscoelastic solid

2.4.3. Shock of two viscoelastic solids

2.4.4. Propagation of shock in a Maxwell solid

Chapter 3. Waves and Shocks in a Nonlinear Medium

3.1. Irreversible phenomena

3.1.1. Impact velocity

3.1.2. Load paths

3.1.3. Strain velocity

3.1.4. Shear and plasticity

3.1.5. Behavior under high pressure

3.2. Adiabatic shear

3.2.1. Dynamic and thermal

3.2.2. Adiabatic shear condition

3.3. Propagation in uniaxial stress state.

3.3.1. Elastoplastic material

3.3.2. Viscoplastic material

3.4. Uniaxial strain state

3.4.1. Metallic material

3.4.2. Geomaterial

3.5. Shock waves

3.5.1. Origin of the phenomenon

3.5.2. Compaction at the passage of a shock wave

3.5.3. Notion of state law

Chapter 4. Dynamic Materials Testing

4.1. Dynamic testing

4.1.1. Testing means

4.1.2. Specific difficulty

4.2. Hopkinson pressure bars

4.2.1. Device

4.2.2. Principle of the test

4.2.3. Analysis of the test

4.2.4. Types of loads

4.3. Testing by direct impact

4.3.1. Device

4.3.2. Analysis of the test

4.4. Taylor impact test

4.4.1. Principle of the test

4.4.2. Simplified analysis

4.5. Plate impact

4.5.1. Devices

4.5.2. Analysis elements

PART 2. DYNAMIC OF STRUCTURES

Chapter 5. Impact on a Simple Structure

5.1. Basic structure

5.1.1. Linear system with one degree of freedom

5.1.2. Short-term loads

5.2. Shock response spectrum

5.2.1. "Slot" impulse

5.2.2. Various types of pulses

5.2.3. Alternating loading

5.2.4. Dynamic amplification factor

5.3. Iso-damage curves

5.3.1. Impulsive loading

5.3.2. Alternating load

5.4. Modeling a real structure

5.4.1. Definition of an equivalent system

5.4.2. Beams in flexion

5.4.3. Shock on a beam

5.4.4. Blast on a beam

5.4.5. Shock on a mass supported by a mast

5.4.6. Shock on a structure

Chapter 6. Collisions of Structures

6.1. Shocks on elastic structures

6.1.1. Equations of motion

6.1.2. Impact of a relatively flexible projectile

6.1.3. Coupling in a collision of two structures

6.1.4. Fall of a rigid body onto a flexible structure

6.2. Shock with crushing

6.2.1. Crushing phenomena

6.2.2. Impact force

6.3. Classification of shocks

6.3.1. Hard shock and soft shock

6.3.2. Shock with rebound or crushing.

Chapter 7. Explosions and Blasts

7.1. Accidental explosions

7.1.1. Importance of the risk of explosion

7.1.2. Gas explosion process

7.1.3. Explosion with confinement

7.2. Pressure waves

7.2.1. External wave from a detonation

7.2.2. External wave after deflagration

7.3. Action of an explosion on a structure

7.3.1. Reflection of a shock wave

7.3.2. Response spectrum to a detonation

7.3.3. Simplified model of an action on a structure

7.4. Blast-structure coupling

7.4.1. Coupling conditions

7.4.2. Linear approach to coupling

Chapter 8. Mechanical Response of Beams

8.1. Dynamic beam models

8.1.1. Notations

8.1.2. Bernoulli model

8.1.3. Rayleigh model

8.1.4. Timoshenko model

8.2. Impacts on beams

8.2.1. Adaptation of the model to a time scale

8.2.2. Impact at the center of a beam

8.2.3. Beam acted upon by a blast

8.2.4. Solicitation in a section of a beam under impact

8.3. Calculation by modal superposition

8.3.1. Eigenmodes of displacement

8.3.2. Modal base projection

8.3.3. Example of a blast against a wall

8.3.4. Transfer function through a bending element

8.4. Dynamic buckling

8.4.1. Equation of motion for elastic buckling

8.4.2. Response to a pulse

Chapter 9. Responses of Multiple Degree of Freedom Structures

9.1. Modeling through a discrete system

9.1.1. Equations of motion

9.1.2. Search for eigenmodes

9.2. Resolution by modal superposition

9.2.1. Projection on a modal base

9.2.2. Example

9.3. Fluid-structure coupling

9.3.1. Small movements of fluids

9.3.2. Concept of added mass

9.3.3. Sloshing mode

9.3.4. Coupling with a structure

Chapter 10. Response of a Nonlinear Structure

10.1. Nonlinear behavior of structures

10.1.1. Metallic structures

10.1.2. Reinforced concrete structures.

10.1.3. Flexion and extension in large displacements

10.2. Nonlinear system with one degree of freedom

10.2.1. Formula

10.2.2. Pulse load

10.2.3. Plastic rigid approach

10.3. The case of elastoplastic behavior

10.3.1. Pulse load

10.3.2. Nonlinear response spectrum

10.3.3. Equivalent system

10.4. Approach of response to a violent impact

10.4.1. Shock on a beam

10.4.2. Impact of a distributed load

Bibliography

Index.

Notes:

Bibliographic Level Mode of Issuance: Monograph

Includes bibliographical references and index.

Description based on print version record.

ISBN:

9781118815717

1118815718

9781118816042

1118816048

9781118815656

1118815653

OCLC:

865655094