Critical states, strength and lifetime of the matter : technical structures, living organisms, environment / Valeriu V. Jinescu.

Format:

Book

Author/Creator:

Jinescu, Valeriu V., author.

Series:

Environmental science, engineering and technology series.

Environmental Science, Engineering and Technology Series

Language:

English

Subjects (All):

Environmental sciences.

Physical Description:

1 online resource (382 pages)

Edition:

First edition.

Place of Publication:

New York : Nova Science Publishers, [2024]

Summary:

"The scope of this book makes it possible to solve many cases of loading superposition and/or cumulation occurring in technical structures, living organisms and the environment. This book's objectives include: - the unitary treatment of problems related to the strength, critical states and lifetime of technical structures, by taking into account their deterioration, residual stresses, irreversibility and rate of loading processes; - the provision of solutions to superposition and/or cumulation of loads of the same nature but of different types, of those of different nature (mechanical, thermal, chemical, electrical, magnetic, nuclear etc.), in the case of technical structures, of living organisms and the environment; and - to provide support in improving some design code"-- Provided by publisher.

Contents:

Intro

Contents

Preface

Notations

Chapter 1

Loads and Strength

Abstract

1.1. Concepts of Loading and Strength for Technical Structures, Live Organisms and Environment

1.2. The Advantage of using some New Issues Originating from Literature

Chapter 2

Loads, Allowable and Critical States of Matter

Chapter 3

Synthesis on the Laws of Behavior of Matter Used in Some Chapters of Science

Chapter 4

Factors Influencing the Behavior of Matter

Chapter 5

Energy and Correlated Concepts. The Postulate of Energonics

5.1. The Concept of Energy

5.2. Categories or Forms of Energy

5.3. Work

5.4. Concepts Correlated with Energy Concept

5.5. The Postulate of Energonics

Chapter 6

Critical States, Critical Energies and the Law of the Critical States of Matter

6.1. Critical States and Critical Energies

6.2. The Law of the Critical States of Matter

Chapter 7

Principle of Critical Energy (PCE)

7.1. PCE Statement and Mathematical Expressions Using Classical Concepts in Mechanics of Deformable Solid

7.2. Critical and Allowable Participation

7.3. Mathematical Expression of PCE in the Conceptual Frame of Fracture Mechanics

Chapter 8

The Law of Equivalence of Processes and Phenomena

Chapter 9

Law of Transitional Regimes

9.1. The Law

9.2. Transitional Regimes in Technology

Chapter 10

Methods of Calculation for Determining the Admissibility of the Loading State

Chapter 11

Strength, Critical States and Lifetime Calculation for Technical Structures under Cyclic Stresses Loading

11.1. Isothermal Cyclic Stress with a Single Stress Block

11.2. Succession of Isothermal Stresses Blocks

11.2.1. Succession of Normal Stresses Blocks.

11.2.2. Succession of Normal and Tangential Stresses and Superposition of Normal and Tangential Stress Blocks

11.2.3. Alternating Symmetrical Cyclic Loading

11.3. Strength, Critical State and Lifetime of Structures Fatigue Loaded with a Stress Block in Each Area of the Wöhler Diagram, Taking into Account Its Deterioration and Residual Stresses

11.4. Lifetime of Structures Made from Materials with Nonlinear or Linear Behavior, Subject to Variable Fatigue

Chapter 12

Strength and Critical States of Technical Structures without Cracks, under Compound Stresses

12.1. Some Practical Examples

12.2. Deteriorated Structure but without Cracks under Compound Stresses

Chapter 13

Critical State Analyzed with Fracture Mechanics Concepts, in the Case of Mixed Mode Fracture

13.1. Critical State of the Technical Structures with Cracks, Determined on the Basis of the Principle of Critical Energy, Expressed by Using Fracture Mechanics Concepts

Chapter 14

The Strength Calculation of Cracked Mechanical Structures by Fracture Mechanics and Energonics

a Comparison

Chapter 15

Loads/Stresses Superposition in the Case of Tubular Structures

15.1. Superposition and/or Cumulation of Loads/Stresses, Taking into Account the Critical Participation

15.2. Strength of Tubular Structures without Cracks and/or Other Deterioration and without Residual Stresses

15.3. Strength of Tubular Structures with Deterioration and Residual Stresses

15.3.1. The Critical State in Cylindrical Shells with Cracks under Simultaneous Static Loads

15.3.2. The Strength of Technical Structures with Cracks/Deteriorations and Residual Stresses

Chapter 16

Technical Structures under Creep Conditions

16.1. Static Loading under Creep Conditions.

16.2. Calculation of Strength and Duration to Rupture of the Technical Structures under Static Loading in Creep Conditions

16.3. Strength and Life to Rupture Calculation in the Case of Variable Stresses (Fatigue) under Creep Conditions of Technical Structures with Deteriorations and Residual Stresses

Chapter 17

The Critical State in Technical Structures under Loads of Different Nature

Chapter 18

Critical State in Stiffness Calculations

18.1. Critical State in the Case of Technical Structures Undergoing Vibration

18.2. Buckling Cylindrical Shells and Plates

Chapter 19

Pressure Vessels Flange Joints Calculation on the Basis of Principle of Critical Energy

19.1. Introduction

19.2. Loading of Flange Joint Components. Stresses

19.2.1. Bolts Loading

19.2.2. Flange Loading

19.2.3. Stresses in Bolts and Flanges

19.2.4. Stress in the Shell to Which the Flange Is Welded

19.3. Flange Joints Calculation on the Basis of Principle of Critical Energy

19.4. Analysis of the Proposed Calculation Method

Chapter 20

Critical State due to Transitional Regimes

Chapter 21

Equivalent Loadings

21.1. Some Particular Cases of Equivalent Loads

21.2. Strength of Materials Theory Based on the Law of Equivalence of Processes and Phenomena

21.2.1. Loadings with Main Normal Stresses

21.2.2. Loading with Normal Main Stresses and Tangential Stresses

21.3. Comparison of the Energonics Method with Classical Methods based on the Concept of Equivalent Stress

21.4. Equivalent Loads in the Frame of Fracture Mechanics

21.4.1. Introduction

21.4.2. Variables Equivalent to the Concepts of Fracture Mechanics

21.4.3. Variables Equivalent for Deteriorated Structures without Using the Concepts of Fracture Mechanics.

21.5. A Comparison between Methods of Strength Calculation Presented in this Chapter

Chapter 22

Superposition and/or Cumulation of Loadings in the Environment and Living Organisms

22.1. Loading of the Environment or Living Organisms with Chemical or Radioactive Pollutants

22.2. The Action of a Radiation Flux on the Environment or on Living Organisms

22.3. The Action of Specific External Factors on Living Organisms

22.4. Some Cases of the Environment and Living Organisms Deterioration

22.5. Calculation of the Total Participations of Specific Energies with the Superposition of Loads Specific to Living Organisms

Chapter 23

Applications and Numerical Examples for Living Organisms

23.1. The Influence of Background Radioactive Pollution on the Deterioration of Living Organisms and Their Lifetime [95, 96, 98]

23.2. The Influence of Heartbeat Rate on its Lifetime

23.3. The Effect Induced by Superposition of Loadings in the Case of Functional Extrasystoles

23.4. The Effect of Exposing the Living Organism to an Alternating Electric Current

23.4.1. Electromagnetic Disturbances

23.4.2. The Living Organism under the Action of a Single Electric Current of Intensity I

23.4.3. Simultaneous Exposure to Electric Currents, Electric Fields and Magnetic Fields with Different Frequencies

23.4.4. The Effects of Electromagnetic Loads

23.5. The Impact of Emotions upon the Resistance of a Living Organism

23.6. The Body Evaluation before a Surgical Intervention

Conclusion

References

Index

Blank Page.

Notes:

Description based on publisher supplied metadata and other sources.

Description based on print version record.

ISBN:

9798895300114