MECHANICS PRINCIPLE OF INTERFACE-TYPE LOESS LANDSLIDE (THE SECOND EDITION)
MECHANICS PRINCIPLE OF INTERFACE-TYPE LOESS LANDSLIDE (THE SECOND EDITION)
Li Shuanhu, Li Chi
Inner Mongolia University of Technology
Copyright © 2025 by Cayley Nielson Press, Inc.
ISBN: 978-1-957274-22-5
Cayley Nielson Press Scholarly Monograph Series Book Code No.: 215-1-1
US$168.50
Preface
In recent years, the loess landslides in the Loess Plateau region are at a high incidence period, and the number and scale of landslides are in a growing trend. Interfacial loess landslides are a type of loess landslides, which are widely distributed in the Loess Plateau region. The failure mechanism and instability mode of its sliding surface are relatively special. Therefore, the study of interface type loess landslide disasters is not only a scientific demand, but also a demand for social and economic development. Currently, scholars in relevant fields are gradually paying attention to it.
The current research theory for interfacial loess landslides is relatively lagging behind. Therefore, this book provides a detailed theoretical study on the failure mechanism and calculation model of interface type loess landslides, and provides a clear theoretical derivation process and application methods. The research process involves interdisciplinary research in soil mechanics, elastic-plastic mechanics, fracture mechanics, structural mechanics, theoretical mechanics, and other disciplines, which not only reflects the multi-angle nature of research issues, but also reflects the multi-scale nature of research issues.
This book proposes a soil yield failure mode with fracture characteristics based on traditional soil yield failure criteria by studying the failure mechanism of sliding surface soil. The physical significance of sliding zone failure is explained from the perspective of fracture mechanics, and a fracture progressive failure mode of soil landslides is proposed based on the traditional slice progressive failure mode. Based on the principle of fracture mechanics, a mechanical equilibrium equation based on J integral is presented. In the interface type loess landslide with low water content or high consolidation stress, it is feasible and applicable to use the fracture progressive failure mode to study soil failure, and its physical significance is clearer and its application prospects are better.
Based on the theory of asperity, an instability model of interface type loess landslides is established. The asperity theory and progressive fracture failure mode jointly solve the theoretical problems of interface type loess landslides, and provide direct theoretical support for the design of monitoring and warning schemes for landslides, which has important engineering value.
This academic monograph will be reprinted (second edition) in January 2025, with minor revisions based on the first edition. The research content is supported by the following funds:National Natural Science Foundation of China (NO. 12362034); Talent Project of Inner Mongolia Autonomous Region (NO. DC2300001439)；Talent Program of Inner Mongolia University of Technology (NO. DC2200000913).
Li Shuanhu, Li Chi
Hohhot, Inner Mongolia Autonomous Region, China
January 10, 2025
Contents
1 General Mechanical Calculation of Interface-Type Loess Landslide 1
1.1 Introduction 1
1.2 Limit Equilibrium Analysis of Interface-Type Loess Landslide 1
1.3 Yield Limit of Interface-Type Loess Landslide 3
1.4 Progressive Damage Model of Interface-Type Loess Landslides 5
1.5 Chapter summary 8
2 Asperity Theoretical Model of Interface-Type Loess Landslide 10
2.1 Introduction 10
2.2 Basic Concepts of Asperity Theory 10
2.3 Mechanical Characteristics of Asperities in Interface-Type Loess Landslides 12
2.4 Asperity Classification in Interface-Type Loess Landslides 15
2.5 Chapter Summary 16
3 Fracture Failure Characteristics of Interface-Type Loess Landslide 18
3.1 Introduction 18
3.2 Failure Criterion of Interface-Type Loess Landslide 18
3.3 Asperity Failure Mode of Interface-Type Loess Landslide 20
3.4 Fracture Progressive Damage of Interface-Type Loess Landslides 22
3.5 Chapter Summary 24
4 Fracture Mechanics Analysis of Asperity in Interface-Type Loess Landslide 25
4.1 Introduction 25
4.2 Linear Elastic Fracture Mechanism of Loess Landslide 25
4.2.1 Fracture Strength Factor 𝑲 26
4.2.2 Fracture Energy Release Rate 𝑮 30
4.3 Nonlinear Elastic Fracture Mechanism of Loess Landslide 31
4.3.1 Crack opening displacement theory 𝑪𝑶𝑫 32
4.3.2 𝑱-Integral Theory of Shear Fracture 33
4.3.3 𝑱-Integral Equilibrium Equation of Shear Sliding Zone 36
4.3.4 𝑱-Integral Equilibrium Equation of Stretch Sliding Zone 39
4.4 Chapter Summary 42
5 𝑱-Integral Starting Conditions for Different Failure Modes of Interface-Type Loess Landslides 43
5.1 Introduction 43
5.2 J-Integral Equilibrium Equation of Tractive Loess Landslide 43
5.3 J-Integral Equilibrium Equation of Pushing Loess Landslide 49
5.4 J-Integral Equilibrium Equation of Tensile Loess Landslide 52
5.5 Chapter Summary 55
6 Mechanical Equilibrium Equations of Asperity in Interface-Type Loess Landslides 57
6.1 Introduction 57
6.2 Mechanical Solution of the Limit Length Lc of the Sliding Belt 57
6.3 Mechanical Solution of the Length ω of the Tip Region 59
6.4 Chapter Summary 63
7 Limit Length of Sliding Zone of Interface-Type Loess Landslide with Different Asperities 64
7.1 Introduction 64
7.2 Fluctuating Asperity 64
7.3 Critical Asperity 66
7.4 Structural Asperity 68
7.5 Composite Asperity 69
7.6 Chapter Summary 71
8 Combination Form and Calculation Scheme of Asperity in Interface-Type Loess Landslide 72
8.1 Introduction 72
8.2 Two-Dimensional Monomer Combined Asperity 72
8.3 Two-Dimensional Primary and Secondary Combination Asperity 75
8.4 Three-Dimensional Combined Asperity 79
8.5 Chapter Summary 88
9 Applicability Analysis of Asperity Theory in Interface-Type Loess Landslide 89
9.1 Introduction 89
9.2 Mechanical Basis of Asperity Theory 89
9.3 Application Scheme of Asperity Theory 91
9.4 Chapter Summary 93
References 94
Readership
This book should be useful for students, scientists, engineers and professionals working in the areas of optoelectronic packaging, photonic devices, semiconductor technology, materials science, polymer science, electrical and electronics engineering. This book could be used for one semester course on adhesives for photonics packaging designed for both undergraduate and graduate engineering students.
