 | Freger G.E. Spirally anisotropic composites / Freger G.E., Kestelman V.N., Freger D.G. - Berlin; Heidelberg: Springer, 2004. - xii, 310 p.: ill. - (Springer series in materials science; 76). - ISBN 3-54021188-8; ISSN 0933-033X
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1. Hybridization and Spatial Reinforcement
of Composite Materials ....................................... 1
1.1. Classification of Hybrid Materials ......................... 5
1.2. Hybrid Effect in Multicomponent Materials .................. 6
1.3. Theoretical and Experimental Research
on Hybrid Composites ...................................... 11
1.4. Properties of Hybrid Composite Materials .................. 14
1.5. Application of Hybrid Composite Materials ................. 16
1.6. Spatial Reinforcement of Composites ....................... 22
1.7. Combination of Hybridization and Spatial Reinforcement .... 24
1.8. Conclusions ............................................... 26
2. Major Principles of Developing Material Structures
with Hybrid Spirally Reinforced Filler ...................... 27
2.1. Analysis of Structural Schemes of Materials ............... 27
2.2. Filling Degree of the Material with Spirally
Reinforced Filler ......................................... 30
2.3. Structural Analysis of Composites with Spirally
Reinforced Filler ......................................... 35
2.3.1. Material Structure at High Filling Degree
of the Element Core ................................ 36
2.3.2. Structural Features of Material with
a Slightly Filled Spirally Reinforced Element ...... 39
2.3.3. Calculation of Size Limits of Spirally
Reinforced Element ................................. 41
2.3.4. Applicability Limits of Obtained Dependencies ...... 45
2.4. Inner Stress in Composites with Spirally Reinforced
Filler .................................................... 49
2.5. Design of Material Structure with Spirally
Reinforced Filler ......................................... 54
2.6. The Choice of a Representative Element
of the Material Structure ................................. 57
2.7. Conclusions ............................................... 59
3. Stress-Strain State in Composites Based on Hybrid
Spirally Reinforced Fillers Under Transverse Loading ........ 61
3.1. Statement of the Problem .................................. 62
3.2. Determination of Reduced Elastic Characteristics .......... 66
3.3. Study of the Material Model with Orthotropic
and Variable Across Thickness Layer Properties ............ 68
3.3.1. Investigation of Interlayer Inhomogeneity Effect
on the Composite Stress State ...................... 76
3.3.2. Numerical Analysis ................................. 80
3.4. Stress-state Analysis of Composites Filled
with Thin Isotropic Layers of Auxiliary Reinforcement ..... 86
3.4.1. Numerical Computation of Low-filled Material ....... 91
3.4.2. Composite Design with Allowance for Filling
Degree ............................................. 99
3.5. Investigation of the Stress-Strain State of a Composite
with Two Intermediate Layers ............................. 104
3.5.1. Numerical Computation of Low-filled
Material Model with Spirally Reinforced
Elements .......................................... 106
3.5.2. Material Model Design with Allowance for
Filling ........................................... 109
3.6. Conclusions .............................................. 113
4. Stress-Strain State of the Composite
Based on Spirally Reinforced Filler Under Loading
in the Direction of Reinforcement .......................... 115
4.1. Composite Tension in the Reinforcing Direction ........... 115
4.2. Boundary Conditions and Determination
of Elastic Constants ..................................... 117
4.3. Longitudinal Shear of the Composite Structure
Based on Spirally Reinforced Filler ...................... 119
4.4. Boundary Conditions and Determination
of Elastic Constants at a Longitudinal Shear ............. 122
4.5. Determination of Elastic Constants of the Composite
Based on Spirally Reinforced Filler Under Loading
in the Direction of the Main Reinforcement ............... 124
4.6. Optimization of Elastic Properties and
Geometrical Parameters of the Composite
Based on Spirally Reinforced Filler ...................... 131
4.7. Conclusions .............................................. 139
5. Description of Production Technology and
Physico-Mechanical Properties of Composites
Based on Spirally Reinforced Fillers ....................... 141
5.1. Stages of Material Production Technology ................. 141
5.1.1. Technological Peculiarities and Basic
Process Parameters of Spiral Winding .............. 141
5.1.2. Computation of Technological Process
Parameters ........................................ 144
5.1.3. Production Equipment for Materials
with Spirally Reinforced Fillers .................. 152
5.2. Choice of Testing Methods, Preparation of Samples
and Processing of Experimental Results ................... 155
5.3. The Effect of Major Structural and Technological
Parameters on Mechanical Characteristics of Composites ... 157
5.4. Study of Mechanical Characteristics of Materials
as Dependent on the Type of the Main and Auxiliary
Reinforcement ............................................ 168
5.5. The Analysis of Mechanic Characteristics of
Coal-Plastics Based on Spirally Reinforced Fillers ....... 175
5.5.1. The Analysis of Elastic Characteristics ........... 176
5.5.2. The Analysis of Strengthening Characteristics ..... 178
5.5.3. The Analysis of the Mechanic Characteristics
Research Results .................................. 181
5.6. The Analysis of Fracture Processes in Composites
with Spirally Reinforced Filler .......................... 182
5.7. Conclusions .............................................. 193
6. Design of Composite Spirally Reinforced Rods ............... 195
6.1. Selection of the Mathematical Model ...................... 197
6.2. Calculation of Loading Conditions ........................ 200
6.3. Rigid Contact Conditions ................................. 201
6.4. Solution of a Spatial Problem for an Inhomogeneous
in Radial Direction Rod .................................. 207
6.5. Reduction of the Elastic Theory Problem to Solution
of a System of Algebraic Equations ....................... 214
6.6. Estimation of Effective Characteristics .................. 217
6.7. Conclusions .............................................. 217
7. The Effect of Structural and Geometrical Parameters
on Rod Properties .......................................... 219
7.1. Principles of Experimental Investigations
of Rod Elements .......................................... 219
7.1.1. Preparation and Manufacture of the Samples ........ 219
7.1.2. Testing Procedure ................................. 220
7.2. The Analysis of the Auxiliary Effect on SSS of the Rod
Under Compression ........................................ 221
7.3. The Effect of Technological Factors on Properties
of the Rod Elements ...................................... 225
7.3.1. The Analysis of the Winding Fiber Tension
Force Effect ...................................... 226
7.3.2. Residual Temperature-induced Stresses
in the Rod Element ................................ 226
7.3.3. The Effect of the Main Material Twisting
on SSS and Warping of Rod Elements ................ 229
7.4. The Effect of Rod Element Structure on the
Stress strain Field Under Compression .................... 231
7.5. The Efficient Characteristics of the Material
as Dependent on Parameters of Spirally Reinforced
Rods ..................................................... 239
7.6. Conclusions .............................................. 242
8. Optimal Design of Hybrid Spirally Reinforced Rods .......... 243
8.1. Statement of the Problem of Optimal Design ............... 243
8.1.1. Choice of the Optimization Criterion .............. 243
8.1.2. The Control Parameter Vector Limitations .......... 247
8.2. Modification of the Random Search Method ................. 248
8.3. Estimation of the Optimal Structure
of Thermally Stable Rods ................................. 250
8.4. Optimization of Compressed Spirally Reinforced
Rod Elements ............................................. 251
8.5. Conclusions .............................................. 253
9. Application of Composites Based on Spirally
Reinforced Fillers and the Spiral Reinforcement
Procedure in Design Units .................................. 255
9.1. Rod-type Products Based on Spirally Reinforced Fillers ... 255
9.1.1. Methods of Producing Rod-type Wares ............... 258
9.1.2. Elaboration of the Technological Process
for the Spiral Reinforcement of Carbon
Plastic Rods ...................................... 259
9.1.3. Study of the Characteristics of Carbon-
plastic Spirally Reinforced Rods .................. 261
9.1.4. Metal-plastic Rods for Measuring Units ............ 264
9.2. Composites with the Spirally Reinforced Filler
in Strengthening Elements of Load-bearing Units .......... 265
9.2.1. Semiproducts from Composites Based on
Spirally Reinforced Fillers ....................... 267
9.2.2. Elaboration of the Manufacturing Process
for Reinforcing Elements .......................... 272
9.2.3. Experimental Results of Mechanical
Characteristics of Stringers ...................... 276
9.3. Application of Composites
Based on Spirally Reinforced Fillers in Design Casings ... 279
9.4. Technical and Cost-effectiveness of Applying
the Technology and Materials with Spirally
Reinforced Fillers ....................................... 283
9.5. Conclusions .............................................. 284
General Conclusions and Recommendations ....................... 287
Addendum ...................................................... 289
References .................................................... 295
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