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020 _a9781394255627
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024 7 _a10.1002/9781394255627
_2doi
035 _a(OCoLC)1414472249
_z(OCoLC)1410593562
_z(OCoLC)1476760995
035 9 _a(OCLCCM-Owned)1414472249
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041 _aeng
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050 4 _aTA407
_b.L47 2023
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082 0 0 _223
_a620.1123
100 1 _aLeroy, Maurice.
_eauthor.
245 1 0 _aRheology, physical and mechanical behavior of materials
_n1 :
_pphysical mechanisms of deformation and dynamic behavior /
_cMaurice Leroy.
250 _a1st ed.
264 1 _aLondon :
_aHoboken, NJ ;
_bJohn Wiley & Sons,
_c2023.
264 4 _c©2023.
300 _a1 online resource (345 pages)
336 _atext
_btxt
_2rdacontent
337 _acomputer
_bc
_2rdamedia
338 _aonline resource
_bcr
_2rdacarrier
490 0 _aMechanical engineering and solid mechanics series
504 _aIncludes bibliographical references and index.
505 0 _aTable of Contents Preface xi Chapter 1 Dynamic Plasticity: Dislocations 1 1.1 Introduction: how to describe plasticity? 1 1.2 Strain speed: ε (γ for shearing) 7 1.3 The microstructural mechanisms of plasticity 16 Chapter 2 Obstacles and Mechanisms of Crossings 59 2.1 Obstacles 60 2.2 Nature and resistance of obstacles 61 2.3 Example of measuring dislocation speeds 62 2.4 Microstructural mechanisms of the deformation rate 67 2.5 Mechanisms due to obstacles: hardening mechanisms 68 2.6 Athermal mechanism of the movement of a dislocation 116 2.7 Thermally activated mechanism of the movement of a dislocation 122 2.8 The viscous friction mechanism 129 Chapter 3 Dynamic Flows for Monocrystals and Polycrystals 137 3.1 Type of monocristal and polycrystal dynamic shear test samples (anisotropy and isotropy at high speeds) 138 3.2 The tensor of the shock stresses 139 3.3 Study of strain on a polycrystal 140 3.4 Dynamic flows by electromagnetic shocks, polycrystalline aluminum A5 140 3.5 The case of six polycrystals 142 3.6 The case of monocrystals 143 3.7 Models for CFCs 147 3.8 Dynamics of flows shown using an ultra-fast camera 152 3.9 Viscoplasticity 161 3.10 References for viscoplasticity 170 Chapter 4 Limits to Static and Dynamic Formability 173 4.1 Plastic instability 173 4.2 Forming by pressing 181 4.3 Damage: area between necking and fracture, the case between Forming Limit Curves (FLCs) and Fracture Forming Limit Curves (FFLCs) 190 4.4 Limit of the formability during necking (FLCs) and during fracture (FFLCs): influence of the strain rate 196 Chapter 5 Dynamic Resistance to Mechanical Shocks 219 5.1 Shock stresses 219 5.2 Resilience test 227 5.3 Typical loads, stress waves 251 5.4 Dynamic tests, Hopkinson technique, laws of behavior 264 Appendix A Primary Times of Mechanisms 289 References 313 Index 319
520 _aThis book studies the flow of materials and the influence of strain rates on the relationship between imposed stresses and the dynamic deformations obtained. It provides applications for shaping, molecular molding, shrink-fit assembly and welding, including details of the various specific processes for implementation at high strain rates, illustrated by numerous industrial examples. Rheology, Physical and Mechanical Behavior of Materials 1 presents analyses of plasticity mechanisms at microscopic and macroscopic scales, and of the various forms of stressstrain behavior laws according to working speeds, mechanisms, athermics, viscoplasticity and formability limits at types and speeds of change. It is aimed at researchers involved in the mechanics of deformable media, as well as industrial design and manufacturing departments.
545 0 _aAbout the Author Maurice Leroy is a lecturer and professor at the University of Nantes, France, as well as director of the Composite and Metallic Formations research laboratory at the IUT. He was instrumental in the creation of France’s first Materials Science and Engineering department.
588 _aDescription based on online resource; title from digital title page (viewed on April 09, 2024).
650 0 _aMaterials
_xMechanical properties.
_0http://id.loc.gov/authorities/subjects/sh2007002252
650 0 _aMaterials
_xElastic properties.
_0http://id.loc.gov/authorities/subjects/sh2013001460
650 0 _aRheology.
_0http://id.loc.gov/authorities/subjects/sh85113619
655 0 _aElectronic books.
856 4 0 _uhttps://onlinelibrary.wiley.com/doi/book/10.1002/9781394255627
_yFull text is available at Wiley Online Library. Click here to view
880 8 _6505-00/(S
_a4.2.2. Parameters influencing instability: influences of the work hardening n and the anisotropy r -- 4.2.3. Pressing and formability in bending of sheets, shaping of elliptical bulbs -- 4.3. Damage: area between necking and fracture, the case between Forming Limit Curves (FLCs) and Fracture Forming Limit Curves (FFLCs) -- 4.3.1. Definition -- 4.3.2. Damage measurement D -- 4.3.3. Large strains and damage -- 4.3.4. Stress curve, strain of a 30 CD4 steel that has undergone a perlite globularization annealing (as given by Gathouffi (1984)) -- 4.4. Limit of the formability during necking (FLCs) and during fracture (FFLCs): influence of the strain rate -- 4.4.1. Types of strain -- 4.4.2. Comparison of FLC by : shock by electronic action in the case of aluminum alloys -- 4.4.3. Influence of strain rates on FLCs: static and dynamic formability -- 4.4.4. Metals studied -- 4.4.5. Strain trajectories: change of ε1 under ε2 -- comparison of low and high speeds -- 4.4.6. Comparison of the values for necking Z and fracture R -- 4.4.7. Change in necking -- 4.4.8. Change in fracture -- 4.4.9. Change between necking and fracture -- 4.4.10. Examples in magnetoforming and electro-hydroforming -- Chapter 5. Dynamic Resistance to Mechanical Shocks -- 5.1. Shock stresses -- 5.1.1. Energy aspects: momentum, kinetic energy, impulse -- 5.1.2. Comparison between stress levels in static and dynamic loads -- 5.2. Resilience test -- 5.2.1. Impact by a simple pendulum -- 5.2.2. Stress from polar shock impacts -- 5.2.3. Shock with rebound, coefficient of restitution, energy losses -- 5.2.4. Effect of resistance to movement, speed and stress upon impact -- 5.2.5. Resistant force proportional to the square of the instantaneous speed v2 -- 5.2.6. Elastoplastic resistance to impact and deformation of a solid -- 5.3. Typical loads, stress waves.
942 _2ddc
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