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Topic

Creep

About: Creep is a(n) research topic. Over the lifetime, 48630 publication(s) have been published within this topic receiving 772872 citation(s).


Papers
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Book
01 Dec 1960
Abstract: INTRODUCTION. Ceramic Processes and Products. CHARACTERISTICS OF CERAMIC SOLIDS. Structure of Crystals. Structure of Glasses. Structural Imperfections. Surfaces, Interfaces, and Grain Boundaries. Atom Mobility. DEVELOPMENT OF MICROSTRUCTURE IN CERAMICS. Ceramic Phase Equilibrium Diagrams. Phase Transformation, Glass Formation and Glass--Ceramics. Reactions with and between Solids. Grain Growth. Sintering and Vitrification. Microstructure of Ceramics. PROPERTIES OF CERAMICS. Thermal Properties. Optical Properties. Plastic Deformation, Viscous Flow and Creep. Elasticity, Anelasticity and Strength. Thermal and Compositional Stresses. Electrical Conductivity. Dielectric Properties. Magnetic Properties.

6,594 citations

Journal ArticleDOI
Abstract: The mechanical properties of nanocrystalline materials are reviewed, with emphasis on their constitutive response and on the fundamental physical mechanisms. In a brief introduction, the most important synthesis methods are presented. A number of aspects of mechanical behavior are discussed, including the deviation from the Hall–Petch slope and possible negative slope, the effect of porosity, the difference between tensile and compressive strength, the limited ductility, the tendency for shear localization, the fatigue and creep responses. The strain-rate sensitivity of FCC metals is increased due to the decrease in activation volume in the nanocrystalline regime; for BCC metals this trend is not observed, since the activation volume is already low in the conventional polycrystalline regime. In fatigue, it seems that the S–N curves show improvement due to the increase in strength, whereas the da/dN curve shows increased growth velocity (possibly due to the smoother fracture requiring less energy to propagate). The creep results are conflicting: while some results indicate a decreased creep resistance consistent with the small grain size, other experimental results show that the creep resistance is not negatively affected. Several mechanisms that quantitatively predict the strength of nanocrystalline metals in terms of basic defects (dislocations, stacking faults, etc.) are discussed: break-up of dislocation pile-ups, core-and-mantle, grain-boundary sliding, grain-boundary dislocation emission and annihilation, grain coalescence, and gradient approach. Although this classification is broad, it incorporates the major mechanisms proposed to this date. The increased tendency for twinning, a direct consequence of the increased separation between partial dislocations, is discussed. The fracture of nanocrystalline metals consists of a mixture of ductile dimples and shear regions; the dimple size, while much smaller than that of conventional polycrystalline metals, is several times larger than the grain size. The shear regions are a direct consequence of the increased tendency of the nanocrystalline metals to undergo shear localization. The major computational approaches to the modeling of the mechanical processes in nanocrystalline metals are reviewed with emphasis on molecular dynamics simulations, which are revealing the emission of partial dislocations at grain boundaries and their annihilation after crossing them.

3,425 citations

Book
14 Dec 1993
Abstract: Mechanical Tests and Polymer Transitions * Elastic Moduli * Creep and Stress Relaxation * Dynamical Mechanical Properties * Stress-Strain Behaviour and Strength * Other mechanical Properties * Particulate-Filled Polymers * Fiber- Filled Composites and Other Composites.

3,083 citations

Reference BookDOI
22 Nov 2017
Abstract: "Interfacial Thermodynamics Molecular Interpretations Interfacial and Surface Tensions of Polymer Melts and Liquids Contact Angles of Liquids on Solid Polymers Surface Tension and Polarity of Solid Polymers Wetting of High-Energy Surfaces Dynamic Contact Angles and Wetting Kinetics Experimental Methods for Contact Angles and Interfacial Tensions Modifications of Polymer Surfaces: Mechanisms of Wettability and Bondability Improvements Adhesion: Basic Concept and Locus of Failure Formation of Adhesive Bond Weak Boundary Layers Effect of Internal Stress and Bond Strength Fracture of Adhesive Bond Fundamentals of Fracture Mechanics Analysis and Testing of Adhesive Bonds Creep, Fatigue, and Environmental Effects Creep and Fatigue of Adhesive Joints Environmental Effects Appendix I: Calculation of Surface Tension and Its Non-polar and Polar Components from Contact Angles By the Harmonic-Mean and the Geometric-Mean Methods Appendix II: Unit Conversion Tables "

2,390 citations

Book
01 Oct 1982
Abstract: Deformation-mechanism maps: the plasticity and creep of metals and ceramics , Deformation-mechanism maps: the plasticity and creep of metals and ceramics , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

2,276 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202284
20211,566
20201,584
20191,561
20181,566
20171,508