Search results: Found 6

Listing 1 - 6 of 6
Sort by
Sensors for Ultrasonic NDT in Harsh Environments

Authors: ---
ISBN: 9783039284221 / 9783039284238 Year: Pages: 120 DOI: 10.3390/books978-3-03928-423-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-06-09 16:38:57
License:

Loading...
Export citation

Choose an application

Abstract

In this Special Issue of Sensors, seven peer-reviewed manuscripts appear on the topic of ultrasonic transducer design and operation in harsh environments: elevated temperature, high gamma and neutron radiation fields, or the presence of aggressive chemicals. Motivations for these research and development projects are strongly focused on nuclear power plant inspections (particularly liquid-sodium cooled reactors), and nondestructive testing of high-temperature piping installations. It is anticipated that extensive use of permanently mounted robust transducers for in-service monitoring of petrochemical plants and power generations stations; quality control in manufacturing plants; and primary and secondary process monitoring in the fabrication of engineering materials will soon be made.

Creep and High Temperature Deformation of Metals and Alloys

Authors: ---
ISBN: 9783039218783 9783039218790 Year: Pages: 212 DOI: 10.3390/books978-3-03921-879-0 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering --- Mining and Metallurgy
Added to DOAB on : 2020-01-07 09:08:26
License:

Loading...
Export citation

Choose an application

Abstract

By the late 1940s, and since then, the continuous development of dislocation theories have provided the basis for correlating the macroscopic time-dependent deformation of metals and alloys—known as creep—to the time-dependent processes taking place within the metals and alloys. High-temperature deformation and stress relaxation effects have also been explained and modeled on similar bases. The knowledge of high-temperature deformation as well as its modeling in conventional or unconventional situations is becoming clearer year by year, with new contemporary and better performing high-temperature materials being constantly produced and investigated.This book includes recent contributions covering relevant topics and materials in the field in an innovative way. In the first section, contributions are related to the general description of creep deformation, damage, and ductility, while in the second section, innovative testing techniques of creep deformation are presented. The third section deals with creep in the presence of complex loading/temperature changes and environmental effects, while the last section focuses on material microstructure–creep correlations for specific material classes. The quality and potential of specific materials and microstructures, testing conditions, and modeling as addressed by specific contributions will surely inspire scientists and technicians in their own innovative approaches and studies on creep and high-temperature deformation.

Metal Plasticity and Fatigue at High Temperature

Authors: --- ---
ISBN: 9783039287703 / 9783039287710 Year: Pages: 220 DOI: 10.3390/books978-3-03928-771-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-06-09 16:38:57
License:

Loading...
Export citation

Choose an application

Abstract

In several industrial fields (such as automotive, steelmaking, aerospace, and fire protection systems) metals need to withstand a combination of cyclic loadings and high temperatures. In this condition, they usually exhibit an amount—more or less pronounced—of plastic deformation, often accompanied by creep or stress-relaxation phenomena. Plastic deformation under the action of cyclic loadings may cause fatigue cracks to appear, eventually leading to failures after a few cycles. In estimating the material strength under such loading conditions, the high-temperature material behavior needs to be considered against cyclic loading and creep, the experimental strength to isothermal/non-isothermal cyclic loadings and, not least of all, the choice and experimental calibration of numerical material models and the selection of the most comprehensive design approach. This book is a series of recent scientific contributions addressing several topics in the field of experimental characterization and physical-based modeling of material behavior and design methods against high-temperature loadings, with emphasis on the correlation between microstructure and strength. Several material types are considered, from stainless steel, aluminum alloys, Ni-based superalloys, spheroidal graphite iron, and copper alloys. The quality of scientific contributions in this book can assist scholars and scientists with their research in the field of metal plasticity, creep, and low-cycle fatigue.

New Trends in Recycled Aggregate Concrete

Authors: --- ---
ISBN: 9783039211401 9783039211418 Year: Pages: 280 DOI: 10.3390/books978-3-03921-141-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-08-28 11:21:27
License:

Loading...
Export citation

Choose an application

Abstract

This book is the result of a Special Issue published in Applied Sciences, entitled “New Trends in Recycled Aggregate Concrete"". It identifies emerging research areas within the field of recycled aggregate concrete and contributes to the increased use of this eco-efficient material.Its contents are organised in the following sections: Upscaling the use of recycled aggregate concrete in structural design; Large scale applications of recycled aggregate concrete; Long-term behaviour of recycled aggregate concrete; Performance of recycled aggregate concrete in very aggressive environments; Reliability of recycled aggregate concrete structures; Life cycle assessment of recycled aggregate concrete; New applications of recycled aggregate concrete.

Keywords

reactive power concrete --- shrinkage --- creep --- steel fibre --- model --- compressive strength --- models --- geological nature of aggregates --- quality of aggregates --- concrete --- recycled aggregates --- seismic load --- strain rate --- fiber-reinforced concrete --- dynamic mechanical property --- recycled aggregate quality --- bond strength --- shear behavior --- aggregate interlock mechanism --- size effect --- ready-mixed concrete --- recycled concrete aggregates --- returned concrete --- concrete sludge fines --- soil stabilization --- recycled aggregate --- recycled aggregate concrete --- artificial neural networks --- aggregate characteristic --- input variable --- recycled concrete --- aggregate --- mixture proportioning --- flexural behavior --- recycling --- heavyweight waste glass --- cyclic load --- reinforced concrete member --- recycled aggregate concrete (RAC) --- steel reinforced recycled aggregate concrete (SRRAC) --- elevated temperature --- residual properties --- recycled coarse aggregate concrete --- nylon fiber --- mechanical properties --- permeability --- microstructure --- foam concrete --- cellular concrete --- ceramic foam --- modulus --- crushing --- energy absorbing --- CT --- foam structure --- foam stability --- recycled aggregate --- concrete --- life cycle assessment --- environmental impact --- recycled concrete aggregate --- crumb rubber --- crushed glass --- compressive strength --- tensile splitting strength --- water absorption --- concrete --- aggregates --- fly-ash --- silica fume --- blast-furnace slag --- mechanical properties --- water absorption --- reinforced concrete --- recycled aggregate concrete --- columns --- seismic performance --- numerical analysis --- variable sensitivity --- recycled aggregate --- concrete --- construction waste --- mechanical characteristics --- durable characteristics --- n/a

Advances in Digital Image Correlation (DIC)

Authors: ---
ISBN: 9783039285143 / 9783039285150 Year: Pages: 252 DOI: 10.3390/books978-3-03928-515-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-06-09 16:38:57
License:

Loading...
Export citation

Choose an application

Abstract

Digital image correlation (DIC) has become the most popular full field measurement technique in experimental mechanics. It is a versatile and inexpensive measurement method that provides a large amount of experimental data. Because DIC takes advantage of a huge variety of image modalities, the technique allows covering a wide range of space and time scales. Stereo extends the scope of DIC to non-planar cases, which are more representative of industrial use cases. With the development of tomography, digital volume correlation now provides access to volumetric data, enabling the study of the inner behavior of materials and structures.However, the use of DIC data to quantitatively validate models or accurately identify a set of constitutive parameters remains challenging. One of the reasons lies in the compromises between measurement resolution and spatial resolution. Second, the question of the boundary conditions is still open. Another reason is that the measured displacements are not directly comparable with usual simulations. Finally, the use of full field data leads to new computational challenges.

Keywords

super pressure balloon --- stress concentration --- strain --- non-contact measurement --- digital image correlation --- large deformation --- digital image correlation --- multi-perspective --- single camera --- cross dichroic prism --- earthquake rupture --- fault geometry --- spatiotemporal evolution --- strain gage --- spatial sampling rate --- rupture speed --- slip velocity --- high-speed camera --- experimental-numerical method --- digital image correlation --- finite element method --- static analysis --- arch structures --- fracture process zone --- digital image correlation technique --- acoustic emission technique --- stress intensity factor --- 3D deformation --- digital volume correlation --- optical coherence elastography --- virtual fields method --- layered material --- interior 3D deformation --- digital volumetric speckle photography --- X-ray microtomography --- digital volume correlation --- red sandstone --- woven composite beam --- digital image correlation --- dynamic interfacial rupture --- traction continuity across interfaces --- non-contact video gauge --- measurement --- stress-strain relationship --- uniaxial tensile test --- elevated temperature --- DIC --- initial condition --- image registration --- strain measurement --- copper plate --- underwater impulsive loading --- non-liner dynamic deformation --- 3D digital image correlation --- image correlation --- gradient correlation functions --- laser speckles --- image cross-correlation --- monitoring --- geosciences --- automated systems --- machine learning --- image classification --- image shadowing --- characterization of composite materials --- interlaminar tensile strength --- digital image correlation --- inverse method --- finite element model updating --- Digital image correlation (DIC) --- composite structures --- structural testing --- experimental mechanics --- composite materials --- automated composite manufacturing --- composite inspection --- automated fiber placement (AFP) --- DIC --- traceable calibration --- accuracy --- error --- n/a

Failure Mechanisms in Alloys

Author:
ISBN: 9783039282760 9783039282777 Year: Pages: 476 DOI: 10.3390/books978-3-03928-277-7 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-04-07 23:07:09
License:

Loading...
Export citation

Choose an application

Abstract

The era of lean production and excellence in manufacturing, advancing with sustainable development, demands the rational utilization of raw materials and energy resources, adopting cleaner and environmentally-friendly industrial processes. In view of the new industrial revolution, through digital transformation, the exploitation of smart and sophisticated materials systems, the need of minimizing scrap and increasing efficiency, reliability and lifetime and, on the other hand, the pursuit of fuel economy and limitation of carbon footprint, are necessary conditions for the imminent growth in a highly competitive economy. Failure analysis is an interdisciplinary scientific topic, reflecting the opinions and interpretations coming from a systematic evidence-gathering procedure, embracing various important sectors, imparting knowledge, and substantiating improvement practices. The deep understanding of material/component role (e.g., rotating shaft, extrusion die, gas pipeline) and properties will be of central importance for fitness for purpose in certain industrial processes and applications. Finally, it is hoped and strongly believed that the accumulation of additional knowledge in the field of failure mechanisms and the adoption of the principles, philosophy, and deep understanding of failure analysis process approach will strongly promote the learning concept, as a continuously evolving process leading to personal and social progress and prosperity.

Keywords

impingement --- erosion corrosion --- API 5L-X65 --- flow loop --- wear scar --- creep fatigue --- crack growth --- grain boundary --- hydrogen-assisted cracking --- corrosion --- SOHIC --- cleavage fracture --- cold-working process --- surface-cracking process --- impact toughness --- strength --- low temperatures --- austenitic stainless steels --- pipeline steel --- tensile stress --- corrosion --- potentiodynamic polarization --- EIS --- brass extrusion --- CFD simulation --- extrusion failures --- plastic deformation processing --- finite element analysis --- inverse modeling --- post-necking hardening --- biaxial tensile test --- elevated temperature --- reliability design --- helix upper dispenser --- fracture --- parametric accelerated life testing --- faulty designs --- metal components --- fracture mechanisms --- fractography --- fracture mechanics --- quality improvement --- finite element modeling --- nanocrystalline materials --- elastic moduli --- yield strength --- cast duplex stainless steels --- thermal aging --- tensile deformation --- spinodal decomposition --- smooth particle hydrodynamics --- Titanium alloy machining --- numerical simulation --- cutting forces --- chip formation --- fracture --- iterative FEM Method --- GISSMO Model --- softening --- macroscopic strength criterion --- isotropic metals --- fracture plane --- linear Mohr–Coulomb criterion --- failure mechanism --- W-30Cu --- microstructure homogeneity --- dynamic compression strength --- ductility --- failure mechanism --- slow-rate machining --- chip formation --- shape --- temperature --- microhardness HV --- creep --- steam reforming --- carbides --- G-phase --- aging --- cast reformer tubes --- hot stamping --- press hardening --- austenitizing furnace --- high temperature fatigue --- thermal distortion --- conveying system --- refractory steels --- furnace component failure --- ductile irons --- tensile tests --- mechanical properties --- constitutive equations --- quality assessment --- shear angle --- chip root --- shape --- built-up edge --- slow-rate machining --- convection tubes --- AISI 304 stainless steel --- failure analysis --- sensitization --- bake hardening --- dent resistance --- failure study --- polynomial regression --- yield strength --- automotive steels --- reformer tubes --- HP-Mod --- failure analysis --- creep --- surface modification techniques --- degradation of protective layers --- lubrication --- nitrocarburizing --- hardfacings --- thermal-sprayed coatings --- finite element analysis --- forward slip prediction --- strip marking method --- multilinear regression --- micro flexible rolling --- thickness transition area --- 3D Voronoi modelling --- automotive --- 6063 Alloy --- EBSD --- bendability --- fractography --- modeling --- texture --- tribological properties --- wear --- surface treatment --- self-equalizing bearing --- n/a

Listing 1 - 6 of 6
Sort by
Narrow your search

Publisher

MDPI - Multidisciplinary Digital Publishing Institute (6)


License

CC by-nc-nd (6)


Language

eng (3)

english (3)


Year
From To Submit

2020 (4)

2019 (2)