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Tesis sobre el tema "Shear Strain Rate"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 27 de julio de 2025

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1

Pani´c, Nebojsa. "High strain rate-induced failure in steels at high shear strains." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/MQ45106.pdf.

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2

Bergström, Jonathan, and Christoffer Åhman. "Shear strain rate dependency of expanded polystyrene foam." Thesis, KTH, Hållfasthetslära (Inst.), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254623.

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3

Jung, Byoung Chan. "Modeling of strain rate effects on clay in simple shear." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/3962.

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The objective of this research is the development of a new constitutive model to describe the behavior of cohesive soils under time dependent loading. In the work presented here, the modified SIMPLE DSS model is expanded to account for the effects of strain rate on clays in simple shear conditions. The response of clay soils is highly dependent on the rate of strain for both effective stress path and stress-strain behavior. The undrained shear strength is strongly influenced by strain rate both in monotonic and cyclic simple shear tests. Nevertheless, the few available experimental results cov

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4

Francsis, Matthew Keegan. "Piezometry and Strain Rate Estimates Along Mid-Crustal Shear Zones." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32170.

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Dynamically recrystallized quartz microstructure and grainsize evolution along mid-crustal shear zones allows for the estimation of tectonic driving stresses and strain rates acting in the mid-crust. Quartz-rich tectonites from three exhumed mid-crustal shear zones, the Main Central Thrust (MCT; Sutlej valley, NW India), South Tibetan Detachment System (STDS; Rongbuk valley, S Tibet), and Moine thrust (NW Scotland), were analyzed. Deformation temperatures estimated from quartz microstructural and petrofabric thermometers indicate steep apparent thermal gradients (80â 420 °C/km) across 0

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5

Deshpande, Nitin Ravichandran G. "An experimental investigation of high-shear-strain-rate behavior of metals /." Diss., Pasadena, Calif. : California Institute of Technology, 1999. http://resolver.caltech.edu/CaltechETD:etd-02062008-080229.

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6

Umberger, Pierce David. "Modeling the High Strain Rate Tensile Response and Shear Failure of Thermoplastic Composites." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23846.

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The high strain rate fiber direction tensile response of Ultra High Molecular Weight Polyethylene (UHMWPE) composites is of interest in applications where impact damage may occur. This response varies substantially with strain rate. However, physical testing of these composites is difficult at strain rates above 10^-1/s. A Monte Carlo simulation of composite tensile strength is constructed to estimate the tensile behavior of these composites. Load redistribution in the vicinity of fiber breaks varies according to fiber and matrix properties, which are in turn strain rate dependent. The dis

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7

Chen, Hsi-Ching B. "Shear localization in high-strain-rate deformation of inert and reactive porous materials /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1997. http://wwwlib.umi.com/cr/ucsd/fullcit?p9732695.

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8

Penumadu, Dayakar. "Strain rate effects in pressuremeter testing and neural network approach for soil modeling." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/19007.

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9

McLoughlin, Justin. "A novel in vitro shear device for inducing high strain rate deformation on neural cell cultures." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16011.

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10

Harris, Matthew Bradley. "Elucidating the Mechanisms of Rate-Dependent Deformation at Ambient Temperatures in a Model Metallic Glass." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6145.

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In this work, the Shear Transformation Zone (STZ) dynamics model is adapted to capture the transitions between different regimes of flow serration in the deformation map of metallic glass. This was accomplished by scaling the STZ volume with a log-linear fit to the strain rate, and also adjusting the activation energy of an STZ with a log-linear fit to maintain constant yield strength at differing strain rates. Twelve simulations are run at each of six different strain rates ranging from 10-5 to 100 s-1, and statistics are collected on simulation behavior and shear band nucleation and propagat

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11

Macdonald, Neil. "Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538737/.

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High entropy alloys (HEAs) are a relatively new class of solid solution alloys that contain multiple principal elements to take advantage of their high configurational entropy, sluggish diffusion, lattice distortion, and the cocktail effect. In recent development, work hardening mechanisms known as twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) have been found active in Al0.3CoCrFeNi (molar fraction) and Fe50Mn30Co10Cr10 (at %) HEA compositions. Friction-stir processing was done to increase the mechanical properties and improve the microstructure of the alloys

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12

Al-Ghanem, Abdulhakim M. F. "AN EVALUATION OF SELECTED TEST VARIABLES ON STRAIN RATE FOR DRAINED TRIAXIAL TESTING ON TAILINGS MATERIALS (SOIL MECHANICS)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275399.

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13

Rattazzi, Dean J. "Analysis of Adiabatic Shear Banding in a Thick-Walled Steel Tube by the Finite Element Method." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/36827.

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The initiation and propagation of adiabatic shear bands is analyzed numerically for an impulsively loaded thick-walled steel tube. A circumferential V-notch located at the outer surface of the center of the tube provides a stress concentration. The material is modeled as strain hardening, strain-rate hardening and thermal softening. The dynamic loading conditions considered are pure torsion, axial pressure combined with torsion, and internal pressure combined with torsion. Because of the stress concentration, a shear band will first initiate in an element adjoining the notch tip and propagate

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14

Gardner, Kevin Alexander. "Experimental Techniques for Shear Testing of Thin Sheet Metals and Compression Testing at Intermediate Strain Rates." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366199322.

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15

Deshpande, Yogesh. "Quasi-static and Dynamic Mechanical Response of T800/F3900 Composite in Tension and Shear." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1525276843674052.

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16

Plöckl, Marina [Verfasser]. "Effect of Strain Rate on the Tensile, Compressive, and Shear Response of Carbon-Fiber-Reinforced Thermoplastic Composites / Marina Plöckl." München : Verlag Dr. Hut, 2019. http://d-nb.info/1184090637/34.

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17

Gurney, Emily Oskin Michael. "Camp Rock fault slip rate and folding of the Lenwood anticline contributions to eastern California shear zone strain accumulation /." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2008. http://dc.lib.unc.edu/u?/etd,1813.

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Thesis (M.S.)--University of North Carolina at Chapel Hill, 2008.<br>Title from electronic title page (viewed Dec. 11, 2008). ". in partial fulfillment of the requirements for the degree of Master of Science in the Department of Geological Sciences." Discipline: Geology; Department/School: Geological Sciences.

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18

Garner, Michael Paul. "Loading Rate Effects on Axial Pile Capacity in Clays." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2016.pdf.

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19

Srinivasan, Kiran. "Experimental determination of strain rate and flow stress in the primary shear zone while machining AISI 4340 and Ti-6AL-4V." Thesis, Wichita State University, 2010. http://hdl.handle.net/10057/3704.

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Metal cutting subjects the material being cut to high strain rates (103 -106/s) and strains>100% within the primary shear zone (PSZ). This thesis is aimed at quantitative measurement of the strain, strain rate and flow stress in the PSZ in order to provide data that can be used to verify and improve high strain rate material models. An experimental study of the cutting forces, chip thickness, and velocity fields in the PSZ, has been carried out during the cutting of AISI 4340 steel in three different tempers; hot rolled steel, hardness 18HRc, referred to as AISI 4340HR; hot rolled steel with a

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20

Hartmann, Christoph [Verfasser], Wolfram [Akademischer Betreuer] Volk, den Boogaard Ton [Gutachter] van, and Wolfram [Gutachter] Volk. "Spatio-temporal optical flow methods for process analysis : Robust strain, strain rate, and crack propagation measurement in shear cutting / Christoph Hartmann ; Gutachter: Ton van den Boogaard, Wolfram Volk ; Betreuer: Wolfram Volk." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1240832680/34.

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21

Plöckl, Marina [Verfasser], Klaus [Akademischer Betreuer] Drechsler, Klaus [Gutachter] Drechsler, and Travesa Albert [Gutachter] Turon. "Effect of Strain Rate on the Tensile, Compressive, and Shear Response of Carbon-Fiber-Reinforced Thermoplastic Composites / Marina Plöckl ; Gutachter: Klaus Drechsler, Albert Turon Travesa ; Betreuer: Klaus Drechsler." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1181946778/34.

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22

Low, Han Eng. "Performance of penetrometers in deepwater soft soil characterisation." University of Western Australia. School of Civil and Resource Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0008.

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Offshore developments for hydrocarbon resources have now progressed to water depths approaching 2500 m. Due to the difficulties and high cost in recovering high quality samples from deepwater site, there is increasing reliance on in situ tests such as piezocone and full-flow (i.e. T-bar and ball) penetration tests for determining the geotechnical design parameters. This research was undertaken in collaboration with the Norwegian Geotechnical Institute (NGI), as part of a joint industry project, to improve the reliability of in situ tests in determining design parameters and to improve offshore

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23

Draheim, Angus. "The influence of the velocity of constrained shear loading on the fracture resistance of the osteochondral region." Thesis, Queensland University of Technology, 2001. https://eprints.qut.edu.au/36157/1/36157_Draheim_2001.pdf.

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There is an increase in participation levels in sporting activities, paiticularly of the high intensity variety. With this comes an increase in joint injmies. Subchondral and interfacial tidemark injmies (osteochondral fracture) caused by high intensity activities as well as motor vehicle injures also continue to cont1ibute significantly to such joint injuries. The rate of loading is a significant contributing factor in type of injury. It is therefore important, for injury prevention and health management reasons, to establish loading rates that present a high risk of osteochondral fracture

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24

Guan, Youliang. "Crack path selection and shear toughening effects due to mixed mode loading and varied surface properties in beam-like adhesively bonded joints." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/24905.

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Structural adhesives are widely used with great success, and yet occasional failures can occur, often resulting from improper bonding procedures or joint design, overload or other detrimental service situations, or in response to a variety of environmental challenges. In these situations, cracks can start within the adhesive layer or debonds can initiate near an interface. The paths taken by propagating cracks can affect the resistance to failure and the subsequent service lives of the bonded structures. The behavior of propagating cracks in adhesive joints remains of interest, including wh

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25

Dandayudhapani, Satish K. Raju Keshavanarayana Suresh. "Characterization of in-plane shear properties of laminated composites at high strain rates." Diss., A link to full text of this thesis in SOAR, 2006. http://soar.wichita.edu/dspace/handle/10057/622.

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Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Aerospace Engineering.<br>"Fall 2006." Title from PDF title page (viewed on Oct. 29, 2007). Thesis adviser: K. Suresh Raju. Includes bibliographic references (leaves 54-56).

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26

Akbary, Hamid. "Effects of extra strain rates on uniform shear flow and their relevance to impeller flows." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23857.pdf.

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27

Huang, He. "Experimental study of NiTi alloy under shear loading over a large range of strain rates." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066072.

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Ce travail décrit une étude expérimentale sur des tôles en Ni-Ti à température ambiante en cisaillement plan simple, et pour des vitesses de déformation de 10-4 à 103/s. En quasi-statique (10-4-10-2/s), la mesure optique du champ de déplacement est indispensable à cause du faible déplacement (0.3mm). Des essais à vitesse de déformation intermédiaire (10-1-101/s) ont été réalisés avec la Machine MTS modifiée, capable d'aller à 300mm/s. Une caméra rapide est nécessaire pour suivre ces tests. Enfin, des barres de Hopkinson sont utilisées pour les essais à haute vitesse (102-103/s).Les efforts se

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28

Huang, He. "Experimental study of NiTi alloy under shear loading over a large range of strain rates." Electronic Thesis or Diss., Paris 6, 2016. http://www.theses.fr/2016PA066072.

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Ce travail décrit une étude expérimentale sur des tôles en Ni-Ti à température ambiante en cisaillement plan simple, et pour des vitesses de déformation de 10-4 à 103/s. En quasi-statique (10-4-10-2/s), la mesure optique du champ de déplacement est indispensable à cause du faible déplacement (0.3mm). Des essais à vitesse de déformation intermédiaire (10-1-101/s) ont été réalisés avec la Machine MTS modifiée, capable d'aller à 300mm/s. Une caméra rapide est nécessaire pour suivre ces tests. Enfin, des barres de Hopkinson sont utilisées pour les essais à haute vitesse (102-103/s).Les efforts se

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29

Messick, Casey Owen. "Examining the Mechanics Responsible for Strain Delocalization in Metallic Glass Matrix Composites." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7043.

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Metallic glass matrix composites (MGMCs) have been developed to improve upon the ductility of monolithic metallic glass. These composites utilize a secondary crystalline phase that is grown into an amorphous matrix as isolated dendritic trees. This work seeks to understand the mechanisms underlying strain delocalization in MGMCs in order to better direct efforts for continual progress in this class of material. A mesoscale modelling technique based on shear transformation zone (STZ) dynamics is used to do so. STZ dynamics is a coarse grained technique that can provide insight into the microsco

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30

Hegrová, Michaela. "Vliv etherů celulózy na reologické vlastnosti vápna." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371927.

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The subject of this diploma thesis is a study of the influence of cellulose ethers on the rheological properties of lime. The theoretical part focuses on rheological parameters, techniques and test equipment used in rheology measurements. Various types of cellulose ethers and their influence on the rheological properties of fresh mortars are described. The practical part deals with the study of the influence of different types and quantities of cellulose ethers on the properties of fresh lime pastes and mortars. The results were obtained from measurements on a rotational rheometer with a speci

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31

Ruiz, Daniel John. "Mechanical behaviour of materials at high rates of strain : a study of the double notch shear test." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280611.

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32

Panic, Neboj?sa. "High strain rate-induced failure in steels at high shear strains." 1999. http://hdl.handle.net/1993/1664.

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Materials deformed at high strain rates exhibit sometimes the behaviour that is very different from that at static or quasi-static loading. Material and physical properties that are of no concern in low strain rates become crucial in the material response at high strain rates. Material properties such as thermal diffusivity and thermal softening have to be considered in order to understand the mechanism of deformation at high strain rates. The most important aspect of high strain rate deformation is the occurrence of local thermal and mechanical instability that leads to failure of the materi

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33

Panic, Nebojsa. "High strain rate-induced failure in steels at high shear strains." 1999. http://hdl.handle.net/1993/1664.

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Materials deformed at high strain rates exhibit sometimes the behaviour that is very different from that at static or quasi-static loading. Material and physical properties that are of no concern in low strain rates become crucial in the material response at high strain rates. Material properties such as thermal diffusivity and thermal softening have to be considered in order to understand the mechanism of deformation at high strain rates. The most important aspect of high strain rate deformation is the occurrence of local thermal and mechanical instability that leads to failure of the materi

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34

Deshpande, Nitin. "An experimental investigation of high-shear-strain-rate behavior of metals." Thesis, 1999. https://thesis.library.caltech.edu/524/1/Deshpande_n_1999.pdf.

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NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. The present study investigated the mechanical behavior of metals under high-shear-strain-rates and large shear strains. Numerical and experimental investigation of different specimen geometries for shear testing of materials was carried out. Results of numerical simulations showed that shear stress-strain curves calculated from boundary measurement of load and displacement did not match with the constitutive law for the material. The yield stress for the shear stress-strain curve

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35

Asija, Neelanchali. "Synthesis and characterization of shear thickening fluids for high strain rate applications." Thesis, 2017. http://localhost:8080/iit/handle/2074/7324.

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36

Lee, Nan-wei, and 李南瑋. "High Strain Rate Shear Deformation and Fracture Behaviour of Biomedical Titanium Alloy." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/90751240039678390721.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>95<br>A split-Hopkinson torsional bar system is employed to conduct a comprehensive investigation into the dynamic shear deformation behaviour and fracture characteristics of Ti-15Mo-5Zr-3Al alloy. The investigations commence by examining the mechanical response of the alloy under shear strain rates of 1200 s-1, 2000 s-1 and 2800 s-1, respectively, at temperatures of -150℃, 25℃ and 300℃. The deformation behaviour of the Ti-15Mo-5Zr-3Al alloy is then examined by performing compressive tests using hat-shaped specimens under very high strain rates of 5×104 s-1, 7×104

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37

Bhowmick, Anjan K. "Seismic Analysis and Design of Steel Plate Shear Walls." Phd thesis, 2009. http://hdl.handle.net/10048/787.

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A nonlinear finite element model was developed to study the behaviour of unstiffened steel plate shear walls. The model was validated using the results from quasi-static and dynamic experimental programs. With the validated finite element model, the performance of 4-storey and 8-storey Type D (ductile) and Type LD (limited-ductility) steel plate shear walls with moment-resisting beam-to-column connections was studied under spectrum-compatible seismic records. A design procedure that aims to achieve optimal seismic behaviour for steel plate shear walls was proposed. The proposed method uses t

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38

Delorme, Jeffrey. "Extension of a finite element model to 2D for the prediction of adiabatic shear bands." 2012. http://hdl.handle.net/1993/8916.

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Failure of metals under impact loading is known to occur through the formation of adiabatic shear bands (ASBs). ASBs appear in materials as evidence of damage, and are known to be sites for material failure. General purpose plasticity models fail to predict the phenomenon of ASB formation. The present research validates and extends a model developed at the University of Manitoba by Feng and Bassim to predict damage due to ASBs. Parameters for the Feng and Bassim model are determined experimentally using a direct impact pressure bar to impact specimens at temperatures of 20-500oC and strain r

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39

Weng, Shun-yuan, and 翁順源. "The Behavior of Strain Rate on the Shear Stregth of the Remoulded Clay." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/52276450848898194012.

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40

Chen, Yang-Han, and 陳泱翰. "High Strain Rate with Temporary Braces of the Dynamic Shear and Normal Response." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80997863609804865558.

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碩士<br>國立高雄應用科技大學<br>機械與精密工程研究所<br>102<br>Teeth replacement has been an important therapy for dental treatment, such as dental dentures and the filler materials. In order to obtain the mechanical properties of temporary braces, using the Modified Torsional Kolsky Bar (MTKB) and Split Hopkinson Pressure Bar (SHPB) facility was adopted. The temporary braces were PMMA based materials. The temporary braces were mixed using two types one is same mixed rate the other is different percentages of PMMA compounds. The research investigate braces material applied to a shear force , it produce the shear fa

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41

Tsai, Chong-Liang, and 蔡宗良. "On Stress-Strain-Strain Rate Relationship of Clay Based on Multi-Step Loading Creep and Shear Strength Tests." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/18752448435210000383.

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碩士<br>國立台灣工業技術學院<br>營建工程技術研究所<br>85<br>ABSTRACT The stress-strain-strain rate relations between different test types are studied using a serious of multi-step loading creep and constant strain rate tests of Taipei Silty Clay.Soil creep behavior of multi-step loading creep is compared with single- step loading creep. The influence of loading rate on undrained shear strength, Young''s modulus and pore pressure response are also studied. Results from this study show that：(1) stress-

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42

Polyzois, Ian, and Ioannis Polyzois. "Finite element modeling of the behavior of armor materials under high strain rates and large strains." 2010. http://hdl.handle.net/1993/3963.

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The objective of this research project was to simulate the behavior of armor metals at high strain rates and large strains, using the Johnson-Cook visco-plastic model, while incorporating the formation of adiabatic shear bands. The model was then to be applied to three armor metals, namely maraging steel 300, high hardness armor (HHA), and aluminum alloy 5083-H131; supplied by the Canadian Department of National Defense and tested in compression at the University of Manitoba. The Johnson-Cook model can accurately simulate the behavior of BCC metal (steels) up to a point of thermal instability

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43

Polyzois, Ian. "Finite element modeling of the behavior of armor materials under high strain rates and large strains." 2010. http://hdl.handle.net/1993/3963.

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The objective of this research project was to simulate the behavior of armor metals at high strain rates and large strains, using the Johnson-Cook visco-plastic model, while incorporating the formation of adiabatic shear bands. The model was then to be applied to three armor metals, namely maraging steel 300, high hardness armor (HHA), and aluminum alloy 5083-H131; supplied by the Canadian Department of National Defense and tested in compression at the University of Manitoba. The Johnson-Cook model can accurately simulate the behavior of BCC metal (steels) up to a point of thermal instability

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44

Yu-KaiChen and 陳昱愷. "Application of hollow cylinder torsional shear test to investigate the influence of shear strain rate on soil dynamic characteristics." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/pee25f.

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45

Lin, Yung-Ching, and 林永慶. "The Strain Rate and Temperature Dependence of the Dynamic Shear Properties of Al-Sc Alloy." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/86563883479343051561.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>93<br>The dynamic shear deformation behavior and fracture characteristics of Al-Sc alloy are studied using a split-Hopkinson torsional bar at shear strain rates of 800 s-1, 1800 s-1 and 2800 s-1 and temperatures of -150℃, 25℃ and 300℃. The experimental results indicate that shear strain, shear strain rate and temperature all have a significant influence on the mechanical properties of Al-Sc alloy. At constant temperature, the flow shear stress, fracture shear strain, work hardening rate, yielding shear strength, work hardening coefficient, strain rate sensitivity

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46

Qi, Hong Sheng, and B. Mills. "Modelling of the dynamic tool-chip interface in metal cutting." 2003. http://hdl.handle.net/10454/4081.

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No<br>The formation of tribo-layers during machining is very common phenomena, especially when machining `free machining¿ steels. Several kinds of tribo-layers formed in metal cutting processes have been reported, layers of inclusions from the workpiece, oxide layers due to chemical reaction, plastic deformation layers, material transfer layers (MTLs) or built-up layers (BULs). A new tool¿chip contact model is proposed to explain the tribo-layer phenomena, which considers the nature of the shear strain rate distribution in the secondary deformation zone. A shear strain rate distribution in thi

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47

Yazdani, Faranak. "Investigation of the microstructure of adiabatic shear bands in pure copper under high strain-rate deformation." 2008. http://hdl.handle.net/1993/21314.

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48

Mu-ShiunHsieh and 謝牧勳. "Effects of Temperature and Strain-Rate on the Dynamic Shear Properties of AISI 4140 Alloy Steel." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/57976366054383787394.

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49

Gong, Qian-Ji, and 龔虔稽. "Influences of Temperature and Strain-Rate on the Dynamic Shear Properties of Unweldable Al-Sc Alloy." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/11298228855535849909.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>94<br>This study uses the torsional split-Hopkinson bar to investigate the shear response and fracture characteristics of unweldable Al-Sc alloy during mechanical testing at shear strain rates of 800 s-1, 1500 s-1, 2200 s-1 and 2800 s-1 and temperatures of -150 , 25 and 300 . The experimental results show that both the shear strain rate and the temperature have a significant effect on the shear properties of the Al-Sc alloy. At a constant temperature, the shear stress, fracture shear strain, work hardening rate, yielding shear strength, work hardening coefficient

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50

Huang, Shih-Zhan, and 黃士展. "Test Temperature and Strain Rate Effects on the Shear Properties of a Ti-6Al-4V Alloy." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/98706320410554143495.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>92<br>The dynamic shear deformation behavior and fracture characteristics of Ti-6Al-4V alloy are studied by torsional split-Hopkinson bar at temperature ranging from -100℃ to 300℃ under three strain rates ( 1800 s-1, 2300 s-1, 2800 s-1). The effects of strain rat and temperature on the mechanical response and microstructure of the alloy are evaluated. At constant temperature, flow stress, work hardening rate coefficient and strain rate sensitivity increase with increasing strain rate, but activation volume decreases. Under constant strain rate, flow stress, work h

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