Effects of strain rate and deformation heating in tensile testing

Korhonen, Ari; Kleemola, Heikki

doi:10.1007/bf02649843

Cited by 34 publications

(4 citation statements)

References 5 publications

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“…In the above equation, the parameters K and C signify the thermal conductivity and the specific heat respectively whereas D represents the density of the medium. An analytical solution to the heat equation, taking the temperature dependence of the various quantities into account, is difficult to obtain so that a finite difference approximation is 54) considered appropriate…”

Section: Analysis Of Changes In Various Quantities At the Crack Tipmentioning

confidence: 99%

Modeling the Temperature Rise at the Tip of a Fast Crack

Jagannadham¹,

Wilsdorf²,

Reynolds³

1989

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Approved REPO T D CUMETATON P GE0MSNo. 0704-0188 bic ,eagw" anh amaa ftvCiOMti~~ i.,fweIa. lliM.1e to .oy..q. I hourM Wf rtW01te. including the11M ION ICWIA9 wig "theIon. 10811W49 evatifg 46L& WVICOL "ta14 N W wIe visato neede. NoW CORIWIfin and0 Icewinn" t%o coflhoe Of iformation. Send C.0moniat Idoaher tis burdenm etionaW of en, o0~wi aet o the couo Do int9 mo. .nddnq swep"iim for f,~ow"q tis biordis. to W.,Dwn ftes neEeuafw $9-kAUL awY~orso for ItImtOan O00rtom .1 a40onL I a I$ Jistgfl8. ABSTRACT "Temperature changes that take place ahead of a crack tip in the plastic zone have been analyzed using dislocation modeling of the plastic zone. The development of the process zone and that of the plastic zcne is described in terms of dislocation generation and their movement at high strain rates of deformation. Among the various terms contributing to the total energy, the energy dissipation terms have been identified. In particular, the plastic work dissipation rate has been calculated using the phonon viscous drag forces acting on the dislocations. In our analysis, the transition from the heavily deformed process zone to the less heavily deformed p, Ic zone is gradual and continuous. 1.AEC UEOL

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Section: Analysis Of Changes In Various Quantities At the Crack Tipmentioning

confidence: 99%

Modeling the Temperature Rise at the Tip of a Fast Crack

Jagannadham¹,

Wilsdorf²,

Reynolds³

1989

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“…Given the extensive application of thin-walled metallic sheets, it is imperative to research and study the ductile fracture behavior of thin-walled metallic materials utilized in different sectors. Sheet metal forming is a crucial process in car body manufacturing, playing a central role in shaping and fabricating various components of a vehicle's exterior [20][21][22][23][24][25][26][27][28]. This process involves transforming flat sheets of metal, typically steel or aluminum, into three-dimensional parts, which constitute the framework of a car body, by various techniques, such as stamping, deep drawing, and hydroforming.…”

Section: Introductionmentioning

confidence: 99%

“…The primary objective of sheet metal forming in car manufacturing is to create components with precise dimensions and a high structural integrity. In sheet metal forming processes, the phenomenon of fracture, also known as sheet metal fracture or tearing, is a critical concern that can adversely affect the quality and integrity of formed components [25]. Fracture occurs when the metal sheet undergoes excessive deformation, resulting in the development of cracks or defects.…”

Section: Introductionmentioning

confidence: 99%

“…For example, shear fracture occurs along shear planes and is common in materials with low ductility, while the necking phenomenon, especially in regions with a high deformation, can make the material more susceptible to fracture. In addition to the mentioned factor, the speed of loading or loading rate is another important parameter that can affect the sheet metal forming process [22,23,25]. Higher loading rates, such as those encountered in rapid-forming processes, can increase the likelihood of fracture.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Mode Mixity and Loading Rate on Fracture Behavior of Cracked Thin-Walled 304L Stainless Steel Sheets with Large Non-Linear Plastic Deformation

Bidadi,

Saeidi Googarchin,

Akhavan-Safar

et al. 2023

Materials

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This study investigates the mixed-mode I/II fracture behavior of O-notched diagonally loaded square plate (DLSP) samples containing an edge crack within the O-notch. This investigation aims to explore the combined effects of loading rate and mode mixity on the fracture properties of steel 304L, utilizing DLSP samples. The DLSP samples, made from strain-hardening steel 304L, were tested at three different loading rates: 1, 50, and 400 mm/min, covering five mode mixities from pure mode I to pure mode II. Additionally, tensile tests were performed on dumbbell-shaped specimens at the same loading rates to examine their influence on the material’s mechanical properties. The findings revealed that stress and strain diagrams derived from the dumbbell-shaped samples were largely independent of the tested loading rates (i.e., 1–400 mm/min). Furthermore, experimental results from DLSP samples showed no significant impact of the loading rates on the maximum load values, but did indicate an increase in the ultimate displacement. In contrast to the loading rate, mode mixity exhibited a notable effect on the fracture behavior of DLSP samples. Ultimately, it was observed that the loading rate had an insignificant effect on the fracture path or trajectory of the tested DLSP samples.

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Zum Einfluß von Temperatur und Dehngeschwindigkeit auf die Festigkeits‐ und Dehnungskennwerte von Baustählen mit unterschiedlicher Festigkeit

Krabiell

Dahl

1981

Steel Research Intl

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Untersuchungen an vier ferritisch perlitischen Stählen unterschiedlicher chemischer Zusammensetzung und Korngröße sowie einem bainitischen Stahl mit Streckgrenzenwerten zwischen 200 N/mm2 und 630 N/mm2. Ermittlung von Zugfestigkeit, Streckgrenzenverhältnis, Verfestigungsexponent, Lüders‐, Gleichmaß‐ und Bruchdehnung sowie Brucheinschnürung in Abhängigkeit von Temperatur und Dehngeschwindigkeit. Hinweise auf Spaltbruch oder plastische Instabilität bei hohen Dehngeschwindigkeiten. Ermittlung des Übergangs von isothermischen zu adiabatischen Versuchsbedingungen.

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Effects of strain rate and deformation heating in tensile testing

Cited by 34 publications

References 5 publications

Modeling the Temperature Rise at the Tip of a Fast Crack

Modeling the Temperature Rise at the Tip of a Fast Crack

Effects of Mode Mixity and Loading Rate on Fracture Behavior of Cracked Thin-Walled 304L Stainless Steel Sheets with Large Non-Linear Plastic Deformation

Zum Einfluß von Temperatur und Dehngeschwindigkeit auf die Festigkeits‐ und Dehnungskennwerte von Baustählen mit unterschiedlicher Festigkeit

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