Statistical characteristics of fracture surfaces in high-strength steel drop weight tear test specimens

Strnadel, Bohumír; Ferfecki, Petr; Židlík, Pavel

doi:10.1016/j.engfracmech.2013.10.001

Cited by 17 publications

(11 citation statements)

References 36 publications

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“…At high strain rate and elevated temperature conditions, several experimental methods such as split Hopkinson pressure bar (SHPB) test (self-made device) [ 19 ], impact test (Instron, Boston, MA, USA.) [ 20 ], and drop hammer test (Yonekura, Osaka, Japan) [ 21 ] have been applied. The SHPB device is simple in structure.…”

Section: Methodsmentioning

confidence: 99%

Stress-Strain Curves and Modified Material Constitutive Model for Ti-6Al-4V over the Wide Ranges of Strain Rate and Temperature

Hou

Liu

et al. 2018

Materials

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The mechanical properties of Ti-6Al-4V alloy are sensitive to strain rate and temperature load. The finite element simulation results of high-speed machining Ti-6Al-4V alloy depend on the accurate description of dynamic deformation. However, it is hard to describe the flow stress behavior in current constitutive models in a complex high-speed machining process for Ti-6Al-4V alloy. In this paper, the stress-strain curves of Ti-6Al-4V alloy under the wide ranges of strain rate and temperature are obtained by high-velocity uniaxial impact tests. The apparent coupling between temperature and strain is observed, which proves that the temperature is dependent on a hardening effect for Ti-6Al-4V alloy. A function describing the coupling between temperature and strain is then introduced into the modification for the original Johnson-Cook (JC) constitutive model. The maximum deviation between the predicted data from using the proposed modified JC constitutive model and experimental data is reduced from 10.43% to 4.19%. It can be concluded that the modified JC constitutive model is more suitable to describe the temperature-dependent hardening effect, which provides strong support for accurate finite element simulation of high-speed machining Ti-6Al-4V alloy.

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Section: Methodsmentioning

confidence: 99%

Stress-Strain Curves and Modified Material Constitutive Model for Ti-6Al-4V over the Wide Ranges of Strain Rate and Temperature

Hou

Liu

et al. 2018

Materials

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“…(2) 3. The realization {x}i was processed using the rainflow method, which determined the number of the closed loop count for created classes (m) and the relevant average value (xM, mean) and amplitude (xA, amplitude) in class j [8,10]. The output from this step was a file containing triple data:…”

Section: Fatigue Analysesmentioning

confidence: 99%

Simplified Estimate of Fatigue Damage Based on Dynamic Analysis

Dekýš¹,

Kriska²,

Lietava³

et al. 2018

SJSUT.ST

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“…The created finite element model of the transport carriage is made from 10 independent bodies and 10 independent meshes of the finite elements as well [16,17]. The meshes are connected through the contact which is defined between following parts of the construction:  the contact between the wheel pins and the undercarriage with the gluemesh in 4 places,  the contact between the undercarriage and the turning platform with the gluemesh in 2 places,  the contact between the frame and the turning platform with the gluemesh in the 2 places,  the contact between the floor and the frame without friction in 1 place.…”

Section: Boundary Conditionsmentioning

confidence: 99%

Determination the maximum load capacity of the welded structure of the transport carriage in operation

et al. 2018

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The article presents a calculation procedure for determining the maximum permissible load on the welded structure of the transport carriage. During the transport carriages operation inside the production hall there was no breakage of the welding joints. The use of carriages outside the hall and with an uneven surface began to create cracks and fractures in the weld joints. The values of vertical accelerations that were generated by running on uneven surfaces were determined by experimental measurement. To avoid cracks in welded joints, the maximum permissible load value of the transport carriage was subsequently determined by calculation using FEM.

show abstract

Statistical characteristics of fracture surfaces in high-strength steel drop weight tear test specimens

Cited by 17 publications

References 36 publications

Stress-Strain Curves and Modified Material Constitutive Model for Ti-6Al-4V over the Wide Ranges of Strain Rate and Temperature

Stress-Strain Curves and Modified Material Constitutive Model for Ti-6Al-4V over the Wide Ranges of Strain Rate and Temperature

Simplified Estimate of Fatigue Damage Based on Dynamic Analysis

Determination the maximum load capacity of the welded structure of the transport carriage in operation

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