Prediction of Mechanical Behaviour of Low Carbon Steel at High Strain Rate Using Thermal Activation Theory and Static Data

Ogawa, Kinya; Kobayashi, Hidetoshi; Sugiyama, Fumiko; Horikawa, Keitaro

doi:10.1299/jsmea.48.228

Cited by 8 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The impact test was performed by using the split Hopkinson pressure bar (SHPB) method. Dynamic stress-strain curves can be obtained by incorporating elementary one-dimensional elastic wave propagation theory [10][11][12][13] into the SHPB method. Figure 1 shows the SHPB apparatus Ã mass% * Graduate Student, Osaka University for the impact tensile test.…”

Section: Methodsmentioning

confidence: 99%

Effect of Trace Sodium on High Temperature Embrittlement in Quasi-Static and Impact Deformation of Al-5 mass% Mg Alloys

2009

Self Cite

View full text Add to dashboard Cite

In order to elucidate the mechanism of the high temperature embrittlement of Al-5 mass% Mg alloys containing traces of sodium, microscopic observation of grain boundaries during quasi-static and impact tensile deformation was carried out. The high temperature embrittlement during the quasi-static deformation was caused by a combination of grain boundary sliding and grain boundary serration. On the other hand, the high temperature embrittlement during the impact deformation was caused by the localization of stress concentration at the grain boundaries. This localization was due to planar slips.

show abstract

Section: Methodsmentioning

confidence: 99%

Effect of Trace Sodium on High Temperature Embrittlement in Quasi-Static and Impact Deformation of Al-5 mass% Mg Alloys

2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, the effect of the reflected stress wave from the bottom of the transmitted bar is very small when σ 21 σ 11 . This implies that the compressive stress deformation can be detected for a long time without any disturbances since this apparatus ignores the reflected stress wave.…”

Section: Dynamic Testmentioning

confidence: 99%

“…By applying elementary one-dimensional elastic wave propagation theory [9][10][11], the nominal stress (σ (t), nominal strain (ε(t)), and strain rate (ε(t) in the foamed PE film specimen can be determined as follows: …”

Section: Impact Testmentioning

confidence: 99%

Dynamic compressive behavior of foamed polyethylene film

Tateyama

Yamada

Ogasawara

et al. 2015

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

Abstract. The foamed film as the shock absorption material has attracted much attention because it is thin (100 µm ∼ 400 µm) and has a closed cell structure. However, the dynamic mechanical properties have not been reported in the foamed film. The purpose of this study is to elucidate the compressive behavior of the foamed polyethylene film at the wide strain rate range. First, the new compressive test apparatus for the dynamic strain rate, the drop-weight testing machine with opposed load cell, was developed, which can be also evaluated the dynamic stress equilibrium of the specimen. It is confirmed that the compressive flow stress increased with increasing the strain rate, regardless of the film thickness. The foamed polyethylene film has the high strain rate sensitivity in the quasi-static deformation. On the other hand, there is almost no change of the strain rate sensitivity in the dynamic and the impact deformation. In order to investigate the mechanism of strain rate dependence, the foamed polyethylene film was observed by X-ray computed tomography scanner before and after compressive test. The fracture of the closed cell only occurred in the quasi-static deformation. It was clarified that the strain rate sensitivity of the foamed film depends strongly on that of the construction material, polyethylene.

show abstract

“…Dynamic stress-strain curves can be obtained by incorporating the elementary one-dimensional elastic wave propagation theory [10][11][12] into the SHPB method. Figure 2 shows the setup of the SHPB apparatus for the impact compression test.…”

Section: Impact Testmentioning

confidence: 99%

Effect of high strain rate on micro-indentation test in pure aluminum

Yamada

Ogasawara

Shimizu

et al. 2012

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. The indentation properties of pure aluminum (99.9%, 3N aluminum) and high purity aluminum (99.999%, 5N aluminum) with respect to the strain rate dependence of strength are experimentally investigated in order to clarify the effect of strain rate on the micro-indentation test. A micro-indentation test using a Berkovich indenter was performed at loading rates of 0.7, 7, and 70 mN/s. In all of the specimens, the indenter was loaded to a maximum value of 1200 mN, and then was maintained for 30 s. In the 3N specimen, the dependence of the loading rate on the load was slight at loading rates of 0.7 and 7 mN/s, whereas the load at the loading rate of 70 mN/s was higher than the loads at loading rates of 0.7 and 7 mN/s. On the other hand, the load for the 5N specimen increased with the increasing loading rate. Thus, the effect of the loading rate on the load-displacement curve for the 3N and 5N specimens was similar to the strain rate dependence of strength for theses metals. In addition, the micro-indentation test was demonstrated to be strongly affected by high strain rate at a loading rate of 70 mN/s.

show abstract

Prediction of Mechanical Behaviour of Low Carbon Steel at High Strain Rate Using Thermal Activation Theory and Static Data

Cited by 8 publications

References 7 publications

Effect of Trace Sodium on High Temperature Embrittlement in Quasi-Static and Impact Deformation of Al-5 mass% Mg Alloys

Effect of Trace Sodium on High Temperature Embrittlement in Quasi-Static and Impact Deformation of Al-5 mass% Mg Alloys

Dynamic compressive behavior of foamed polyethylene film

Effect of high strain rate on micro-indentation test in pure aluminum

Contact Info

Product

Resources

About