Dynamic deformation of aluminum alloys at high temperature by using SHPB techniques

Lee, O.S.; Hwang, Si Won; Choi, Hye Bin; Kim, D.H.; Kim, H.M.

doi:10.1051/dymat/2009063

Cited by 2 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6 shows that the flow stress is not obviously increased with the increase of strain rate at high temperatures. That is, the thermal softening effect is increased under the high-temperature condition [5]; however, some discrepancies are evident be- tween the experimental and the fitted curves at temperatures higher than 573 K, as shown in Fig 6 (b). Further investigation is needed regarding this matter.…”

Section: The Flow Stress-strain Relationshipmentioning

confidence: 93%

“…where L is the initial length of the specimen, 0 C ( 0 C E ρ = , ρ is the mass density of pressure bar) is wave propagation velocity; A and As are the cross-sectional areas of the pressure bar and the specimen, respectively; and E is the Young's modulus of the material of the two pressure bars [5].…”

Section: Basic Theory Of Shpb Techniquementioning

confidence: 99%

“…The compressed air accelerates the striker bar. A Lecroy Wavepro 940 oscilloscope, Instruments Division 2311 signal conditioning amplifier, a photo sensor, and a Graphtec mini logger GL220 are used to measure the dynamic strain outputs, the velocity of the striker bar, and the temperature of the specimen [5].…”

Section: High Temperature Shpb Apparatusmentioning

confidence: 99%

“…The temperature profiles of the specimen used in this study are shown in Fig. 3, with consideration of the contact time between the specimen and pressure bars [5].…”

Section: Temperature Measuring Of Specimenmentioning

confidence: 99%

“…4 (a) and Fig. 4 (b), respectively [5,7]. Approximately 10% signal fluctuation is achieved by the pulse shaper compared with the signals of 100% fluctuation without the pulse shaper.…”

Section: Pulse Shapermentioning

confidence: 99%

See 4 more Smart Citations

High-temperature dynamic deformation of aluminum alloys using SHPB

2011

View full text Add to dashboard Cite

This paper investigates the dynamic deformation behavior of two aluminum alloys, 2024-T4 and 6061-T6, using a modified split Hopkinson pressure bar (SHPB) with a pulse shaper technique at both elevated and room temperatures. An experimental strategy is proposed, and the dynamic deformation behaviors of two alloys are evaluated with the modified high-temperature SHPB apparatus. The experiments were carried out under varying strain rates and temperatures. The reflected waves modulated by the pulse shaper, the flow stressstrain relationships, the strain rates, the front-and back-ends stresses during the dynamic deformation period were measured at varying high temperatures. Experimentally obtained data were used to evaluate the parameters in the material constitutive equation, such as the Johnson-Cook (JC) constitutive model.

show abstract

Section: The Flow Stress-strain Relationshipmentioning

confidence: 93%

Section: Basic Theory Of Shpb Techniquementioning

confidence: 99%

Section: High Temperature Shpb Apparatusmentioning

confidence: 99%

“…The temperature profiles of the specimen used in this study are shown in Fig. 3, with consideration of the contact time between the specimen and pressure bars [5].…”

Section: Temperature Measuring Of Specimenmentioning

confidence: 99%

“…4 (a) and Fig. 4 (b), respectively [5,7]. Approximately 10% signal fluctuation is achieved by the pulse shaper compared with the signals of 100% fluctuation without the pulse shaper.…”

Section: Pulse Shapermentioning

confidence: 99%

See 3 more Smart Citations

High-temperature dynamic deformation of aluminum alloys using SHPB

2011

View full text Add to dashboard Cite

show abstract

Three-Wave Mutual-Checking Method for Data Processing of SHPB Experiments of Concrete

Wang

Shang

2014

J. mech.

View full text Add to dashboard Cite

Two-wave methods and Three-wave method are conventional methods to process the SHPB experiment data. Due to the presence of transient waves in dynamic experiments, both the stress and strain fields within a specimen are seldom absolutely uniform. Different date processing methods lead to different results. In this paper, we have developed a program to compare the results getting from different methods. The difference of the strains corresponding to the ultimate stress can reach 20. Which one is better? One material shouldn't have different constitutive. In order to solve the problem, we have developed Three-wave mutual-checking method, which is based on the conservation of the momentum of the whole system. This method provides a checking mechanism, so some human error can be avoided when process the same experiment data. By this method, different person can obtain the only credible stress-strain curve based on the same test data.

show abstract

Dynamic deformation of aluminum alloys at high temperature by using SHPB techniques

Cited by 2 publications

References 0 publications

High-temperature dynamic deformation of aluminum alloys using SHPB

High-temperature dynamic deformation of aluminum alloys using SHPB

Three-Wave Mutual-Checking Method for Data Processing of SHPB Experiments of Concrete

Contact Info

Product

Resources

About