Plastic Stress Wave Propagation in a Circular Bar Induced by a Longitudinal Impact

Tanaka, Kichinosuke; Kurokawa, Tomoaki; Ueda, Kazunaga

doi:10.1007/978-3-642-82767-9_26

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…So, the numerical models built could be considered valid and accurate to simulate the experimental tests. The slight differences between the amplitude and the duration of the force pulses obtained from experiments and simulations might be due to damping and defects of material [20], which were not taken into account in the numerical simulations.…”

Section: Discussionmentioning

confidence: 99%

New Technique for Impact Calibration of Wide-Range Triaxial Force Transducer Using Hopkinson Bar

Wang

Guo

et al. 2022

Sensors

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At the current stage, there is an urgent need for new techniques to dynamically calibrate advanced wide-range (up to 104 N~105 N) triaxial force transducers. Based on this background, this paper proposes a novel impact calibration method, specifically for the triaxial force transducer, with a wide range and high-frequency response. In this method, the Hopkinson bar, which is typically used to test the dynamic mechanical properties of materials, was used as a generator to generate reference input force for the transducer. In addition, unlike conventional methods, the transverse sensitivities of the transducer were given necessary importance in the proposed method. The calibration result of the triaxial force transducer was expressed in a sensitivity matrix, containing three main sensitivity coefficients and six transverse sensitivity coefficients. The least squares method (LSM) was used to fit the sensitivity matrix linearly. Calibration experiments were performed on a typical triaxial force transducer. Several key issues, involving the validity and the test range, of the method were further investigated numerically. The feasibility and validity of the method were eventually confirmed. The test range of the method can be up to 106 N.

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Section: Discussionmentioning

confidence: 99%

New Technique for Impact Calibration of Wide-Range Triaxial Force Transducer Using Hopkinson Bar

Wang

Guo

et al. 2022

Sensors

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“…Various methods, such as separation of variables [19][20][21], D'Alembert's solution [22,23], finite difference method [24], finite element method (FEM) [25,26], or Laplace transform [27][28][29], can be employed to solve Eq. ( 2).…”

Section: Le Xmentioning

confidence: 99%

“…The numerical integration provided by Yang et al [31] was utilized to obtain the stress wave propagation in a Rayleigh-Love rod to solve Eqs. (24) to (28). The process for solving Eqs.…”

Section: D1 A1 E1 1 1mentioning

confidence: 99%

Stress Wave Propagation in a Rayleigh–Love Rod with a Sudden Cross-Sectional Area Variation Impacted by a Striker Rod

Wang,

Thang,

Wang

2024

Preprint

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This paper presents an in-depth study of the stress wave behavior propagating in a Rayleigh–Love rod with a sudden cross-sectional area change. The analytical solutions of stress waves are derived for the reflection and transmission propagation behavior at the interface of the cross-sectional area change in the rod, considering inertia and Poisson’s effects. Examples solved by the finite element method are provided to verify the correctness of the analytical results. In addition to the forward analysis of Rayleigh–Love wave propagation in rods impacted by a striker rod, a nondestructive testing method is proposed to conduct the defect assessment in the rod type of the structure component with a sudden cross-sectional area change within a cover medium by using the measured signals at the measurable zone of the rod to be inspected.

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“…If the length of the bar is more than 15 times larger than the diameter of the bar, the motion of the end surface can be considered to be in plain [2].The elastic pulse can be detected by the strain gage bonded at the point 1g from the end surface. Fig.…”

Section: Principle Of Motion Generationmentioning

confidence: 99%

Review on the importance of measurement technique in micromachine technology

Umeda¹

1996

Microlithography and Metrology in Micromachining II

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In the beginning stage of MITI micromachine project, the committee on the standardization established in Micromachine Center recognized the importance of measurement technique for the promotion and the systematization of the micromachine technology. Micromachine Center is the organizing body for private sectors working in the MITT micromachine project which started in 199 1 .MITI stands for Ministry of International Trade and Industry in Japan. In order to know the requirements on the measurement technologies, the questionnaire was organized by the measurement working group in the committee. This talk covers the questionnaire and its results, and some research results obtained at National Research Laboratory of Metrology working as a member in the project. IntroductionIt is a world wide trend that many governments in industrialized countries are promoting large scale R&D program toward miniaturization. NRLM, National Research Laboratory of Metrology, Agency of Industrial Science and Technology, Ministry of International Trade and Industry might be the first measurement standard research laboratory that participated in one of the above programs. Many people say that measurement is very important in the micromachine technology development. The reasons might be, in my opinion considered as follows: 1) The advent of silicon micromachining has produced silicon sensors. The influence of these silicon sensors to every aspect of technology is enormous. 2) Micromachine is to great extent a machine for measurement. It is hardly possible to think that the microsystem is for power generation or for manufacturing of large scale structures.3) The governing fundamental principles and the principal physical quantities are different from those in the conventional world, leading to the establishment of the new measurement technique and the measurement standard for the quantities dismissed in the past. 4) Mass production of silicon sensors explicitly amplified and clarified the fact that the conventional measurement and evaluation technique is not perfect. The typical example might be accelerometers. 5) Almost no established evaluation method exists in the micromachine field. Force, torque, bonding, three dimensional shape etc. 6) The validity of measurement and evaluation technique or instruments from the view point of micromachine is not yet investigated at all. We have not yet started the discussion whether the specimen size miniaturized version of the conventional testing technique is reasonable. Commercially available instruments are also not clear if they have enough performance as indicated in the specifications, because miniaturization demands higher accuracy and wider dynamic range, for example. 7) The essential difference between micromachine technology and the conventional technology amplifies the importance of measurement and measurement standards. The typical example might be the determination of material constant in the user side. This comes from that material characteristics depend on fabrication facilities. ...

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Plastic Stress Wave Propagation in a Circular Bar Induced by a Longitudinal Impact

Cited by 7 publications

References 5 publications

New Technique for Impact Calibration of Wide-Range Triaxial Force Transducer Using Hopkinson Bar

New Technique for Impact Calibration of Wide-Range Triaxial Force Transducer Using Hopkinson Bar

Stress Wave Propagation in a Rayleigh–Love Rod with a Sudden Cross-Sectional Area Variation Impacted by a Striker Rod

Review on the importance of measurement technique in micromachine technology

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