Evaluation of serration using the fast Fourier transform method

• FURUTA Masanobu

  Graduate Student, Graduate School of Engineering, University of Yamanashi

• NAKAYAMA Yoshihiro

  Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi

Bibliographic Information

Other Title

• 高速フーリエ変換法を用いたセレーションの評価
• コウソク フーリエ ヘンカンホウ オ モチイタ セレーション ノ ヒョウカ

Abstract

Fast Fourier Transform (FFT) method was applied in order to evaluate a repeated load drop (serration) observed in the load-time curves in the tensile test. 5083 aluminum alloy plates were tested in tension at temperatures between 203 K and 333 K using an Instron type tensile test machine. Changes in repeated load drops with the deformation temperature were characterized by a conventional method (mean amplitude ΔL_m and number N of load drops) and FFT method (maximum amplitude C_max and peak frequency f_p derived from the Fourier spectrum). C_max and f_p were compared with ΔL_m and N, respectively. The comparison showed the reasonable agreement between f_p and N, as well as that of C_max and ΔL_m. In evaluation of the serration using FFT method, there was no artificial reading error and reliable analysis could be carried out in a short time. Therefore it suggests that FFT method is suitable for the investigation of the serration.

Journal

• Journal of Japan Institute of Light Metals

  Journal of Japan Institute of Light Metals 54 (2), 51-56, 2004

  The Japan Institute of Light Metals

Keywords

• serration
• Fast Fourier Transform method
• peak frequency
• maximum amplitude of spectrum
• 5083 aluminum alloy

Details

• CRID: 1390282681316866560
• NII Article ID: 10012098761
• NII Book ID: AN00069773
• DOI: 10.2464/jilm.54.51
• ISSN: 18808018
• ISSN: 04515994
• ISSN: http://id.crossref.org/issn/04515994
• NDL BIB ID: 6865227
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6865227
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed