Profiling of the characteristic of cumulative fatigue damage to fresh produce by applying shock response spectrum analysis

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K06333
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 41040:Agricultural environmental engineering and agricultural information engineering-related
• Research Institution: Japan Women's University (2023); National Agriculture and Food Research Organization (2020-2022)
• Principal Investigator: KITAZAWA Hiroaki 日本女子大学, 家政学部, 准教授 (20455306)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 蓄積疲労 / 繰り返し衝撃 / 落下試験 / 損傷 / 目視 / 衝撃応答スペクトル / 衝撃加速度 / 緩衝設計

Outline of Final Research Achievements

This study was conducted based on two purposes. The one was to investigate the effect of cumulative fatigue due to repetitive shock on the physiological change of fresh produce. The other was to find processed foods which was damaged by cumulative fatigue. The results of a drop test suggested that the water loss of Chinese chive during storage was accelerated by repetitive shock. Moreover, it was demonstrated that the breakage of two kinds of cookies was obtained by cumulative fatigue caused by repetitive shock. These findings contribute to the development of new design to keep the quality of fresh and processed foods.

Free Research Field

農業環境工学

Academic Significance and Societal Importance of the Research Achievements

本研究によって、青果物において傷や変形といった機械的な損傷のほか、水分減少を主体とする生理的な劣化に繰り返し衝撃による蓄積疲労が関与している可能性が明らかとなった。さらに、加工食品の一つであるクッキーが繰り返し衝撃により割れることを明らかにし、青果物以外にも蓄積疲労の関与による損傷が問題となっている食品が存在することを実証した。それらの成果は、包装を主体とした各食品のための新たな品質保持設計の必要性を示唆するとともに、喫緊の課題である食品ロスの削減に貢献を果たすものと期待できる。