https://kyushu-u.elsevierpure.com/en/persons/masumi-hasegawa
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http://ffpsc.agr.kyushu-u.ac.jp/rigaku/
Evaluation of wood quality are important for a sustainable supply and long-term utilization of wood. The laboratory is studying nondestructive evaluation of physical and mechanical properties in wood and wood based materials using ultrasonic and X-ray CT. .

Ph.D

No

Wood Science, Wood Technology

To achieve a sustainable society that is environmentally friendly, the long-term and cyclical use of wood is crucial. This entails the stable production of wood materials from trees as a resource and the maintenance of secure and safe wooden housing for extended periods. In our research laboratory, a wide range of studies, from fundamental to applied, is conducted using physical and engineering methods to non-destructively evaluate various properties of wood and wood-based materials. We also explore the potential utilization of fast growing trees both domestically and internationally.

Research Interests

• Nondestructive evaluation in fire-retardant wood by air-coupled ultrasonic and X-ray CT
  keyword : fire-retardant wood, air-coupled ultrasonic, non-contact, NDT, X-ray CT
  2015.04.
• Non-contact and nondestructive evaluation in wood by air-coupled ultrasonic
  keyword : air-coupled ultrasonic, non-contact, NDT
  2011.04.
• Nondestructive evaluation in wood by surface wave
  keyword : surface wave, ultrasonic, shear wave, nondestructive, wood, moisture content
  2010.10Acosutoelasticity is an effect that ultrasonic wave velocity propagating through materials changes due to applied stress. The final objective of this study is to develop a new method for evaluating stress state in wood by the ultrasonic technique. We obtained the existence of acoustoelastic phenomena in wood before. Based on this phenomena, we measured the stress state of wood by the acoustoelastic method. The application of the acoustoelastic effect as a new method for stress measurement in wood is expected..
• Propagation characterization of ultrasonic wave in wood
  keyword : ultrasonic wave, wood, longitudinal wave, shear wave, density, moisture content, wood property
  2007.04.
• Studies on the physical and mechanical properties of fast growing trees
  keyword : fast growing tree, wood property, mechanical property, Acacia, Eucalyptus
  2003.10.
• Acoustoelastic effect in wood
  keyword : acoustoelasticity, ultrasonic, shear wave, stress analysis, wood
  1996.04Acosutoelasticity is an effect that ultrasonic wave velocity propagating through materials changes due to applied stress. The final objective of this study is to develop a new method for evaluating stress state in wood by the ultrasonic technique. We obtained the existence of acoustoelastic phenomena in wood before. Based on this phenomena, we measured the stress state of wood by the acoustoelastic method. The application of the acoustoelastic effect as a new method for stress measurement in wood is expected..
• Nondestructive evaluation of deformation behaviors in pretreated lumber during drying using digital image correlation method
  keyword : DIC method, Wood drying, Visualization, NDE
  2012.09～2019.03.
• Ultrasonic method for determining strength properties of timber joints
  keyword : ultrasonic, velocity, stress analysis, timber joint, drift-pin
  2006.04～2020.03.

Current and Past Project

• Recently, there has been an increasing preference for foods and agricultural products with quality and safety assurance guarantees. As a result, interest in developing techniques that evaluate the quality and safety of foods and agricultural products is steadily intensifying. In this project, we investigate the feasibility of using a novel non-contact ultrasonic technique to measure fruit firmness.
• In this project, we attempt to visualize the deformation behaviors of lumber during drying using the digital image correlation (DIC) method.

Academic Activities
Membership in Academic Society

• Japan Wood Protection Association
• Wood Technological Association of Japan
• The Japan Wood Research Society
• The Japanese Society for Non-Destructive Inspection

Educational Activities