A fundamental study on the nonhomogeneous and anisotropic hygrothermoelasticitiy assuring the design procedures of wooden products

2015 Fiscal Year Final Research Report

• Project/Area Number: 24560108
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Osaka Prefecture University
• Principal Investigator: Ishihara Masayuki 大阪府立大学, 工学(系)研究科(研究院), 准教授 (60283339)
• Co-Investigator(Kenkyū-buntansha): OOTAO YOSHIHIRO 大阪府立大学, 工学研究科, 教授 (10275274) ; KAMEO YOSHITAKA 京都大学, 再生医科学研究所, 助教 (60611431)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 連続体力学

Outline of Final Research Achievements

The construction of the fundamental hygrothermoelastic theory considering the dependence of material properties on the hygrothermal environment was sought. At first, the hygrothermal diffusion equations considering the absorption and dissolution of moisture by assuming that moisture exists as dissolved and gaseous forms in the substantial solid parts and voids, respectively. Theoretical analyses of one-dimensional steady or transient hygrothermoelastic field in a strip or cylinder were performed. Then, numerical calculations revealed the distributions of the field quantities such as temperature, dissolved moisture content, vapor concentration, and stresses. As a result, it was found that the proposed diffusion equations are able to describe the nonlinear relation between temperature and moisture content and that the stresses are developed anew by considering the absorption and dissolution of moisture.

Free Research Field

固体力学