Relationship between Void Distribution Function of Soft Polyurethane Foam and Mechanical Property (Compression Force - Displacement Characteristic) (First Report)
-Development of Evaluation Methodology and Parameter Studies of Void Distribution Function-

MINORU INOUE (Mazda / Kagawa Univ. / Hiroshima Univ.)･KEISUKE SUZUKI (Kagawa University)･HIROYUKI ITO (TOYO SEAT Co.Ltd.)

Mechanical properties (compression force – displacement characteristics) of the soft urethane foams used for seats have a great impact on vehicle ride comfort performance. However mechanical properties are resultantly determined by the base plastic material, chemical blowing agents and molding conditions and so controlling and designing mechanical properties in advance are difficult. Because of the recent developments of measurement and image processing techniques, void distribution function of the urethane foam can be obtained and methodology to evaluate the mechanical properties using void distribution functions are established and applied to the urethane parameter studies.

Study on Damping Performance of Resin and Metal Members with Bolted Joints
-Mechanical Factors of Vibration Damping and Analysis Model-

Keisuke Inoue･Tristan Samuel Britton (Fujimori)･Yoshinao Kishimoto･Yukiyoshi Kobayashi･Satoru Kuga･Yuuki Kawaharabashi (Tokyo City University)

Resin materials such as ABS resin are used in interior and exterior parts of automobiles to ensure vibration absorption and impact resistance. In this study, hammering tests were conducted to clarify the main factors that determine damping performance of structures with bolted jointed resin and metal members. It clarified the factors are viscosity of the resin and friction between the members, and the finite element analysis was used to predict the damping performance.

Development of Body Part Integration Technology Utilizing Ultra High Strength Steel and Cold Stamping

Ryo Ageba･Shunsuke Tobita･Satoshi Sumikawa･Yoichiro Onishi･Kazuhiko Higai･Tsuyoshi Shiozaki (JFE steel)

To reduce manufacturing costs in vehicle bodies, aluminum casting and hot stamping technologies are gaining attention. Simultaneously, cost reduction through component integration is being explored for cold-pressed parts. This report focuses on the rear member structure, proposing a reduced component design that balances crash performance, rigidity, and formability by utilizing ultra high-strength materials and cold pressing techniques.

Examination of analytical conditions for VOC components in vehicle interior using hydrogen carrier gas TD-GC-MS

kyosuke Karaki･Koichi Tatsu (Isuzu Motors)･Kunihiro Hoshino (ENV Sciences Trading)･Sadao Nakamura･takeshi Serino (Agilent Technologies Japan)･maiko Tahara (National Institute of Health Sciences)･Matsui Hidechika (Tokai Technology Center)

Quantitative analysis of VOC components was performed using TD-GCMS with hydrogen carrier gas. Sensitivity and LOQ were confirmed, and quantitative analysis was compared with that using helium carrier gas to determine optimal analytical conditions.

Development of a brake chamber failure prediction model using machine learning

MIKIYA OKUZAWA･Tomoya Suzuki (Ibaraki University)

Brake chambers used in transport trucks are the most important parts in terms of safety. However, they are prone to deterioration due to internal corrosion caused by rust, which makes visual inspection difficult. Therefore, by using machine learning to learn about the operating conditions of trucks, we aim to develop a predictive model that estimates the risk of brake chamber failure and use it as a criterion for deciding whether to perform expensive disassembly and inspection.