Effect of heating conditions on evaluation of fiber orientation in carbon fiber-reinforced polymer composites using halogen spot periodic heating

Atsushi Akai (Kyoto University of Education)･Yukihiro Hamada (Toyota Motor)･Yasumoto Sato (Toyota Central R&D Labs.)･Atsushi Mikuni (Toyota Motor)

Recently, carbon fiber-reinforced polymer composites have attracted interest in the automotive industry. These composites exhibit higher strength in the longitudinal direction than in the transverse direction of the fibers, making their fiber orientation evaluation crucial. In this study, we investigate the effect of heating conditions on evaluation of fiber orientation in carbon fiber-reinforced polymer composites using halogen spot periodic heating.

Effect of Fire-Resistant Structural Design on the Mechanical Properties of Fiber-Reinforced Polymer Composites

Yusuke Ishihara･Asami Nakai･Masayuki Okoshi (Gifu University)･Atsushi Yuki･Satoshi Enokida･Kouhei Kajitani (DaikyoNishikawa)･Shuhei Yasuda･Junichi Ogawa･Yuki Yamada (Mazda)･Masahiko Shigetsu (Hiroshima University)

The use of electric components in automobiles has led to a demand for improved fire resistance of FRTPs. The objective of this study is to establish a fire resistant structure that can achieve both sufficient flammability and mechanical properties by surface treatment. FRTP moldings with fire resistance were prepared by surface treatment, and the effects on flammability and mechanical properties were evaluated by combustion tests and mechanical tests, respectively.

Design and Performance Evaluation of CFRP Pipes Aimed at High Energy Absorption Characteristics

Riki Oishi･Kakeru Aoike･Asami Nakai (Gifu University)

From the perspective of lightweight design, CFRP pipes with braided structures have attracted considerable attention as energy-absorbing components in automotive applications. This study focuses on hybrid braided structures, employing multiple types of fiber bundles, and aims to design and evaluate CFRP pipes that achieve high energy absorption without compromising their mechanical properties.

Development and Validation of a Finite Element Model for Predicting the Bending Characteristics of CFRP Hat-Shaped Components

Masaharu Noguchi (SUBARU)

To expand the application of CFRP for automotive lightweighting, we are developing reliable analysis techniques. We conducted basic material tests and three-point bending tests on CFRP hat-shaped components, and constructed a finite element model based on the obtained mechanical properties. The validity of the model was verified by comparing the simulation results with experimental data.

Study on Vibration Characteristics of CFRP Plate Bolted Member

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

Carbon fiber reinforced plastic (CFRP) is used as a structural material for car bodies due to its light weight, high strength, and high rigidity. However, there are few studies on the vibration characteristics of structures in which CFRP is bolted jointed, and this issue is an obstacle in product development. In this study, impact tests were conducted on bolted CFRP members to investigate the factors that affect stiffness and damping performance.