Fatigue Strength Evaluation of CFRP Bonding Structure by Urethane Adhesive

Toshiaki Nakamaru (Nissan Motor)･Masayuki Osada･Hiroyuki Akebono･Atsushi Sugeta (Hiroshima University)･Yoshiki Yokote (Hino Motors)･Takamitsu Nishiya (Isuzu Moters)･Tomoyuki Kita (Press Kogyo)･Noriyuki Kawai (Mazda)･Takuya Yuasa (Nissan Motor)･Takeshi Ogawa (Aoyama Gakuin University)

To prevent Global warming caused by CO₂, multi-material automotive structures including CFRP are expanding due to the vehicle weight reduction. Therefore, “CFRP joining Working Group” of Fatigue Reliability Committee in JSAE is studying CFRP structure with the bonding joint. In this report, the fatigue strength of urethane adhesive joint is studied by lap shear joints and specimens simulated car body structure. As results, fatigue properties such as crack initiation and propagation at adhesive joint were clarified. Furthermore, the criteria of fatigue strength were studied to evaluate the adhesive joint of body structures.

A Development of Power Door Chinch Mechanism System for B-pillar Less Side Structure

Yongdae Seo･Hoosang Park･Jaehan Park (Hyundai Motor)･Byungdae Joeng･Taewon Kim･Dosik Moon･Hyeonyeong Park (PHA)

It has been reborn as a space where users can enjoy various activities beyond simple means of transportation by freely relaxing from the labor of driving. Recently, a concept car with various types of opening and closing systems has been released in accordance with the changing times.
The present invention relates to a door locking system of a vehicle without a B-pillar among various door opening/closing structures. In the case of a general door, a latch is disposed inside the door and a striker is disposed in the B-pillar structure to implement a door opening/closing function. However, since it is impossible to configure a striker in a vehicle without a B-pillar, latches and strikers are disposed above and below.

Contribution of Vehicle Structural Components to Passenger Compartment Deceleration in Car-to-Car Frontal Collisions

Kyoka Ota･Yuqing Zhao･Koji Mizuno (Nagoya University)･Kei Nagasaka (Suzuki Motor)

In a vehicle-to-vehicle collision, the components of own car as well as those of the partner car have a significant effect on car deceleration. In this study, this effect was quantified using the rates of change in kinetic energy and internal energy of components of both cars. Futhermore, the contribution of each component to compartment deceleration was examined with varying car types, collision configurations and velocities.

Development of Collision Energy Absorption Member using Fiber-Reinforced Composite Material

Atsuhi Yokoyama (Kyouto Institute of Technology)･Asao Koike (Isuzu Advanced Engineering Center)･Reika Akita･Mirai Sueki (ITOCHU Techno-Solutions)･Kentaro Sakota (JSOL)･Koji Kawamura (Mitsubishi Chemical Advanced Materials)

We have shown that it is possible to create a lightweight and highly energy-absorbing part by creating a crash box, which is a collision energy absorbing member, using fiber-reinforced composite materials. We are elucidating the fracture mechanism by experimentally verifying the compressive fracture behavior of FRP materials. Using image processing technology, we will elucidate the fracture behavior caused by the heterogeneity unique to composite materials and measure the anisotropic material constants. Based on this knowledge, we will develop an analysis method for simulating compressive fracture phenomena. The study focused on development. This report introduces the results of an investigation into the compressive fracture phenomenon of FRP and the development of a simulation method.