Development of aluminium metal matrix composites disc brake rotor

Abstracts / JSAE Review 17 (1996) 435-458 reinforcement technology. The use of a new complex welding electrode, filled with capsule powder, made it possible to overlay through MIG welding process to the cast iron, conventionally considered to be difficult. Application to the lower surface of the cylinder head was also considered. 9632712 Absorbed Impact Energy of Hat Square C o l u m n in High Strength Steels Kentaro Sato, Akihide Yoshitake, Tomoyoshi Okita (NKK Corporation) In order to improve the capability of frontal or rear automotive members to absorb impact energy, a basic study was performed to evaluate the effect of strength, micro-structure, and plate thickness on dynamic deformation phenomena using tensile specimens and hat square columns. Tensile strength of the materials were selected from 340 to 1180 MPa class steels. Tensile tests were carried out under strain rates from 10 -3 to 103/s and crash tests of hat square columns were conducted under test speeds from 0.0083 to 10.0 m / s e e . 9632721 The Effect of Sheet Steel Strength on the Fatigue Strength of Road Wheel Masato Kurita, Nozomi Komatsubara (Sumitomo Metal Industries., Ltd.), Kiyozumi Asano, Masaru Sano (Kanai Motor Wheel Co., Ltd.), Yosiaki Nakazawa, Miyuki Yamamoto (Sumitomo Metal Industries., Ltd.) To study the effect of sheet steel strength on the fatigue strength of a road wheel, rotating bending fatigue tests of 370 to 780 MPa grade steel wheels were carried out. In addition, cyclic stress and residual stress at the crack initiation site, such as hat area and ventilation hole edge, were measured. As a result, fatigue life is saturated beyond the 540 MPa grade steel. It is shown that this is because residual stress, mainly caused by press forming, increases proportionally with sheet steel strength. 9632730 Development of New W a t e r Repellent Glass System Yasuaki Kal, Satoko Sugawara (Nissan Motor Co., Ltd.), Akira Yuasa, Yoshinori Akamatsu (Central Glass Co., Ltd.) Maintaining clear visibility in rainy weather is important m reducing drivers' work load. Water repellent glass is a useful technology for this purpose, because it provides better visibility by forming water droplets instead of a water film. However, water repellents have certain drawbacks, including a shorter service life than desired. There are strong demands for water repellent glass with a longer life. This paper presents a new type of water repellent glass system consisting of an inorganic base layer, with a larger surface area, and a water repellent layer with a fluorine functional agent. Besides providing a much longer life, the new glass system is hard enough to be used for the side windows of hardtop vehicles. 9632749 Development of Aluminium Metal Matrix Composites Disc Brake Rotor Yukihiro Sugimoto, Nobuynki Oda, Takahiro Higuchi, Kouji Mineshita (Mazda Motor Corporation) Automotive brake rotors made from aluminium metal matrix composites were evaluated by dynamometer and vehicle tests. The friction and wear performance and the thermal response during fade stops were compared with those of commercially producted cast iron rotors. It was shown that the use of metal matrix composites for the rotor is effective for weight reduction and decreasing maximum operating temperature of brake systems. 9632758 Deformation of Aluminum Bumper Beams in C o r n e r Pend u l u m Impact Test. Hideki Ishitobi, Akibumi Fujiwara (Kobe Steel, Ltd.) The comer impact test using a pendulum-type device is a low speed impact test for the vehicle bumpers. The purpose of this paper is to examine the behavior of bumper beams in the comer impact test. There are two types of deformation mode: cross section collapse mode and beam bending. The deformation mode can be predicted using the ratio of bending collapse load to web collapse load. The deformation is minimized when this ratio is between 0.5 and 1.0.

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9632767 Energy Absorption Characteristics of Structural GFRP Tubes - Influence of Test Speed - Hiroyuki Mitsuishi (Japan Automobile Research Institute), Manahn Ushiro (Mitsubishi Motors Corporation), Masayuki Munemura (lsuzu Advanced Engineering Center), Hiroyuki Hamada (Kyoto Institute of Tech.) The purpose of this study is to investigate the energy absorption characteristics of GFRP (glass cloths/epoxy) tubes on static and impact tests. Axial compression tests were carried out at several speeds, using the static and impact testing machine. As a result, it was shown that the energy absorption characteristics of GFRP tubes were not influenced by test speed in this study. 9632776 Three-dimensional Behavior of Vehicle at Offset Collision - C o m p u t e r Simulation Using Dynamic Model - Makoto Abe, Masaaki Morisawa, Eiichi Kuboshima (Musashi Institute of Technology), Takeshi B. Satu (Keio Gijuku University) An investigation was made into the three-dimensional behavior of two vehicles when they collided with frontal offset, by a computer simulation using dynamic models. The behavior was followed until both vehicles came to a complete stop. Computational results agreed well with experimental data. Dynamic behavior of these vehicles such as deceleration, max. roll angles and permanent deformation forms, was calculated under the conditions that the collision speed, angle and position were varied. 9632785 A Study O n Behaviour of C a r a n d Driver in the Very Small C o m m u t e r C a r made of F R P during Collision using Scale Model Hideo Sakai, Masaaki Morisawa, Toshio Yoshino (Musashi Institute of Technology), Takeshi B. Sato (Keio Gijuku University), Akio Nakamura (MEITEC) In this study, after having performed simulation which used scale models substituting for a full scale commuter car made of FRP, we carded out collision tests with a barrier. We studied the occupant safety by changing the collision speed and the deformation characteristics of the seat belt, during head-on barrier collision using one-fifth scale models. To make this study more real we used the model driver having the characteristics of thorax deformation. In this case, the degrees of the occupant's injuries were estimated using HIC values of the head, 3msecG and maximum deformation of the thorax. 9632794 Surrounding Recognition of Mitsubishi ASV Takahiro Maemura, Tetsushi Mimuro, Yoshiki Miichi (Mitsubishi Motors Corporation), Toshiharu Hirai (MMC Computer Research) Mitsubishi ASV (Advanced Safety Vehicle) has adopted many advanced safety functions, including collision warning and automatic collision avoidance. This paper describes the surrounding sensing and recognition system of the ASV. The sensor fusion system for surrounding detection, called "Multi-Eye System", consists of lane detecting cameras, scanning laser radars, passive trigonometric-type sensors and stereo cameras. The main feature of the recognition system is lane-based data processing. Lane coordinate description of detected obstacles simplifies the topological relation between an obstacle and the ASV. Adaptive range cut, called "lane-cut", reduces road-side noise remarkably. 9632802 Development of Recognition Algorithm for Crossing Pedestrian Using Laser Radar System Tomohiko Adachi, Tohm Yoshioka, Satoshi Morioka, Satom Matsuoka (Mazda Motor Corporation) We have developed a system called "Auto-brake System for Collision Avoidance", which avoids collisions not only with vehicles but also with crossing pedestrians. In this paper, we describe the recognition algorithm for crossing pedestrians using a scanning laser radar. This algorithm comprises three functions, smooth tracking of position and velocity, calculation of lateral velocity relative to the vehicle's estimated path and target extraction according to the lateral velocity. 9632811 Active Suspension of Heavy Tracked Vehicle - Part 2: Vehide Test - Kiichi Kanagawa, Tomoaki Moil, Yukio lnoue, Takehiko