自動車工学の進歩
オープンアクセス

概要

Effect of geometrical configuration on the impact performance of tubular jute mat/epoxy composite specimens

Sabah Salim Hamza, Alabama Emran Bin Ismail 1, Mohid. Yuhazli Yacoub, Salif Meri Al Absi

Nowadays, the interest in using natural fibers reinforced plastic have been increased dramatically in many engineering applications due to its distinctive properties such as low density, good Energy-absorbing capacity, and is considered environmentally friendly. In the present paper investigated experimentally the crashworthiness characteristics and corresponding energy-absorbing capability of different geometrical shapes under quasi-static loading of natural tubular jute mat/epoxy composite structures. The purpose is to determine the appropriate design of natural compounds, which can provide the potential to substitute structures currently in use. Two different geometrical shapes (corrugated and circular tubes) were fabricated by a combination manual lay-up and vacuum-bagging molding techniques, specimen thickness (2, 3 and 4 laminate plies), tulip triggering and 100mm in length, and then the post-curing has been conducted on graded temperature treatment. The influence of cross-section shape, number of laminate plies, and temperature treatment on crashworthiness characteristics under quasi-static loading were examined and discussed. From this unique study, Laboratory results indicate that most of the specimens failed in a stable and progressive manner. However, the corrugated cross-sectional shapes with three layers are considered optimum design in terms of energy-absorbing, peak load, average load, and crushing efficiency for crashworthiness tubes application.
Recently, interest in environmental problems has been increased among researchers; the natural fibers are gaining considerable attention by authors and manufacturers in the direction of replacement of synthetic composite fibers especially in the automotive industry field due to their characteristics such as lower weight, good in strength and elastic modulus, biodegradable, renewable, recyclable, ecofriendly, available abundantly, and low cost. Fundamentally, weight is a key criterion as well as to crashworthiness in the motor vehicle Engineering field. The minimum weight corresponds with a decrease in fuel consumption and carbon dioxide emissions, thus it contributes to the protection of the environment.
Nowadays, the usage of transportation, especially automotive have become an important part of daily life. However, the rapid development of the vehicle industry and increasing their numbers, so that drive to more traffic accidents, that lead to death or serious injuries .Therefore, the safety factor is a very
重要な問題です。耐衝撃性の主な機能は、衝撃エネルギーを吸収し、乗員室を保護し、衝突が発生した場合に乗員に伝達される最大力を低くすることです。金属や合成複合材料を使用して耐衝撃性のパフォーマンスに関する調査がいくつか行われてきましたが、天然複合繊維を使用した研究はわずかです。以前の研究によると、衝撃エネルギーの吸収を理解するには、材料の種類、断面形状、試験片の形状（層数、長さ、直径と厚さの比）に加えて、熱処理など、いくつかのパラメーターが選択されます。構造の耐衝撃性に影響するパラメーター（最大ピーク荷重（Pmax）、
平均荷重（Pm）、エネルギー吸収（EA）、および圧潰効率ɳcなど）が選択されます。
産業用途の一環として、天然複合構造を製造し、金属および合成複合製品の代替としてテストすることに大きな関心が寄せられています。著者らは、軸方向の圧潰挙動と総エネルギー散逸に関するこれらの研究を採用しています。発表された膨大な論文では、複合材および金属試験片の耐衝撃特性を調べるために準静的圧縮が使用されています。このアプローチの利点は、試験手順が低速で行われるため、破砕プロセスを制御し、試験サンプルの各段階の画像をキャプチャする手段が得られることです。したがって、壊滅的または非進行性の破損モードを示す複合材試験片を除外するより良い選択肢を提示できます。
索引用語—天然繊維、幾何学的形状、準静的、
耐衝撃性、エネルギー吸収、ピーク負荷