機械工学が人間にとって有用な仕事をする機械を作ることが大きな目的とすれば,材料力学は,有用な仕事をする機械の設計製作において, 機械が壊れないで安全に作動するための力学的基礎を与える学問体系である. この古く歴史ある学問体系は機械工学の柱の一つであり,日本機械学会のアンケートによれば大学卒業後数年以内の若手技術者の60%以上が大学時代の材料力学の 重要性を挙げているほど,産業界での材料力学の重要性は顕著である. 近年,計算機の目覚ましい発展に伴い,計算力学が材料力学を基礎とする一学問領域として発展しており,複雑な構造物の高精度な強度,機能と健全性評価に必須となってきている. 多方面で計算力学手法の一方法である有限要素法等による設計ならびに強度評価に利用されるようになってきている.
If the major purpose of Mechanical Engineering is to establish machines which work functionally for supporting the mankind, then the Mechanics of Materials is an academic framework to provide the fundamental of the mechanics for ensuring that the machines can work properly and safety without any breaks by proper design and manufacture. This old and historical framework is one of huge columns in Mechanical Engineering. According to the questionnaire survey by the Japan Society for Mechanical Engineers, more than 60% of young engineers consider the knowledge of the Mechanics of Materials is the most important within a few years after their graduation. This means an importance of the Mechanics of Materials is remarkable among the industries. Recently, the computational mechanics develops as one of academic fields on the basis of the Mechanics of Materials with the remarkable progress of computers. It is required to estimation strength, function and integrity for the machines with complex structures by a higher precision. In the multi-fields of the industry, the finite element method, one of analysis methods based on the computational mechanics, is often employed for a design and an evaluation of the strength for the machines.
一方,社会のニーズは激変しており,計算力学的手法を用いた評価についてもより高精度な結果が求められている.最近の機械工学の広範囲な発展から,強度,機能および健全性評価の対象が,通常の金属材料はもちろんのこと,生体,高分子,相変態が発生する高機能材料等,複雑な微視構造をもつ材料へ展開されており,さらに機械の使用条件もますます過酷化し,より高温,高速等の極限状態へと変化している.
On the other hand, much higher precision in the analysis method is strongly required because of the drastic changes in the needs of society. From an extensive development in the Mechanical Engineering, a target of the evaluations should be extended to the materials with a complex microstructure such as biomaterials, polymeric materials, and high-functional materials by phase transformation. Moreover, environmental conditions for a use of machines are much more severe and changing to a limit condition such as high temperature and high velocity.
このような状況の中で,本研究室は,機械工学の基幹科目である材料力学を基礎として,固体力学,構造力学および計算力学の基礎原理から応用までを修得させ,極限的な機械に対する機能的かつ強度的に安全,健全かつ全く新しい機械システムを創造し,設計できる能力を涵養することを目標としている.また,研究を通じて,自ら問題を発見し,その問題を解決できる能力を養うことは重要な教育目標である.
In such situations, our laboratory has a mission to let students acquire the knowledge from the fundamental principle of solid mechanics, structural echanics and computational mechanics based on the Mechanics of Materials, which is the column of the Mechanical Engineering, and to cultivate the ability of students to apply theory to practice, so that they can create and design novel, integral, safety and complete mechanical systems with higher function and strength under the limit condition. Furthermore, the other important mission from the educational viewpoint of our laboratory is to let students develop the capability to discover and solve problem by themselves through conducting their research work.
上記能力を有する学生を育成するため,学生と共同で材料力学的手法による強度評価,計算力学,有限要素法,マイクロメカニクス,漸近展開型均質化法などの手法を用いて固体系,構造系の静・動力学の解析方法について基礎的研究を行う.得られた成果をコンピューターコードに実装し,計算システムを開発する.さらに,各種機械システムの分野において,開発した計算システムを用いた応用研究を行う.
In order to raise the student to the one who has the above-mentioned capability, in collaboration with the students, a fundamental study about the analysis methods of statics and dynamics in solids, structures and a multi-body connected systems are conducted by using techniques, such as the strength evaluation based on the Mechanics of Materials, computational mechanics, the finite element method, micromechanics, asymptotic homogenization method, etc. The obtained result is implemented into computational code and a computational system is developed. Furthermore, the applied research work using the developed computational system is conducted in the field of various mechanical systems.
以上,本教育科目では,機械設計製作にあたっての,強度,機能および健全性評価への社会の多様なニーズへ積極的に対応する研究を行うことを目標とするとともに,材料力学を基盤とした関連分野である計算力学,固体力学も担当科目とし,これらが相互に有機的にリンクし,機械の変形と強度解析について学生が深く理解できるようなメニューを用意する.担当講義科目において,高い水準にまで学生を教育することも同様にミッションの一つと考えている. さらに,材料力学の手法を基礎とした新しい研究分野を開拓し,発展させることによって,学生の研究能力の涵養を図るとともに,得られた研究成果は論文や報告書等の形で公表することにより社会に貢献することを他のミッションとしている.
As mentioned above, while we have the missions of conducting research works which corresponds actively to the various needs of the society for the strength, the function, and integrity evaluation in designing and manufacturing machines, the computational mechanics, solid mechanics and related fields based on the Mechanics of Materials are also lecture courses in our duty, and we prepared the menu which lecture courses link each other meaningfully to make the students have a deeper understanding of deformation and strength analyses of machines. In the lecture course in our duty, to raise students to the people who own high quality and knowledge is also considered as one of our mentions. Furthermore, another mission of us is cultivating the research competency of students by pioneering a new field of research works and extending it on the basis of the technique of the Mechanics of Materials. The obtained results of research works are using as a contribution to society by opening officially in the form of a paper, a report, etc.
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