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KAKEN_18K03881seika.pdf
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Download
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:539.5 KB
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:May 17, 2022 |
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Total downloads since May 17, 2022 : 163
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微視的変形機構を考慮したマルチスケール数値材料試験による一般化材料モデルの構築
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ビシテキ ヘンケイ キコウ オ コウリョシタ マルチ スケール スウチ ザイリョウ シケン ニ ヨル イッパンカ ザイリョウ モデル ノ コウチク
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Bishiteki henkei kikō o kōryoshita maruchi sukēru sūchi zairyō shiken ni yoru ippanka zairyō moderu no kōchiku
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Development of generalized material model by multi-scale numerical material testing considering microscopic deformation mechanism
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大家, 哲朗
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オオヤ, テツオ
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Ōya, Tetsuo
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慶應義塾大学・理工学部 (矢上) ・講師
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Research team head
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科研費研究者番号 : 10410846
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2021
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科学研究費補助金研究成果報告書
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2020
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車体等で近年使用が増加している難成形材のプレス成形の生産性を向上させるために，成形シミュレーションの基礎理論を根本から見直し，精度向上および力学的原理に則った加工プロセスデザイン支援を実現するための研究を行なった．そのため次の2課題，(1)材料微視構造に立脚した一般化材料モデルの構築，(2)一般化材料モデル活用を支援できる数値材料試験法の確立，に取り組んだ．(1)に関しては有限要素多結晶モデルを用いた検証により，構築したモデルが任意の付加経路の加工硬化を表現できることが確認できた．(2)については実材料データを用いた検討により，fccおよびhcp材料に対する提案手法の有効性が確認できた．
To improve the productivity of press forming of difficult-to-form materials, which have been increasingly used in recent years especially for car bodies, we have investigated the basic theory of forming simulation, and conducted research to realize support for forming process design. In order to achieve this, the following two subjects were addressed: (1) development of a generalized material model based on the microscopic structure of materials, and (2) establishment of a numerical material testing method that can support the use of the generalized material model. For (1), it was verified by using a finite element polycrystal model that the developed model can represent work-hardening of an arbitrary additional path. For (2), the effectiveness of the proposed method for fcc and hcp materials was confirmed by using actual material data.
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研究種目 : 基盤研究 (C) (一般)
研究期間 : 2018～2020
課題番号 : 18K03881
研究分野 : 塑性力学
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