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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2009.1
- 수록면
- 897 - 902 (6page)
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초록· 키워드
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Safe and robust process design relies on knowledge of the evolution of the mechanical properties in a tube
during hydroforming. The manufacturing of tubular shapes generally consists of three main stages: bending,
preforming, and expansion. The latter is usually called hydroforming. As a result of these three steps, the
final product’s strain hardening history is nonlinear. In the present study, the strain hardening behavior during
hydroforming was experimentally investigated. The variation of local flow stress and/or local hardness was
used as an index of the strain hardening during the various steps and the local flow stress and/or local hardness
were used with respective correlations to determine the effective strain. The strain hardening behavior during
hydroforming after preforming has been successfully analyzed by using the relationships between hardness,
flow stress, and effective strain for variable pre-strains prior to hydroforming. The comparison of predicted
hardness with measured hardness confirms that the methodology used in this study is feasible, and that the
strain hardening behavior can be quantitatively estimated with good accuracy.
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