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A platform for research: civil engineering, architecture and urbanism
Study on the wrinkling behavior of perforated metallic plates using uniaxial tensile tests
https://orcid.org/0000-0002-8759-0597
Abstract The Yoshida buckling test (YBT) is a commonly used method to evaluate the wrinkling behavior of sheet metals; however, it is difficult to reflect the actual in-plane stresses in many sheet forming processes owing to the limited variation in the stress state. Furthermore, the test is impracticable for some low-ductility materials because fracture typically occurs before wrinkling. This paper proposes an approach for examining the wrinkling properties of sheet metals using uniaxial tension of plates with a central cut-out; a relevant wrinkling model is established using stress analysis of a finite perforated plate and an energy method. The results show that the typical stress distribution modes around the central hole before wrinkling are biaxial compression in the top/bottom domains and biaxial tension in the lateral domains, and the mode changes with the hole size and tensile displacement. The ratio of transverse to axial stresses increases with the diameter/width ratio; this leads to a larger influence of transverse nonuniform compressive stress, consequently decreasing the critical wrinkling stress. The wrinkling tendency in perforated sheets is more sensitive than that in a conventional YBT specimen; thus, it can be used to capture the subtle distortion of wrinkling for low-ductility materials. A second wrinkling phenomenon that occurred in plates with large holes under a large tensile displacement was observed and addressed.
Highlights A new buckling testing method using perforated plates under tension was proposed. A wrinkling model of perforated plates under nonuniform compression is established. The hole incurs complex stress distributions and contributes to wrinkling tendency. Effects of hole size and loading condition on stress and wrinkling are studied.
Study on the wrinkling behavior of perforated metallic plates using uniaxial tensile tests
https://orcid.org/0000-0002-8759-0597
Abstract The Yoshida buckling test (YBT) is a commonly used method to evaluate the wrinkling behavior of sheet metals; however, it is difficult to reflect the actual in-plane stresses in many sheet forming processes owing to the limited variation in the stress state. Furthermore, the test is impracticable for some low-ductility materials because fracture typically occurs before wrinkling. This paper proposes an approach for examining the wrinkling properties of sheet metals using uniaxial tension of plates with a central cut-out; a relevant wrinkling model is established using stress analysis of a finite perforated plate and an energy method. The results show that the typical stress distribution modes around the central hole before wrinkling are biaxial compression in the top/bottom domains and biaxial tension in the lateral domains, and the mode changes with the hole size and tensile displacement. The ratio of transverse to axial stresses increases with the diameter/width ratio; this leads to a larger influence of transverse nonuniform compressive stress, consequently decreasing the critical wrinkling stress. The wrinkling tendency in perforated sheets is more sensitive than that in a conventional YBT specimen; thus, it can be used to capture the subtle distortion of wrinkling for low-ductility materials. A second wrinkling phenomenon that occurred in plates with large holes under a large tensile displacement was observed and addressed.
Highlights A new buckling testing method using perforated plates under tension was proposed. A wrinkling model of perforated plates under nonuniform compression is established. The hole incurs complex stress distributions and contributes to wrinkling tendency. Effects of hole size and loading condition on stress and wrinkling are studied.
Study on the wrinkling behavior of perforated metallic plates using uniaxial tensile tests
https://orcid.org/0000-0002-8759-0597
Abstract The Yoshida buckling test (YBT) is a commonly used method to evaluate the wrinkling behavior of sheet metals; however, it is difficult to reflect the actual in-plane stresses in many sheet forming processes owing to the limited variation in the stress state. Furthermore, the test is impracticable for some low-ductility materials because fracture typically occurs before wrinkling. This paper proposes an approach for examining the wrinkling properties of sheet metals using uniaxial tension of plates with a central cut-out; a relevant wrinkling model is established using stress analysis of a finite perforated plate and an energy method. The results show that the typical stress distribution modes around the central hole before wrinkling are biaxial compression in the top/bottom domains and biaxial tension in the lateral domains, and the mode changes with the hole size and tensile displacement. The ratio of transverse to axial stresses increases with the diameter/width ratio; this leads to a larger influence of transverse nonuniform compressive stress, consequently decreasing the critical wrinkling stress. The wrinkling tendency in perforated sheets is more sensitive than that in a conventional YBT specimen; thus, it can be used to capture the subtle distortion of wrinkling for low-ductility materials. A second wrinkling phenomenon that occurred in plates with large holes under a large tensile displacement was observed and addressed.
Highlights A new buckling testing method using perforated plates under tension was proposed. A wrinkling model of perforated plates under nonuniform compression is established. The hole incurs complex stress distributions and contributes to wrinkling tendency. Effects of hole size and loading condition on stress and wrinkling are studied.
Study on the wrinkling behavior of perforated metallic plates using uniaxial tensile tests
Tang, Haoxing (author) / Wen, Tong (author) / Zhou, Yin (author) / You, Jianhao (author) / Ma, Desong (author)
Thin-Walled Structures ; 167
2021-06-30
Article (Journal)
Electronic Resource
English
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