Optimal Approximated Unfolding of General Curved Shell Plates Based on Deformation Theory  

Oleh:

Ryu, Cheolho ; Jong, Gye Shin

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Manufacturing Science and Engineering vol. 128 no. 1 (Feb. 2006), page 261-269.
Topik: DEFORMATION; approximated unfoldign; curved shell plates; deformation

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ93.8 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Surfaces of many engineering structures, especially those of ships and airplanes, are commonly fabricated as either single - or double - curved surfaces to meet functional requirements. The first step in the fabrication process of a three -dimensional design surface is unfolding or flattening the surface, otherwise known as planar development, so that manufacturers can determine the initial shape of the flat plate. Also a good planar development enables the manufacturer to estimate the strain distribution required to form the design shape. In this paper, an algorithm for optimal approximated development of a general curved surface, including both single - and double - curved surfaces, is established by minimizing the strain energy of deformation from its planar development to the design surface. The unfolding process is formulated into a constrained non linear programming problem, based on the deformation theory and finite element. Constraints are subjected to the characteristics of the fabrication method. Some typical surfaces, such as convex -, saddle -, and cylinder - type ones, as well as the surfaces of practical ships are unfolded using the proposed algorithm and the results show the effectiveness of this algorithm.

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