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In this paper, mesoscopical models reflecting essential characteristic of various basic processes of metal sheet forming is put forward. Beeing different both from microscopical models that simply reflect the stress and strain status of every point in defrormation area,and from speciric models that reflect the deformation characteristics of various forming processes,these mesoscopical models reflect the essential characteristics of various basic forming processes abstractly and specifically,By theses mesoscopical models that rich in information,strain distribution in deformation area can be made clearly,stress and strain of critical points can be analyzed,and measures to improve the processes can be found helpfully.
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