An efficient algorithm to estimate optimal preform die shape parameters in forging
An optimisation method for design of intermediate die shapes needed in some forging operations is presented. The basic problem consists of finding an optimal two-step forging sequence by automatically designing the shape of the preforming tools. The optimisation problem is defined based on an invers...
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| Veröffentlicht in: | Engineering computations 2001-01, Vol.18 (8), p.1057-1077 |
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| container_title | Engineering computations |
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| creator | Castro, Catarina F. Costa Sousa, Luísa António, C.A.C. César de Sá, J.M.A. |
| description | An optimisation method for design of intermediate die shapes needed in some forging operations is presented. The basic problem consists of finding an optimal two-step forging sequence by automatically designing the shape of the preforming tools. The optimisation problem is defined based on an inverse formulation. The objective function of the optimisation problem is a function describing the quality of the obtained part by measuring the die underfill. The finite element method is used to simulate the forging problem. The optimisation method is based on a modified sequential unconstrained minimisation technique and a gradient method. The sensitivity-dependent algorithm requires computing the derivatives of the objective function with respect to the design variables defining the preform shapes. A direct differentiation method has been developed for this purpose. The optimisation scheme is demonstrated with two axisymmetric forging examples in which optimal preform dies are obtained. |
| doi_str_mv | 10.1108/02644400110409168 |
| format | Article |
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The basic problem consists of finding an optimal two-step forging sequence by automatically designing the shape of the preforming tools. The optimisation problem is defined based on an inverse formulation. The objective function of the optimisation problem is a function describing the quality of the obtained part by measuring the die underfill. The finite element method is used to simulate the forging problem. The optimisation method is based on a modified sequential unconstrained minimisation technique and a gradient method. The sensitivity-dependent algorithm requires computing the derivatives of the objective function with respect to the design variables defining the preform shapes. A direct differentiation method has been developed for this purpose. The optimisation scheme is demonstrated with two axisymmetric forging examples in which optimal preform dies are obtained.</description><identifier>ISSN: 0264-4401</identifier><identifier>EISSN: 1758-7077</identifier><identifier>DOI: 10.1108/02644400110409168</identifier><language>eng</language><publisher>Bradford: MCB UP Ltd</publisher><subject>Algorithms ; Deformation ; Design engineering ; Design optimization ; Differentiation ; Engineering ; Finite element analysis ; Forging ; Inverse problems ; Mechanics ; Metal forming ; Methods ; Numerical analysis ; Optimization ; Simulation ; Studies ; Underfill</subject><ispartof>Engineering computations, 2001-01, Vol.18 (8), p.1057-1077</ispartof><rights>MCB UP Limited</rights><rights>Copyright MCB UP Limited (MCB) 2001</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c480t-f61678a4f37bf05877b7f80e124e1ae4d60a0ed44fbadbec196bc84447538553</citedby><cites>FETCH-LOGICAL-c480t-f61678a4f37bf05877b7f80e124e1ae4d60a0ed44fbadbec196bc84447538553</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.emerald.com/insight/content/doi/10.1108/02644400110409168/full/pdf$$EPDF$$P50$$Gemerald$$H</linktopdf><linktohtml>$$Uhttps://www.emerald.com/insight/content/doi/10.1108/02644400110409168/full/html$$EHTML$$P50$$Gemerald$$H</linktohtml><link.rule.ids>314,776,780,961,11614,27901,27902,52661,52664</link.rule.ids></links><search><creatorcontrib>Castro, Catarina F.</creatorcontrib><creatorcontrib>Costa Sousa, Luísa</creatorcontrib><creatorcontrib>António, C.A.C.</creatorcontrib><creatorcontrib>César de Sá, J.M.A.</creatorcontrib><title>An efficient algorithm to estimate optimal preform die shape parameters in forging</title><title>Engineering computations</title><description>An optimisation method for design of intermediate die shapes needed in some forging operations is presented. The basic problem consists of finding an optimal two-step forging sequence by automatically designing the shape of the preforming tools. The optimisation problem is defined based on an inverse formulation. The objective function of the optimisation problem is a function describing the quality of the obtained part by measuring the die underfill. The finite element method is used to simulate the forging problem. The optimisation method is based on a modified sequential unconstrained minimisation technique and a gradient method. The sensitivity-dependent algorithm requires computing the derivatives of the objective function with respect to the design variables defining the preform shapes. A direct differentiation method has been developed for this purpose. The optimisation scheme is demonstrated with two axisymmetric forging examples in which optimal preform dies are obtained.</description><subject>Algorithms</subject><subject>Deformation</subject><subject>Design engineering</subject><subject>Design optimization</subject><subject>Differentiation</subject><subject>Engineering</subject><subject>Finite element analysis</subject><subject>Forging</subject><subject>Inverse problems</subject><subject>Mechanics</subject><subject>Metal forming</subject><subject>Methods</subject><subject>Numerical analysis</subject><subject>Optimization</subject><subject>Simulation</subject><subject>Studies</subject><subject>Underfill</subject><issn>0264-4401</issn><issn>1758-7077</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqNkU1PGzEQhq2qSKTQH9CbxaG9sDD-WNscEWoTRCQkFNGj5d0dB8N-1d5I8O9xlIpDU9GexqN53hnPO4R8YXDGGJhz4EpKCZATCRdMmQ9kxnRpCg1afySzbb3IADskn1J6BAAtBMzI3WVP0ftQB-wn6tr1EMP00NFpoJim0LkJ6TBuHy0dI_ohdrQJSNODG5GOLroOJ4yJhp7m4jr062Ny4F2b8PPveERWP76vrhbF8nZ-fXW5LGppYCq8YkobJ73QlYfSaF1pbwAZl8gcykaBA2yk9JVrKqzZhapqk5fUpTBlKY7It13bMQ6_NvmztgupxrZ1PQ6bZLUUgm_tyOTXd0luJIdSlv8GlRHMGJPBkz_Ax2ET-7yt5Sw3UgA8Q2wH1XFIKXtnx5h9jC-Wgd0eze4dLWuKnSakCZ_fBC4-WaWFLq38ya2aL-75zUpZnXnY8dhhdG3zXyNO_y7ZQ-3YePEKLcWynA</recordid><startdate>20010101</startdate><enddate>20010101</enddate><creator>Castro, Catarina F.</creator><creator>Costa Sousa, Luísa</creator><creator>António, C.A.C.</creator><creator>César de Sá, J.M.A.</creator><general>MCB UP Ltd</general><general>Emerald Group Publishing Limited</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>0U~</scope><scope>1-H</scope><scope>7SC</scope><scope>7TB</scope><scope>7WY</scope><scope>7WZ</scope><scope>7XB</scope><scope>8AO</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BEZIV</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>F~G</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JQ2</scope><scope>K6~</scope><scope>K7-</scope><scope>KR7</scope><scope>L.-</scope><scope>L.0</scope><scope>L6V</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>M0C</scope><scope>M0N</scope><scope>M2P</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PQBIZ</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>Q9U</scope></search><sort><creationdate>20010101</creationdate><title>An efficient algorithm to estimate optimal preform die shape parameters in forging</title><author>Castro, Catarina F. ; 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The basic problem consists of finding an optimal two-step forging sequence by automatically designing the shape of the preforming tools. The optimisation problem is defined based on an inverse formulation. The objective function of the optimisation problem is a function describing the quality of the obtained part by measuring the die underfill. The finite element method is used to simulate the forging problem. The optimisation method is based on a modified sequential unconstrained minimisation technique and a gradient method. The sensitivity-dependent algorithm requires computing the derivatives of the objective function with respect to the design variables defining the preform shapes. A direct differentiation method has been developed for this purpose. The optimisation scheme is demonstrated with two axisymmetric forging examples in which optimal preform dies are obtained.</abstract><cop>Bradford</cop><pub>MCB UP Ltd</pub><doi>10.1108/02644400110409168</doi><tpages>21</tpages></addata></record> |
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| source | Emerald A-Z Current Journals |
| subjects | Algorithms Deformation Design engineering Design optimization Differentiation Engineering Finite element analysis Forging Inverse problems Mechanics Metal forming Methods Numerical analysis Optimization Simulation Studies Underfill |
| title | An efficient algorithm to estimate optimal preform die shape parameters in forging |
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