The present paper is concerned with the design of plane-strain bending wide sheets driven by sheet’s geometric shape after unloading. solution based on ideal flow theory. It determines loading path (the dependence between dimensionless moment and tensile force) that produces desirable shape. theory valid for rigid perfectly plastic material model. A method proposed in literature combines a at a...

the rings considered in this article are commutative with identity $1neq 0$. by a proper ideal of a ring $r$,  we mean an ideal $i$ of $r$ such that $ineq r$.  we say that a proper ideal $i$ of a ring $r$ is a  maximal non-prime ideal if $i$ is not a prime ideal of $r$ but any proper ideal $a$ of $r$ with $ isubseteq a$ and $ineq a$ is a prime ideal. that is, among all the proper ideals of $r$,...

Research partially supported by the NSF and AFOSR. Work supported in part by NSF and NATO. Work supported by DOE , under contract W-7405-ENG-36. Research partially supported by NSF and AFOSR.