โ Scribed by J.L. Duncan; R. Sowerby
No coin nor oath required. For personal study only.
Sheet metal parts are characterized by a complicated shape; the s t r a i n s involved i n forming r a r e l y exceed 20': but the displacements are large. d i t i o n s can cause large changes i n f a i l u r e rates. while the l i m i t a t i o n o f useful s t r a i n i n g i n sheet materials can be reasonably modelled, the determination o f s t r a i n d i s t r ibutions i n complex parts can not y e t be determined i n an accurate and economic fashion. gested t h a t the use o f these ideas leads t o tractable. approxiniate computer design aids for comp?ex shapes which can be used e f f e c t i v e l y by experienced designers.
Sheet forming operations are conducted close t o a f a i l u r e l i m i t and therefore small changes i n con-The various techniques employed as a basis for computer modelling of sheet forming are reviewed and i t i s concluded t h a t
The use o f i d e a l i z a t i o n s o f deformation processes, materials, forming operations and shapes i s introduced and i t i s sug-
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