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发表于 2005-6-20 05:08:10
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来自 美国
Re:【原创】一个塑性成形原理的思考题,答对的加分
Forming process can be classified into three groups:
Free of straining, fullly strained and in between.
sheet forming is free of straining, extrusion is fully strained while compression is in between.
In the compression, some section is in the hydrostatic pressure while some area is in the tensile status, like the wall area, between the billet wall hit the tooling contraining wall. This is the reason for the different your mensioned. |
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