(hoop stress).The main defects of deep drawn parts are wrinkling and/or necking. Wrinkling usually occurs at the flange region by excessivecompressive stressesleading to local buckling of the sheet. On the other hand, necking is due to the excessive radialtensile stress. These two defects, i....
By the early 1960s, many countries began to view their official dollar holdings as excessive. They worried that the US might be forced to devalue the dollar, saddling them with foreign-exchange losses. As the situation unfolded, some countries, led by France, sought to replace the dollar wit...
As amplitude was decreased and/or draw speed was increased (to 50 or 150 mm/s), the amount of force reduction increased. Sign in to download full-size image Sign in to download full-size image Figure 15.7. Tube drawing work from Sansome, University of Aston group. (a) Tube drawing ...
In addition to the above, pressure sensitive segments are excessively displaced in the case of excessive amount of strip material between the dies and this once again actuates the other lever for triggering the initiator.LAUCKNER,GERHARDZASKE,KLAUS-DIETER...
Increasing the size of a drawing by 20% will often increase the time to complete it by 50% or more, as the amount of detail is greatly increased. You reach a point where suggestion will no longer suffice and only direct depiction will do. Personally, I have a handy trick that I use....
Textures, for example, may be traced when the texture is significant to the image, but may be left out when the texture introduces excessive detail or is not a significant feature of the overall scene. These factors may be influenced not only by artistic judgment but also by well-established...
Magic wand: I will have the magic power to make plants and trees grow beautifully by having a protective shield to prevent excessive sun rays. Plants will flourish.”—Germaine Goh “Neo-Atlantis human.”—Jared Koh “Our skin will be able to dissipate heat and moisture so that we can ...
Therefore, an excessive emphasis on ease of use can be perceived as sacrificing creative potential, which in turn could affect designers’ intention to continue using the tool. 6.3.2. The Mismatch between High Skill Levels and Expectations of Ease of Use It is observed that designers typically ...
drawing ratio is calculated using surface areas. The limit to the drawing ratio for an operation is usually 2 or under. Actual limits to the amount of drawing possible are also dependant upon the depth of drawing, punch radius, die radius, anisotropy of the sheet and the blank's material....
Herein, sol-gel transition of 3,3′,4,4′-biphenyldianhydride (BPDA)/p-phenylene diamine (PDA) polyamic acid (PAA) solution were investigated by adding excessive dehydration reagent, and it was found that increasing the amount of dehydration reagent and pyridine content, as well as the temperat...