J-20 5th Generation Fighter VII

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CasualObserver

CasualObserver

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Scchwerter_ said:
I respectfully advice you to read this paper on additive manufacturing published by SAC before commenting. Part 4 specifically since you seem to question the advantages of 3D printing. Personally I’d call “22.5% weight decrease, 97% parts count decrease, significant reduction on stress concentration, 88 less areas of stress weakness and 264 fewer fasteners” a significant improvement caused by switching from a traditional design to a monolithic 3D printed structure.

As for why only SAC and CAC seem to be interested in additive manufacturing when nobody else is, there can be a whole range of possible answers including but not limiting to: other nations are in fact also interested, SAC & CAC may be leading in this area of aircraft manufacturing technology, metal 3D printing of large force-bearing parts in aircraft manufacturing is a relatively new tech and most other foreign planes are designed well before this tech is practical, etc.
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Hi, is there an English version of this article?
 
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taxiya

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Scchwerter_ said:
I respectfully advice you to read this paper on additive manufacturing published by SAC before commenting. Part 4 specifically since you seem to question the advantages of 3D printing. Personally I’d call “22.5% weight decrease, 97% parts count decrease, significant reduction on stress concentration, 88 less areas of stress weakness and 264 fewer fasteners” a significant improvement caused by switching from a traditional design to a monolithic 3D printed structure.

As for why only SAC and CAC seem to be interested in additive manufacturing when nobody else is, there can be a whole range of possible answers including but not limiting to: other nations are in fact also interested, SAC & CAC may be leading in this area of aircraft manufacturing technology, metal 3D printing of large force-bearing parts in aircraft manufacturing is a relatively new tech and most other foreign planes are designed well before this tech is practical, etc.
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Those foreign planes are designed long ago but their manufactures did not stop improving them by attempting 3D printing. They tried and failed, and still couldn't do it after more than 10 years.

One example is AeroMet who tried low volume production of many load bearing 3D printed components for F/A-18E/F in 2001, being the FIRST in the world to do it. Even after HIP and open-die forging post-treatment, the components were proven to be far inferior to forging process in performances such as fatigue. AeroMet went bankrupted in 2005.

Wang Huaming used AeroMet as the example in both his presentation video and paper (2009) to tell his achievement that he did what AeroMet failed. Maybe Tirdent is from AeroMet, the wound is so deep that he can not believe that this challenge is beaten by someone else. :D
 
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