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鍛打能增加密度嗎?請教 |
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點評
請教一下大俠,看到有"體積彈性模量"這個概念,那就是說不管在彈性還是塑性變形下鋼的體積或者密度都會發生微小的變化?簡單算了一下屈服時的變化量在0.001級別,是這樣么?
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