20489| 25
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鍛打能增加密度嗎?請(qǐng)教 |
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點(diǎn)評(píng)
請(qǐng)教一下大俠,,看到有"體積彈性模量"這個(gè)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(huì)發(fā)生微小的變化,?簡(jiǎn)單算了一下屈服時(shí)的變化量在0.001級(jí)別,,是這樣么?
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