prestrain 中文意思是什麼

prestrain 解釋
預應變
  1. The effects of baking temperature, baking time and prestrain on the bake hardenability and dent resistance of isotropic sheet steel and bh sheet steel produced by batch annealing were studied

    摘要研究了烘烤溫度、烘烤時間和預拉伸應變量對罩式爐退火工藝生產的各向同性鋼的烘烤硬化性的影響，並與力學性能相當的冷軋烘烤硬化鋼進行了對比。
  2. After pretorsion the successor tensile yield limit and strength limit both improved very highly, but the trend of the increase of the strength limit was suspended till the pretorsional capacity reached 17, when the pretorsional capacity was greater than17 ( prestrain value was 81. 19 % of total strain ), the successor strength limit rapid failed and approached the yield limit. this illustrate the a3 steel specimen translate from plasticity into friability after pretorsion strengthen. when the specimen was operated by tension - torsion action, the yield limit had very large improved, but the strength limit changed very little. furthermore, the trend of the increase of the strength limit was suspended till the pretension capacity reached 0. 25 ( prestrain value was 66. 93 % of total strain )

    A3鋼試件在預扭轉后，后繼拉伸屈服極限和強度極限均有很大提高，但強度極限的增大趨勢到預扭轉量為17為止，預扭轉量大於17 （預應變值為總應變的81 . 19 ）后強度極限迅速下降，與其屈服極限接近，這說明a3鋼試件經預扭轉強化后逐漸由塑性轉化為脆性。該預應變值為a3鋼試件的韌脆轉變點。 a3鋼試件在拉伸-扭轉作用下，屈服極限有很大提高，但強度極限沒有多大改變，而且，屈服極限的增大趨勢到預拉伸量為0 . 25應變（預應變量為總應變量的66 . 93 ）后就不再增加。
  3. A mean strain or prestrain, as in fig. 83, can under certain conditions reduce the subsequent fatigue life.

    一個如圖83所示的平均應變或預應變，在某種情況下，能夠縮短以後的疲勞壽命。
  4. Comparing with these several strengthen formal, towards strength limit ' s improvement, the effect of torsion - tension and tension - torsion - tension was close ; simply tension - torsion - tension required a little larger prestrain quantity. whereas, towards yield limit " s improvement, the effect of torsion - tension - tension action ' s strengthen was the best

    從幾種硬化形式的比較來看，對于強度極限的提高，扭轉-拉伸和拉伸-扭轉-拉伸的強化效果相近，只是拉伸-扭轉-拉伸所需的預應變量要大一些；而對于屈服極限的提高，扭轉-拉伸-拉伸作用下的強化效果最佳。
  5. Effect of prestrain on the reverse martensitic transformation of tini fibers embedded in al matrix

    合金絲馬氏體逆相變的影響
  6. Consider the total plasticity of these several kinds of prestrain a3 steel specimen. the total plasticity of tension - torsion - tension action was higher than that of torsion - tension and torsion - tension - tension action. but the max. values of their total plasticity were all greater than those of any single destructional form

    考慮幾種預應變下的a3鋼試件的總塑性，拉伸-扭轉-拉伸作用下的總塑性比扭轉-拉伸和扭轉-拉伸-拉伸作用下的總塑性有明顯的提高。但它們的總塑性的最大值都大於單一破壞形式下的總塑性。
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