小李飛刀,飛刀千里殺
殺光光......哈哈 哈哈
網路上關於700K Carbon的資料Technically Perfect Points
21. Carbon fiber has the best stiffness-to-weight and strength-to-weight ratios of any frame material, with infinite fatigue life and a shock-damping capability 10-15 times that of metals. But not all carbon is the same - there are different grades of carbon, just as there are different grades of metals. We use two different grades of carbon fiber, 700K and 800K. The "K" is short for ksi, which denotes the material's tensile strength in thousands of pounds per square inch. So 700K carbon can withstand a tensile load of roughly 700,000 pounds per square inch of material. And 800K is even stronger, taking an 800,000-pound load. For comparison: chrome-moly steel falls into the 63-97 ksi range, 3Al/2.5V titanium is 73-90 ksi, 6Al/4V titanium is 128-138 ksi, 6061-T6 aluminum is 40/45 ksi, and 7075-T6 aluminum is 73-83 ksi.
But even more significant is stiffness, since a stiff frame that resists pedaling forces is a more efficient one. Carbon's stiffness trumps other frame materials, hands down. Our 700K carbon has a relative stiffness (or Elastic Modulus) of 33.4 million pounds/square inch (msi), and the 800K fiber we use is 42.7msi. (Chrome-moly steel, the stiffest metal used in bicycle frames, comes in at 29.7 msi, 3Al/2.5V titanium is 14.5 msi, 6Al/4V titanium is 16.5 msi, while 6061-T6 and 7075-T6 aluminum are 10.0 and 10.4 msi, respectively.)
㊣三重YA騎團㊣-精神同在組
Lanxlot5475 wrote:
今天前輩也跟我說,他說一支車架的藝術,除了形狀、幾何,更重要的是哪些地方要用怎樣的材料。
這在早期鋼管車就已經是這樣了,現在碳車就更加的複雜,不可能有單一材料做出來的碳車架。
恩恩,這段話說得很好
我打算以後花一整篇文章介紹碳車各個不同的地方需要怎樣的補強
例如五通、座管、前叉,這些地方
他們的受力方式完全不一樣,補強所需使用的碳纖維也是有很大的差別
今天如果有人都用相同的碳纖維補強方式,那大概一下子就會把碳纖維騎斷了吧.......
另外,碳纖維和金屬在設計上最大的差別
在於一個是均向性的材料,另一個是非均向性的材料
這兩者的差異讓碳車在設計上實在是一種藝術,而不僅僅是一種技術而已了
如果有人對這有興趣,我們再一起討論吧!!
---
風與杜鵑的對話
~ http://dahi30.pixnet.net/blog ~
關閉廣告