[題目] 算伸長量(材料力學)
[領域] 材料力學
[來源] 老師給的範例
[題目] 一根圓柱型鋁棒在上面做拉伸P=250KN
(1)the total elongation of the whole length AD under the load P
(2)the elongation of the whole length AD after P is released
附圖:http://www.flickr.com/photos/49572490@N05/4550635312/
[瓶頸] 我只會算兩種尺寸的 三種搞不懂
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