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Lullabygxb铜虫 (小有名气)
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[求助]
[截面模量]帮忙：外导提问面试题目，有关截面模量的问题。
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2. Using everyday language, please explain the term ‘section modulus’ with regard to a meter stick and explain how it is that the section modulus can be changed even though the dimensions of the meter stick and the materials used in making the meter stick do not change. ----------------------------------------------------------------------------------------------- 我的理解：运用日常用语，请解释术语截面模量，假设一根米尺，请分析为什么当米尺的尺寸和材料都未发生改变的情况下为何截面模量会改变？ |
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Lullabygxb: 金币+5, ★★★★★最佳答案 2013-03-28 08:17:22
感谢参与，应助指数 +1
Lullabygxb: 金币+5, ★★★★★最佳答案 2013-03-28 08:17:22
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I got some thing online. Hope it's useful for you. Good luck! ----------------------------------------------------------------------------------- "The moment of inertia & section modulus provide information about the geometry of the shape being bent. The larger the value typically indicates a member that is more difficult to bend. The value is calculated based on which direction you are bending your material as well. Take a ruler and grab both ends like a beam. First hold it flat and try to bend it as if it had load on top. Now turn the ruler 90 degrees and try to bend it again. One direction is much stiffer than the other, this is due to the increased section modulus (moment of inertia) in one direction over another. " |
2楼2013-03-28 05:31:27
Lullabygxb
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3楼2013-03-28 08:19:30