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c*******d 发帖数: 1197 | 1 【 以下文字转载自 NanoST 讨论区 】
发信人: colinliud (hed), 信区: NanoST
标 题: 有没有做nanoindentation实验,测杨氏模量的
发信站: BBS 未名空间站 (Thu Jan 28 18:27:20 2010, 美东)
用的是MTS nano xp,测得的杨氏模量我直接用作sample的模量值;
但是看到paper中(oliver and pharr方法衍生的一系列方法),都是讲从unloading
curve来获取数据,计算模量,里面用的是reduced modulus,
想问一下这个reduced modulus就是indentation测得的值吗?(如果忽略indenter的影
响)。
简单点说,就是通过indentation测出数据就可以当初sample的杨氏模量吗? 还是要把
从unloading curve中获取的数据再通过 oliver and pharr提出的方程 计算后再获得?
可能说的有点语无伦次,但是我想做过indentation的高手应该能看清楚吧,呵呵! | g*****g 发帖数: 390 | 2 first of all, I don't know the paper you mentioned at all, but I did a
little nano-indentation before, so I will try to share what I know with you
and hope it helps.
Assume the workpiece is elastic-plastic material and indenter is rigid. So
in the process of indentation, you know the force, the displacement of
indenter and so the indentation the indenter made. When you unload, the
elastic recovery is working. When you pull out indenter completely, you can
get the final indentation by imaging tec |
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