Never put off till tomorrow what you can do today

至理名言啊。可是,试验分析又拖了一天了。
Imagine my diamay when thinking of little work has been done since I came to NTU 3 years ago! What’s more, my english is still poor…
…Developed the 3D SPH program
…Implemented the plastic D-P similar consititutive model
…Implemented the penalty contact method ( not yet perfect)
…Considered heterogeneity models based on the material compositites
 
6.23的计划
1) Try new My-Jh2 model using AUTODYn
发现商业软件就是用的方便,比我自己开发写程序要快多了,修改个subroutine就可以了
结果跟我的程序几乎接近。想想看看,商业软件还是几年前的版本,sigh!
自己弄点东西就是麻烦啊
2) Find out bugs in my program
嗯,主要是,修改以后,发现死活结果不对了。本来是修改以后把接触,颗粒非均匀性,任意分段(力,速度)荷载一并考虑的。最后,用了一个比较工具,算是稀里糊涂找出来原因了。
接触怎么处理呢?动态情况下总是滞后,接触penalty number似乎总是不能自适应;用了,augmented-penalty方法,查出来,时间步长改变的时候程序有点小问题
其实调程序,主要是要关注小细节
3)using voronoi to simulate heterogeneity effects
结果不错,竟然准静态下得出的强度跟实验值比较吻合。但跟香港那个家伙用flac分析的不同
 

Granite heterogenious modelconsidering mineral composites
(Particles in different color denote different minerals)

Qausi-static brazilian splitting test
velocity=0.05m/s
(Red means fully damaged zone,in other word, crack)

Dynamic splitting test
with ramp load max velocity=1.0m/s
(Red means fully damaged zone,in other word, crack)
破坏模式,似乎crash zone同均值的区别较大,模型的scaled parameter取值的问题还没有很好的结论
说明了一些问题,强度有所增长
Granite cross section
 
Real one .vs. Generated one
 
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3 Responses to Never put off till tomorrow what you can do today

  1. says:

    看你做的东西具有成就感。

  2. wenwen says:

    我建议你把做出来的东西,还有想法,尤其是疑惑写在blog中,if possible, use English.以便认识,不认识的人都有更多的机会交流。自己编程序是有很大难度,别人做不到的,但是你做到了,你很棒的,加油啊!我是你背后坚强的支柱,有我在,福星在此哦!

  3. xuejun says:

    成果有了一点点,我很不善于总结的;要抓紧了

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