Tags » Output

Oil producers to extend output curbs at Opec meeting

(Source: www.businesstimes.com.sg)

Oil producers inside and outside the Opec cartel have little choice but to extend their deal from late 2016 curbing output when they meet in Vienna on Thursday, analysts say. 517 more words

Money Matters

10. Week 7

I feel like this week escalated from 1 to 100 very quickly 😂🙈

The beginning of the week was very quiet. Just work and class. The weather this week was really nice, highs of 34 degrees! 604 more words

New York

OPEC could maintain discipline through the end of the year

(Source: www.businessinsider.com)

The oil market outlook is always a bit complicated, in part due to the impact OPEC can have on balances. For all the attention paid to changes in U.S. 226 more words

Money Matters

2017年5月22日 星期一

abaqus 应力场分析

1、统一的图例/标尺

如图所是右侧一个图例是之前设置好后截图的效果,和中间设置效果对比可知,只要每次在图例的设置中设置好等值线的数量:BASIC-CONTOUR INTERVALS-DISCRETE-24;然后在LIMITS上下限的选项单改上下限为2000、-3000,全部勾选上show location,apply后的效果和右侧截图相同。

注意,超出上限的部分全部以灰色显示,低于下限的全部以黑色显示,因此必须对所有要加入对比的结果进行预先的调查,找到一个适合的上下限,再进行设置。

图例的统一是至关重要的,他将不同模型的不同时刻的应力等值线的值进行了统一,同一种颜色的等值线就是对应唯一的应力数值,该等值线所包围的区域越大,说明应力越大。

2、寻找合适的截面获得信息

首先,将刻划的位移量和刻划深度以整数对应起来是非常便利的设置方法。比如在以下模型中,U3位移为0.01mm的时候,刻划深度U2为0.0005mm,因此0.008mm位移时,深度为0.0004mm。

注意,选取z=0.01的截面进行分析,可以获得设计实验时想获得的“500nm深刻划应力场”的数据,但是相比而言,z=0.008截面经历过刻划前、中和后3个阶段的状态,更能反映刻划过程的应力场变化。因此,这两个面上获取的信息都非常有用。另外,还有Y0Z平面也需要进行仔细分析。

注意2:关于不同刻划深度时应力场分布的大小,实际上是有很多不同之处的。考虑2um的压头从浅到深刻划了500nm;再考虑一个压头的钝圆半径,一边刻划,钝圆半径一边从0增大到500nm,最终刻划深度当然也是500nm。这两种情况下的应力场分布极其不同,后者再深度增加的事后,钝圆半径也在增大,其应力场近似于等比缩放(小球压入深度浅,大球压入深度大,但只要保持压入深度和半径的比率相同,应力场的分布也只是近似放大而已,没有空间分布上的大差异),而前者则是从一小个球面的压入一直过渡到一个半球,压头接触部分的形状不停地发生改变。(如果无法理解这段文字可以去死了)因此研究不同下压深度的应力场分布差异,也是有很大意义的。

3、以动态的方式迅速读懂结果

选好截面,设置好统一标尺以后,可以进行动态的结果输出,输出为avi后可以随时对视频截图。同时,动态的结果更能展示变化的趋势。

很明显地,右侧先刻划产生的应力场因受到第二次刻划时候的应力场影响,应力大小都同时降低了。(即等值线包围的区域缩小了)

4、简单分析结果
  • 先后和同时刻划

比如下图为先后刻划0.008截面的应力场:

不管是4um的还是5um的顺序刻划,其中央部分的应力都是+500以下。但是将5um间距的同时刻划和5um的先后刻划结果进行比对,结果却有很大不同:

无法描述应力的分布是否有很大不同,但是至少拉应力都普遍更大。

Abaqus

May 22, 2017 at 03:24AM

#How #to #Learn #AngularJS – Your #AngularJS Sherpa by @barkinet

Learning AngularJS can be complex. There are an overwhelming number resources available on the web. The blog posts can be conflicting and confusing, and a simple google search can turn up 5 articles all describing the same thing in a completely different way. 6,030 more words

#HMKINGMEDVI 👑🇲🇦🌹❤️💯 By @barkinet "Skipper" ( 6 ) #Lodge Them [in A Section] Of Where You #dwell Out Of Your Means And Do Not Harm Them In Order To Oppress Them. And If They Should

MERGE, OUTPUT and $Action

Recently I’ve been making a lot of use of the OUTPUT option for insert and update actions. From this work I’ve already posted about the behaviour of IDENTITY and suchlike. 792 more words

SQL

# DECISIONS DETERMINES DESTINIES#

“You are not the victim of the world but rather the master of your own destiny. It is your choices and decisions that determines your destiny. 112 more words

Motivation