And the background is we came up with this rather complex challenge and to solve it we started simply with a 2D plate with a hole and then we moved to something axisymmetric and then at the very end we were able to check it against this real model and we knew it could be right because of the background of doing the 2D plate and the 2D axisymmetric.

この複雑な課題を解決するために、私たちは単純に穴の開いた2Dのプレートから始めて、軸対称のものに移行しました。そして最後の最後に、この実際のモデルと照らし合わせることができました。

So let me show you where we started from.

では、どこからスタートしたかをお見せしよう。

So this was where the initial challenge was, it's a nonlinear analysis, it's called contact and this is a helicoil and this is a preloaded setup where we're preloading the thread through this section and the stresses and we were a little bit unsure if the stresses were correct and so we wanted to do a vector plot.

これは非線形解析で、接触と呼ばれるものです。これはヘリコイルで、この部分に糸を通して予荷重をかけたセットアップで、応力が正しいかどうか少し自信がなかったので、ベクトルプロットを行いたいと思いました。

So we backed up, it's okay, let's do something that we know and this is where it's a standard hole in a plate, 2D, and we know we should have a stress concentration of 3 in the pattern.

そこで、私たちはバックアップを取り、私たちが知っていることをやってみましょう。これはプレートの標準的な穴で、2Dです。

But to do the vectors, we go in, we'll turn on arrow and we'll go down to contour arrows like that and we're going to do 2D components like that and this is where you set up how you want to see it.

しかし、ベクトルを表示するには、矢印をオンにして、輪郭の矢印を表示させ、2Dコンポーネントを表示させます。

We'll do double andered, we'll do it at the center, okay, and arrow will be components and you go to advanced options and this was the key is that the output vectors on arrow one is really going to be two vectors in the y and the x like that and this is the trick.

矢印はコンポーネントになり、詳細オプションに進みます。これが重要なのですが、矢印1の出力ベクトルは、実際にはこのようにyとxの2つのベクトルになります。

So, and by the way, we have to turn on transform because they're plates and otherwise the stresses are going to be an individual plate coordinate system so this is in the y like that.

ところで、プレートなのでトランスフォームをオンにしなければなりませんが、そうしないと応力が個々のプレート座標系になるので、このようにyになります。

So the transformation is important, you get the transformation right and you pick everything else, you're going to get this and one of the ways we checked it is that we knew this on top had to be 1,000 because that's what we set the stress.

つまり、変形が重要で、変形を正しく行い、他のすべてを選択すれば、このようになるのだ。

So this is the utility of doing a problem, you know exactly what the result should be so you can say, okay, I got the vector in the right direction, I got it set to 1,000 and then when you go down here, it all makes sense and I hit control G there to redraw and it's at the centroid and that's why it's not showing 3,000 here but the direction is right and as we'd expect, it's compression up here.

これは問題を解くことの有用性で、結果がどうあるべきかを正確に知っているため、「よし、ベクトルを正しい方向に向け、1,000に設定した。

So we got that figured out.

だから、それを理解したんだ。

Then, since the problem was actually symmetric, that was a little bit harder because it's more of a 3D and you just can't pick the vector direction, you have to align it to the material coordinate system and that's what we're showing here, this is the material coordinate system set in this thing, in this direction, vertical in the Z and that took a little while to figure out that, you know, 3D, you got to do a, you know, coordinate system.

というのも、ベクトル方向を選ぶことができず、マテリアルの座標系に合わせる必要があるからです。

Transform is in the material direction and then you go to contour arrows and like that, same setup.

変形はマテリアル方向で、それから輪郭の矢印に行き、同じように設定する。

We're going to do a vector of the axial and the radial and when that's set up, yes.

アキシャルとラジアルのベクトルを設定するんだ。

Now remember, this is actually symmetric so this is a hole, this is a hole in a solid chunk and so the theoretical stress concentration is 2, so 2,000 and but the stresses you see a little bit different angle, I'll hit control G to redraw the arrows and it's just what you'd expect like that and again, compressive and the material direction is shown, I hit F6 to bring up view options and you go down material direction, I can turn that off right there.

コントロールGを押して矢印を再描画すると、このように期待したとおりの応力が表示されます。

So there, then you just have nicer and these are, by the way, these are resultant arrows which means it takes two vectors and so it's always going to be positive.

つまり、これは2つのベクトルを取るということで、常に正になる。

So even though this is compressive stress here, it's going to show positive, same here and that's because it's resultant.

これは圧縮応力であるにもかかわらず、同じようにプラスを示す。

Now the coup de grace, the more complex and I have this set up to only show, you know, and that is via your contour options here, contour group is only active like that and now what we're doing is we want to show the vectorials like that and it's already set up.

輪郭のオプションで、輪郭グループはこのようにアクティブになっている。

It's set up the same way as the other one, just like this, 2D components and this is where this is really useful to dig into because on a situation like this, stress flows, it's like fluid, it's like a CFD plot and it has to behave like that and we have contact going on and so even though we don't get the positive, you can see how, isn't this beautiful the way this flows and right here, this is compressive even though and you can see what you would normal to this contact interface and then here you see the flow and the circulation and it's just great, it just makes perfect sense and this is one of the great utilities of doing this vector plot is that it really made sense about how the stresses would work and how it would flow.

このような状況では、応力の流れは流体のようなもので、CFDのプロットのようなもので、そのような振る舞いをしなければなりません、この接触界面が正常で、ここに流れや循環があるのがわかると思います。

Well, I'm 30 seconds over, I'm going to stop here and this is how to set up on a contour for doing vectors and also, we want to remind you guys, we have a lot of other tutorials and we have white papers and downloads and videos and all sorts of stuff to help you go through and we're here to support your efforts, so please reach out, call us if you're a client, if you're not a client, we welcome your business.

さて、30秒を過ぎましたので、この辺で止めます。これは、ベクターを行うための等高線での設定方法です。また、皆さんにお伝えしたいのですが、私たちには他にもたくさんのチュートリアルがあります。ホワイトペーパーやダウンロード、ビデオなど、皆さんの作業をサポートするためのあらゆるものがあります。

Have a great day.

良い一日を。

Bye-bye.

バイバイ。