I think the following should work ... (see the attached image)

1) Divide the entire block by 3 and draw the horizontal lines, the height of the block is given be the height of the next block

2) Divide the entire block by vertical lines, each of the sub blocks is 4 times the width of the small blocks in the fine mesh

3) Divide the columns of the first and the second row by 2 and draw the vertical lines

4) Divide the first row by 2 and draw the horizontal line (start at half of outer block), regarding the lower half of the first row, divide each block by two and draw the vertical lines - except the very first block, each block of the first half of the lower row is now the width of the blocks from the fine mesh

5) Start from outer side of top row and draw one angle line (from the bottom middle to the top point) into each block, change the direction in every block (mid left, mid right, mid left ...)

6) Do exactly the same for the bottom half of the first row

E1: Now I see, I made a small mistake in step 4 ..h.mm lets fix it ...

E2: The same for first row ... I just saw there is another small mistake. If you draw the top horizontal line in step 1, keep free space and only draw from center to center (same as E1 for step 4)

7) When dividing the bottom row by 2 In step 4, dont draw the entire line, but just draw from center to center of the blocks and keep the free space

8) This should be it? (Except that mistake E2 is not fixed in the image)

Best,

Robert

Hi Abhishek,

are you looking for a specific solution in ABAQUS or are you looking for a general idea / description how to do this yourself?

Robert

Hi,

the basic appraoch would be to partition the model at different places where you want a uniform mesh and where you wnat to generate a graded mesh. Then you need to define the ratio at wich the element size should be de-/increased and assign the "mesh seeds". You can also define a fixed number of elements per edge. Then you can mesh the part and the result should be similar to what you see in the picture. For an identical mesh you would need the same pre-processor and details for the meshing parameter.

Best,

Sascha

As stated by Mr. Duczek, best way is to do partition and mesh the part

@Robert Fischer: I would like to know general procedure to get this kind of mesh. I need this kind of mesh for CZM where crack path isn't known.  I am attaching a more sample image of desired pattern of mesh. I am aware basics of partitioning, seeding edges or instances and biasing.

@Sascha Duczek : Sir I am aware of partition, seeding edges or giving biasing. I tried partitioning and then seeding edges for desired mesh pattern, it didn't work well.  

I am not able to get the transition layer between uniform fine and coarse mesh, where each square has three trapezoidal sized elements. 

I hope I understood it right. You need an idea how to generate the part marked with the red line? The rest is done?

@Robert Yes. 

Not sure if I am right, but look at the attached picture.

I think the height h of the block is the same as the height for the following block on top. Again I am not 100% sure, but it looks like if we divide h by three we get the two horizontal lines in green.

Do you agree?

I think the following should work ... (see the attached image)

1) Divide the entire block by 3 and draw the horizontal lines, the height of the block is given be the height of the next block

2) Divide the entire block by vertical lines, each of the sub blocks is 4 times the width of the small blocks in the fine mesh

3) Divide the columns of the first and the second row by 2 and draw the vertical lines

4) Divide the first row by 2 and draw the horizontal line (start at half of outer block), regarding the lower half of the first row, divide each block by two and draw the vertical lines - except the very first block, each block of the first half of the lower row is now the width of the blocks from the fine mesh

5) Start from outer side of top row and draw one angle line (from the bottom middle to the top point) into each block, change the direction in every block (mid left, mid right, mid left ...)

6) Do exactly the same for the bottom half of the first row

E1: Now I see, I made a small mistake in step 4 ..h.mm lets fix it ...

E2: The same for first row ... I just saw there is another small mistake. If you draw the top horizontal line in step 1, keep free space and only draw from center to center (same as E1 for step 4)

7) When dividing the bottom row by 2 In step 4, dont draw the entire line, but just draw from center to center of the blocks and keep the free space

8) This should be it? (Except that mistake E2 is not fixed in the image)

Best,

Robert

Here is a corrected version with some slight changes, I hope it is self-explanatory.

Robert

@Robert Thanks.

You are welcome!

Hi,

In accordance with your model, you can use adaptative meshing control. In this tutorial you can find an orientation.

Best wishes

http://imechanica.org/files/l6-adaptive-mesh.pdf

Dear Mr. Kumar

I was wondering have you been able to finally produce the same transition mesh, as was shown in the picture using ABAQUS/CAE?

Thanks

Akbar