I liked the video, I am having a problem studying an assembly where one of the pieces is made of composite material. When placing the assembly in the ACP module, when I go to the setup only the part to which I am going to apply the composite material appears (I understand that it is because I defined it as a surface previously), but when I link the ACP module to the structural static I only see links the composite part and not the entire assembly.
Very comprehensive overview over some basic principles and analysis guidelines. Thanks a lot! I am interested in more details on when to use which failure analysis method. Any advice?
Nice video. Thank you. One question - how would you model a metal insert within sandwich panel? I'm trying to do it but can't get around one issue: My initial idea was to use solid modeling and assemble metal parts with solid composite parts in Static structural using contacts/bonding. 1. I created OSS that includes full face of the panel. I created top skin ply’s on that OSS 2. I created another OSS that covered full face but has a cutout region where metal insert should be placed. I created a core ply using this surface. 3. I created bottom skin ply's using first OSS (one that covers full face of the panel) 4. Now, when I try to create solid model, all is fine with top skin and core layer, but bottom skin has a hole/cutout in place where there’s no core. Any suggestions on how can I avoid this unwanted cutout in my “overcore” ply’s? What is the proper way to model such structures - sandwich panels with metal inserts? Update: Figured it out - using cutout feature in Create Solid Model branch solves this issue.
So, by the Tensile Strenght graph shown in minute 15:00, we can then claim that Carbon Fibre/Epoxy has a much lower value than Glass Fibre/Epoxy. Isn't this counter-intuitive to most tecnical documentation? As far as I know, Carbon Fibre/Epoxy is 'stronger' than Glass/Epoxy, isn't it?
I suppose that the property shown in the graph is the maximum tensile strength (the maximum tensile stress they can support before breaking) that each of them can support in the different directions. In this case, we have a glass epoxy with 1050 MPa and a HMCF with 550 MPa in 0º direction. But what about “strong”? When you referee to strong, I think you are speaking about stiffness (defines the relationship between the applied force and the deformation that is generated). The stiffness is related with the young modulus and the HMCF, as you told, should be stiffer “stronger”. In this case, if we get the glass-fibre to the limit, we will have a tension of 1050 MPa and a deformation of 5 mm, for example. In the case of a HMCF, if we get it to the limit, we will have a tension of 550 MPa, but a much lower deformation, due to the high modulus or high stiffness, 0.1 mm for example. So, the HMCF is stiffer “stronger”. Hope this has help you. Some pictures will be okay for a better understanding, but the key is to understand the difference between the young modulus [MPa] and the ultimate strength [MPa]. A higher young modulus doesn’t necessarily mean a higher ultimate strength or vice versa.
I could explain it a bit better, sorry for that. If we apply a certain force to both materials and we achieve 550MPa in both of them, for the Glass-fibre we will have 2.6 mm of deformation and for the HMCF 0.1 mm. So, the HMCF is stiffer. But what happens if we increase the force? For the Glass-fibre, we can increase the force until 1050 MPa are reached and the deformation increase will be proportional with the tensile strength increase (supposing that we are in the lineal elastic zone), achieving 5 mm of deformation. But for the HMCF, if we increase a bit the force applied, it will brake because we have passed the ultimate strength value. As conclusion, the Glass-fibre is able to receive more strength (higher ultimate strength) but will show a higher deformation with the same strength comparing to the HMCF. Hope with the combination of the two answers help you.
ANSYS Mechanical can utilise nine industry standard failure criterion to analyse damage in composite structures. These criteria's will allow you to calculate the minimum reserve factor and give an indication of the structures safety. Be sure to watch the Analysis Demo for Composites PrepPost to see how these failure criteria can be used for your problem.
Thanks for your interest. This is quite an old video - it would likely have been created using Ansys 19.x, there have been significant changes since then and we recommend you upgrade to 2023 R1 to take advantage of the cumulative improvements to the software, especially in the area of composites modelling
Thank you for this work 🌷 But, I need help about how to make the model in ANSYS APDL program ,. I want to simulate concrete column wrapped with CFRP with ANSYS finite element ...can you please provide me with a reference or video could help. I'm looking forward to hearing from you soon.
Thank you for the information provided throughout this series. It has been of great help.
Here to help
Thanks a lot. You are such a nice tutor. Looking ahead to more tutorials.
I liked the video, I am having a problem studying an assembly where one of the pieces is made of composite material. When placing the assembly in the ACP module, when I go to the setup only the part to which I am going to apply the composite material appears (I understand that it is because I defined it as a surface previously), but when I link the ACP module to the structural static I only see links the composite part and not the entire assembly.
Very comprehensive overview over some basic principles and analysis guidelines. Thanks a lot! I am interested in more details on when to use which failure analysis method. Any advice?
10:57
Thank you so much, can you explain me how to create a composite material of FMLs 5layers ( AL, epoxy, GFRP, epoxy and AL) please
Very well explained, thanks!
We're glad it was helpful!
Thanks, you are doing a great job!!
Nice video. Thank you. One question - how would you model a metal insert within sandwich panel? I'm trying to do it but can't get around one issue:
My initial idea was to use solid modeling and assemble metal parts with solid composite parts in Static structural using contacts/bonding.
1. I created OSS that includes full face of the panel. I created top skin ply’s on that OSS
2. I created another OSS that covered full face but has a cutout region where metal insert should be placed. I created a core ply using this surface.
3. I created bottom skin ply's using first OSS (one that covers full face of the panel)
4. Now, when I try to create solid model, all is fine with top skin and core layer, but bottom skin has a hole/cutout in place where there’s no core.
Any suggestions on how can I avoid this unwanted cutout in my “overcore” ply’s?
What is the proper way to model such structures - sandwich panels with metal inserts?
Update: Figured it out - using cutout feature in Create Solid Model branch solves this issue.
Thanx for the lecture
Hi thanks for the lecture, i was wondering if i can get the cad file of the f1 car that you use
So, by the Tensile Strenght graph shown in minute 15:00, we can then claim that Carbon Fibre/Epoxy has a much lower value than Glass Fibre/Epoxy. Isn't this counter-intuitive to most tecnical documentation? As far as I know, Carbon Fibre/Epoxy is 'stronger' than Glass/Epoxy, isn't it?
I suppose that the property shown in the graph is the maximum tensile strength (the maximum tensile stress they can support before breaking) that each of them can support in the different directions. In this case, we have a glass epoxy with 1050 MPa and a HMCF with 550 MPa in 0º direction.
But what about “strong”? When you referee to strong, I think you are speaking about stiffness (defines the relationship between the applied force and the deformation that is generated). The stiffness is related with the young modulus and the HMCF, as you told, should be stiffer “stronger”.
In this case, if we get the glass-fibre to the limit, we will have a tension of 1050 MPa and a deformation of 5 mm, for example. In the case of a HMCF, if we get it to the limit, we will have a tension of 550 MPa, but a much lower deformation, due to the high modulus or high stiffness, 0.1 mm for example. So, the HMCF is stiffer “stronger”.
Hope this has help you. Some pictures will be okay for a better understanding, but the key is to understand the difference between the young modulus [MPa] and the ultimate strength [MPa]. A higher young modulus doesn’t necessarily mean a higher ultimate strength or vice versa.
I could explain it a bit better, sorry for that.
If we apply a certain force to both materials and we achieve 550MPa in both of them, for the Glass-fibre we will have 2.6 mm of deformation and for the HMCF 0.1 mm. So, the HMCF is stiffer. But what happens if we increase the force?
For the Glass-fibre, we can increase the force until 1050 MPa are reached and the deformation increase will be proportional with the tensile strength increase (supposing that we are in the lineal elastic zone), achieving 5 mm of deformation. But for the HMCF, if we increase a bit the force applied, it will brake because we have passed the ultimate strength value.
As conclusion, the Glass-fibre is able to receive more strength (higher ultimate strength) but will show a higher deformation with the same strength comparing to the HMCF.
Hope with the combination of the two answers help you.
which criteria of failure is used for composite? how can i understand whether a composite is safe or not?
ANSYS Mechanical can utilise nine industry standard failure criterion to analyse damage in composite structures.
These criteria's will allow you to calculate the minimum reserve factor and give an indication of the structures safety.
Be sure to watch the Analysis Demo for Composites PrepPost to see how these failure criteria can be used for your problem.
Hi, can you please share the ppt?
Which ansys version you are using plz reply
Thanks for your interest. This is quite an old video - it would likely have been created using Ansys 19.x, there have been significant changes since then and we recommend you upgrade to 2023 R1 to take advantage of the cumulative improvements to the software, especially in the area of composites modelling
Thank you for this work 🌷
But, I need help about how to make the model in ANSYS APDL program ,. I want to simulate concrete column wrapped with CFRP with ANSYS finite element ...can you please provide me with a reference or video could help. I'm looking forward to hearing from you soon.