Aluminum Extrusion - Specific Energy Absorption

In summary, the conversation revolved around ways to increase the specific energy absorption (SEA) of an Aluminum 1016 T6 extrusion with a length of 300mm. Suggestions included using aluminum honeycomb filler, carbon fiber composite wrapping, and creating a hole in the middle of the extrusion. Other ideas included using a thicker walled extrusion, heat treating or changing the alloy, and utilizing a sandwich panel construction with a lightweight core.
  • #1
Hey guys, doing some research here on Specific energy absorption of Aluminum 1016 T6 extrusion. 300mm length. I have to try and increase the SEA within this control volume. I have couple ideas, what do you think? I am going to apply a 150N load to the extrusion through compression and compare.

1) Using aluminum honeycomb filler. (increase in mass...)
2) Carbon Fibre composite wrapping (it will be hard to keep the outside volume in control even if the inside part is shaved off a bit)
3) elliptical or circular holy in the middle of the extrusion (splitting cutting deformation)

Any other ideas?

thanks in advance

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  • #2
ed 4) You could also try using a thicker walled extrusion, which would increase the mass of the material and thus increase the SEA. 5) You could try increasing the strength of the aluminum alloy by heat treating or changing to a different alloy. This could increase the SEA without necessarily adding more mass. 6) You could also look into using a sandwich panel construction with two thin aluminum sheets on either side of a lightweight core such as foam or honeycomb. This would give you increased stiffness and SEA without significantly increasing the weight.
  • #3

Hi Jenny,

It's great that you're researching specific energy absorption of aluminum extrusion. This is an important area of study for various industries, such as automotive and aerospace.

As for your ideas, here are some thoughts:

1) Using aluminum honeycomb filler may increase the mass of the extrusion, but it could also potentially increase the specific energy absorption. The honeycomb structure can provide additional strength and rigidity to the extrusion, allowing it to absorb more energy.

2) Carbon fiber composite wrapping could also increase the specific energy absorption, but as you mentioned, it may be difficult to control the volume and maintain the desired shape of the extrusion. It would be important to carefully design and test the wrapping to ensure it does not add too much weight or alter the extrusion's shape too much.

3) Elliptical or circular holes in the middle of the extrusion could also improve specific energy absorption by allowing for controlled deformation and splitting. However, it's important to consider the placement and size of these holes to ensure they do not weaken the overall structure of the extrusion.

Some other ideas you may want to consider are using different alloys of aluminum with higher strength and ductility, or incorporating internal reinforcements such as ribs or flanges to increase the extrusion's strength and energy absorption capabilities.

Overall, it's important to carefully evaluate and test each idea to determine which one is the most effective in increasing specific energy absorption within your control volume. Good luck with your research!

Related to Aluminum Extrusion - Specific Energy Absorption

1. What is aluminum extrusion and how is it used in specific energy absorption?

Aluminum extrusion is a process in which aluminum is forced through a die to create a specific shape or profile. This process is commonly used in the manufacturing of various products such as structural components, frames, and heat sinks. In terms of specific energy absorption, aluminum extrusion is used to create lightweight and strong structures that can absorb and dissipate impact energy, making it a popular choice in industries such as automotive, aerospace, and sports equipment.

2. How does the specific energy absorption of aluminum compare to other materials?

Aluminum has a high specific energy absorption, meaning it can absorb a significant amount of energy per unit of mass before reaching its ultimate strength. This makes it a more efficient material for absorbing impact energy compared to other metals such as steel or iron. However, some composite materials may have even higher specific energy absorption properties.

3. What factors affect the specific energy absorption of aluminum extrusions?

The specific energy absorption of aluminum extrusions can be affected by various factors such as the shape and size of the extrusion, the alloy and temper of the aluminum, the thickness of the walls, and the design of the extrusion. Additionally, the speed and angle of impact can also have an impact on the energy absorption capabilities of aluminum extrusions.

4. Can aluminum extrusions be designed to have specific energy absorption properties?

Yes, aluminum extrusions can be designed to have specific energy absorption properties by adjusting the shape, size, and design of the extrusion. By optimizing these factors, engineers can create extrusions that are tailored to absorb a certain amount of energy based on the specific application and requirements.

5. Are there any limitations to using aluminum extrusion for specific energy absorption?

While aluminum extrusion is a versatile and efficient method for creating structures with high energy absorption capabilities, it does have its limitations. The ultimate strength of aluminum is lower than some other materials, so it may not be suitable for applications that require extreme impact resistance. Additionally, the cost and complexity of the extrusion process may also be limiting factors in certain cases.

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