Strut Bar Testing - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

KillerBMotorsport · 08-19-2022, 02:49 PM

Friday funday... a pic from some destructive testing of our strut braces. Deformed ends and creaking carbon fiber means as a whole these things are strong! The weak link is almost always the interface (bond) between different materials, but the high-end epoxy and design gave our 10 ton press a bit of a struggle before finally giving in.

tazio · 08-29-2022, 12:26 PM

Interesting. Are carbon strut bars a cosmetic thing? It's not a significant weight savings on a street car and the kinds of people who mod their cars wouldn't want to take grip away from the front, if there's a significant difference in stiffness.

KillerBMotorsport · 08-30-2022, 07:35 AM

Quote:

Originally Posted by tazio

Interesting. Are carbon strut bars a cosmetic thing? It's not a significant weight savings on a street car and the kinds of people who mod their cars wouldn't want to take grip away from the front, if there's a significant difference in stiffness.

They certainly do look great compared to the stamped steel units. They've grabbed attention at every event we've been to this year.

As far as stiffness goes, there's really no way to test, because you don't know on what planes or axis the chassis is moving under side loads. Although, comparing design, manufacturing process, and materials, the carbon fiber units will be far more rigid than the OEM units. One can only speculate how this would improve chassis stiffness and performance, but it certainly won't be worse than OEM

Tcoat · 08-30-2022, 07:55 AM

Quote:

Originally Posted by KillerBMotorsport

They certainly do look great compared to the stamped steel units. They've grabbed attention at every event we've been to this year.

As far as stiffness goes, there's really no way to test, because you don't know on what planes or axis the chassis is moving under side loads. Although, comparing design, manufacturing process, and materials, the carbon fiber units will be far more rigid than the OEM units. One can only speculate how this would improve chassis stiffness and performance, but it certainly won't be worse than OEM

Also be far lighter than solid steel bars and stronger than tubes.

Yoshoobaroo · 08-30-2022, 09:44 AM

What’s the laminate under the cosmetic wrap? Is it mostly unidirectional?

KillerBMotorsport · 08-30-2022, 04:12 PM

Quote:

Originally Posted by Yoshoobaroo

What’s the laminate under the cosmetic wrap? Is it mostly unidirectional?

0°/90° Twill Weave

08-19-2022, 02:49 PM	#1
KillerBMotorsport Join Date: Apr 2021 Drives: BRZ Location: Virginia Posts: 568 Thanks: 89 Thanked 710 Times in 324 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Strut Bar Testing Friday funday... a pic from some destructive testing of our strut braces. Deformed ends and creaking carbon fiber means as a whole these things are strong! The weak link is almost always the interface (bond) between different materials, but the high-end epoxy and design gave our 10 ton press a bit of a struggle before finally giving in.

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08-29-2022, 12:26 PM	#2
tazio Member Join Date: Aug 2022 Drives: Don't yet have a Toyobaru Location: USA Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Interesting. Are carbon strut bars a cosmetic thing? It's not a significant weight savings on a street car and the kinds of people who mod their cars wouldn't want to take grip away from the front, if there's a significant difference in stiffness.

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