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# Shear Centre in an Asymmetrical Section

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## Shear Centre in an Asymmetrical Section

(OP)
Hello fellow members,

I am working on the analysis of a section subjected to bending, shear and axial, torsion. The section is asymmetric about both the axes. I would like to know is there any method to calculate shear centre by hand calculations similar to the way we calculate moment of inertia? If the section is symmetric about at least one axis, it would not be a tough task. Please suggest me some references/ methodology, I would be grateful. Please find attached typical section.

### RE: Shear Centre in an Asymmetrical Section

istambul,

If one can assume the section to be thin-walled then most books on aircraft structural analysis will describe the methodology. "Aircraft Structures for Engineering Students" by by T.H.G. Megson has a good section on this.

Regards,

Andries

### RE: Shear Centre in an Asymmetrical Section

This is covered in detail in Bruhn's textbook.

STF

### RE: Shear Centre in an Asymmetrical Section

"This is covered in detail in Bruhn's textbook.", geeze, have some respect ! ... This is covered in detail in Bruhn's bible.

another day in paradise, or is paradise one day closer ?

### RE: Shear Centre in an Asymmetrical Section

I meant to ask, RB1957... If an aeronautical engineer is called to court to give expert testimony, which book should he put his hand upon?

STF

### RE: Shear Centre in an Asymmetrical Section

Hah! That's funny SparWeb!

Aeronautical engineering covers many disciplines, and practitioners of each discipline have their own technical bibles. Only believers in "structuralism" use Bruhn's testament.

### RE: Shear Centre in an Asymmetrical Section

Tbuelna, Blasphemy!
You, too, RB1957 - darn you both to heck.

... now a little more seriously...

Hello again Istambul,
While we have been kidding amongst ourselves, I would like to know if you have tackled the shear center problem.
Do you have access to a copy of Bruhn? Are you already familiar with it or are you new to it - Bruhn can be dauntingly old-fashioned.

STF

### RE: Shear Centre in an Asymmetrical Section

I guess that's a description I can use for myself ... "dauntingly old-fashioned"

another day in paradise, or is paradise one day closer ?

STF

### RE: Shear Centre in an Asymmetrical Section

(OP)
Hello Everyone,

Thanks you all for your suggestions! I could able to get hold of Bruhn and solved it. Once again thank you all!

Glad to hear it.

STF

### RE: Shear Centre in an Asymmetrical Section

"Dauntingly old fashioned" can be used to describe myself also.I often take out the bible of stress books when explanations from other structures texts only serve to confuse the issue.The man at Purdue has written a bible that will be around for many a year.It should be required reading for all Aero students,if carefully read it answers most all questions,mistakes,yeah there are afew,but that simply keeps the reader on his toes.

### RE: Shear Centre in an Asymmetrical Section

#### Quote:

that simply keeps the reader on his toes

Oh, is that what Bruhn was doing! I thought it was just a case of the worst editor, ever.

STF

### RE: Shear Centre in an Asymmetrical Section

There is also a method described in Roark's 6th edition table 14.2 for calculating the flexural center of this type of section, for any of the Bruhn heretics out there.

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