Practical Composites Stress Analysis - Training and Useful References
Practical Composites Stress Analysis - Training and Useful References
(OP)
Hi Everyone, we're looking for some Practical Composites Stress Analysis Training Courses and Reference materials. Most of our stress analysts are familiar with metallic airframe analysis, and the kind of strength checks required, varying from hand analysis to FEA, as well as Damage Tolerance Evaluation. However, with the introduction of more and more composites primary structures in some of the latest commercial aircraft, it has rekindled the interest to develop practical stress analysis techniques for composites structures. By "practical", we're looking for training courses that are being taught by practising engineers and useful rules of thumbs practised by the aircraft structures community.
In addition, if anyone is aware of useful reference book on Composite Stress Analysis, similar to what we have for metallic structures, e.g Bruhn's, Flabel or Niu, your advice will be greatly appreciated by all. Thanks.
In addition, if anyone is aware of useful reference book on Composite Stress Analysis, similar to what we have for metallic structures, e.g Bruhn's, Flabel or Niu, your advice will be greatly appreciated by all. Thanks.





RE: Practical Composites Stress Analysis - Training and Useful References
RE: Practical Composites Stress Analysis - Training and Useful References
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There is also an advanced course:
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If your Engineers have gone through the sructural repair for engineers courses then they know what to expect. I have not been through any of these yet, but there are plans to send me and I'm excited to go.
-Kirby
Kirby Wilkerson
Remember, first define the problem, then solve it.
RE: Practical Composites Stress Analysis - Training and Useful References
Gay-Hao- Composite Materials: Design and Applications
RE: Practical Composites Stress Analysis - Training and Useful References
http://www.nafems.org/events/nafems/2010/el012/
RE: Practical Composites Stress Analysis - Training and Useful References
RE: Practical Composites Stress Analysis - Training and Useful References
The Boeing training is a little wishy washy. Keep in mind it's designed for airline repair engineers and light on the design side.
RE: Practical Composites Stress Analysis - Training and Useful References
My best suggestion would be Niu's composite book from a practical standpoint, though it lacks substantiation in many areas. From a mechanics standpoint, I like Jone's or Daniel and Ishai's book. You can read some additional reviews on books and popular papers on my website.
Brian
www.espcomposites.com
RE: Practical Composites Stress Analysis - Training and Useful References
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RE: Practical Composites Stress Analysis - Training and Useful References
The academic approach usually focuses on laminated plate theory and lamina based failure criterion. In practice, open holes, bolted holes, compression after impact, etc. often size structure. University courses usually does not address this, or may just touch on it.
I think the problem is that academia likes "exact" solutions and with "strict" mathematics. In reality, there is a lot of grey area when dealing with composites. That does not suit academia well since it a more "universal" approach is desired.
This is also why each major company has a different philosophy, though the underlying physics and mechanics are largely the same.
This is based on working at 3 major aerospace companies and also teaching a graduate level composites course.
Brian
www.espcomposites.com
RE: Practical Composites Stress Analysis - Training and Useful References
Gay-Hoa-Tsai
http://www
Baker
http:/
RE: Practical Composites Stress Analysis - Training and Useful References
I didn't see any significant mention of holes, joints, compression after impact, etc. Topics like stability, radius opening, stress concentrations, are also very important that are not addressed. But I will take a deeper dive and see what gems it might offer.
From viewing the contents of the Baker book, I like what I see. I will pick it up soon, thanks for mentioning it.
Touching on another point, I fail to see why more author's don't go into detail about the major differences between metallics and composites. They are treated in almost opposite fashion for static and DaDT (durability and damage tolerance). Certainly some discussion for the those making the transition would be beneficial. This is a high priority on my book development.
Brian
www.espcomposites.com
RE: Practical Composites Stress Analysis - Training and Useful References
I actually like the approach and it is very practical oriented compared to other books. It covers some important topics such as joints and damage tolerance. But it is more brief than I was hoping for. Nonetheless, it is supported more than Niu's book, which is largely just a series of snapshots from major works. Not that I am criticizing Niu, since identifying the right way to approach the problems is half the battle.
Just by glancing at it, it looks worthy of recommendation.
Brian
www.espcomposites.com
RE: Practical Composites Stress Analysis - Training and Useful References
SAE AIR 4844B Composites and Metal Bonding Glossary
SAE AIR 4938 Composite and Bonded Structure Technician/Specialist: Training Document
SAE AIR 5278 Composite and Bonded Structure Engineers: Training Document
SAE AIR 5279 Composite and Bonded Structure Inspector: Training Document
SAE AIR 5719 Teaching Points for an Awareness Class on "Critical Issues in Composite Maintenance and Repair
SAE ARP 4916 Masking and Cleaning of Epoxy and Polyester Matrix Thermosetting Composite Materials
SAE ARP 4977 Drying of Thermosetting Composite Materials
SAE ARP 4991A Core Restoration of Thermosetting Composite Components
SAE ARP 5089 Composite Repair NDT/NDI Handbook
SAE ARP 5143 Vacuum Bagging of Thermosetting Composite Repairs
SAE ARP 5144 Heat Application for Thermosetting Resin Curing
SAE ARP 5256 Mixing Resins, Adhesives and Potting Compounds
SAE ARP 5319 Impregnation of Dry Fabric and Ply Lay-Up
SAE ARP 5605 Solid Composite Laminate NDI Reference Standards
SAE ARP 5606 Composite Honeycomb NDI Reference Standards
USAF T.O. 1-1-690 GENERAL ADVANCED COMPOSITE REPAIR PROCESSES MANUAL
MIL-HDBK-17-1/-2/-3** [several]
MIL-HDBK-23 STRUCTURAL SANDWICH COMPOSITES [canceled, but some good general info]
MIL-HDBK-731 NONDESTRUCTIVE TESTING METHODS OF COMPOSITE MATERIALS - THERMOGRAPHY
MIL-HDBK-732A NONDESTRUCTIVE TESTING METHODS OF COMPOSITE MATERIALS ACOUSTIC EMISSION
MIL-HDBK-733 NONDESTRUCTIVE TESTING METHODS OF COMPOSITE MATERIALS - RADIOGRAPHY
MIL-HDBK-787 NONDESTRUCTIVE TESTING METHODS OF COMPOSITE MATERIALS-ULTRASONIC
MIL-HDBK-793 NONDESTRUCTIVE TESTING TECHNIQUES FOR STRUCTURAL COMPOSITES
MIL-HDBK-803 GLASS REINFORCED PLASTICS PREVENTIVE MAINTENANCE AND REPAIR
MIL-STD-1944 POLYMER MATRIX COMPOSITES [canceled, but some good general info]
Care and Repair of Advanced Composites, Second Edition
AUTHOR(S): William Cole ISBN: 978-0-7680-1062-6 Published: June 2005 [SAE]
Design of Durable, Repairable, and Maintainable Aircraft Composites AUTHOR(S):
ISBN: 978-0-7680-0020-7 Published: August 1997 [SAE]
Composite Materials for Aircraft Structures, Second Edition, Revised
A. A. Baker, Defence Science and Technology Organisation S. Dutton, Cooperative Ctr for Advanced Composite Structures D. Kelly, University of New South Wales ISBN-10: 1-56347-540-5 ISBN-13: 978-1-56347-540-5 [AIAA]
Regards, Wil Taylor
RE: Practical Composites Stress Analysis - Training and Useful References
With Regards to Gay-Hao-Tsai,
Chapter 6: Joining and Assembly
-discrete joints, holes, and stress concentrations.
Section 5.4.5 very briefly discusses delamination in compression after impact, damage tolerance.
Appendix 2 includes figures for buckling of orthotropic structures with the caveat that stability is not in the book's scope.
Overall, the focus of the book is more as a primer in analysis of orthotropic structures, working with laminates, and analysis of typical sandwich structures with some practical information and some leads on more advanced topics.
For someone (such as myself) who who comes from the sheet metal world, it is a very good primer as it focuses on the topics most unfamiliar in a brief and easy to understand manner.
RE: Practical Composites Stress Analysis - Training and Useful References
As far as what the OP was talking about though (Bruhn, Niu, Flabel equivalents), I just think this is quite far off. However, as a newcomer to composites, with limited options there is some value there. Probably not on my short list though. Though you say it is a primer, engineers simply must be properly introduced to these very important topics if they are going to use composites with confidence. Niu's book does at least touch on these subjects with more depth.
Also, thanks for the reminder about the needs of those making a transition. It must be gradual at first and not overcomplicated. Especially in the professional environment where engineers want solutions, not mathematics.
Everyone has their favorite books, I certainly have mine. So this is just an opinion. I really commend any author willing to spend the time to tackle such a challenging topic. I am finding just how difficult it is and it is impossible to please everyone.
Brian
www.espcomposites.com