Composite Analysis for Modulus and Strength in the Longitudinal Direction
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- Опубликовано: 8 май 2020
- This video presents a lecture on the theoretical analysis for elastic modulus and strength of a unidirectional continuous fibre composite in the longitudinal direction. You will learn about the calculations of the elastic modulus and strength of a composite if you know those properties of the fibre and the matrix and the volume fraction of the fibre. The video also explains why there is no strengthening in such a composite if the fibre volume fraction is below a critical value.
Summary:
Best reinforcement for a composite can be achieved in unidirectional continuous fibre composite.
Both, modulus and strength of an unidirectional fibre composite in the logitudinal direction can be predicted by the rule of mixture.
There is a critical fibre volume fraction below which fibres do not provide any reinforcement to the matrix.
A nice clear explanation of composite modulus and strength. Thank you.
Thanks
Useful information👍
Thank you 👍
Amazing explanation
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Useful information
Thanks👍
Thanks a lot sir
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God bless you...
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This is the best video on composite material I have seen. Does this also apply to a carbon-foam-carbon sandwich panel?
Thanks! The analysis is not developed for foam per se. However, if we can treat a foam as not homogeneous and isotropic material then yes we can use this analysis.👍
@@engineeringmaterials-tribo5142 Thank you for replying. So for composite sandwich plate buckling analysis (say the carbon layout is isotropic and foam core is also isotropic). This method can be use to find the over all young's modulus and ultimate strength?
Damn! So kuch beauty hidden inside.. A big Thank you sir for bringing this...
Just a request iam carrying my fatigue analysis with the same? Sir so much to learn from you and I have couple of queries which iam stuck into present! It's a die hard request please tell me the how can I contact you?.. I believe you can solve the queries... Thanking you
please send your questions through this comment section. Thanks.
Good video, especially the part around 15:20. But how does 15:20 explain that failure is often matrix-initiated if the matrix still has theoretically that much strain "left". Both are in isostrain condition. Is it due to local overstressing of the matrix at the point of fibre fracture?
Assumption is that the fibre is more brittle than the matrix. Thus, at the point of fibre fracture (at fracture strain of the fibre), matrix is still in the elastic range. Let me know if you have further question. 👍
Hi, if two different woods are vertically laminated together can we calculate the final wood product's elastic modulus with the rule of mixture? for example i have two different woods and i will create a 50/50 ratio a hardwood/softwood. can i add their elastic modulus together for the final product's elastic modulus?
Yes, if the bonding between the two woods is excellent. There should be no debonding during the tension.
@@engineeringmaterials-tribo5142 thank you so much for the fast reply
This critical volume fraction is needed for random alligned short fiber composites?
For example: in ppgf20, ppgf30
Yes, only then the short fibres can impart load transfer effectively.
can we do the same calculations for compression also listed of tension
Not applicable for compression. In fact, fibres will not strengthen the matrix in compression.
Very well explained, 👍 Can you please share the details of the book that you are following for these! Thank You.
Plastics Engineering by R J Crawford
Mechanical Properties of Solid Polymers by I M Ward and J Sweeney.
drive.google.com/file/d/11LTR8GDOGwYCE7fWBEV-vck6uKlRbmBd/view?usp=sharing
@@engineeringmaterials-tribo5142 Thank You 🙂
Sir inverse rule of mixture is known as tranverse direction, it is true or not?
yes, sometimes it is known as the inverse rule of mixture.
@@engineeringmaterials-tribo5142 Thanks sir