I want to change the material to fiberglass so I can have an accurate weight in my drawing. I looked through the materials and found several glass fiber materials. Which one do I use for a mailbox?
I want to change the material to fiberglass so I can have an accurate weight in my drawing. I looked through the materials and found several glass fiber materials. Which one do I use for a mailbox?
From Wikipedia...
https://en.wikipedia.org/wiki/Fiberglass
"Composition: the most common types of glass fiber used in fiberglass is E-glass, which is alumino-borosilicate glass with less than 1% w/w alkali oxides, mainly used for glass-reinforced plastics. Other types of glass used are A-glass (Alkali-lime glass with little or no boron oxide), E-CR-glass (Electrical/Chemical Resistance; alumino-lime silicate with less than 1% w/w alkali oxides, with high acid resistance), C-glass (alkali-lime glass with high boron oxide content, used for glass staple fibers and insulation), D-glass (borosilicate glass, named for its low Dielectric constant), R-glass (alumino silicate glass without MgO and CaO with high mechanical requirements as Reinforcement), and S-glass (alumino silicate glass without CaO but with high MgO content with high tensile strength)."
Based on the above information from Wikipedia, I would say that the E-Glass Fiber material would be what you would want to use.
Wikipedia - another very handy software tool! I wonder if we can put a hot link to it inside SWX?
Dennis Dohogne wrote:
Wikipedia - another very handy software tool! I wonder if we can put a hot link to it inside SWX?
right beside the youtube hot link.
Do you also not know how to change/assign a material to a part?
Your post makes it a little difficult to know exactly what you do and do not know. You open it with the question "How do I change the material to fiberglass?"...but then when you say "I want to change the material to fiberglass so I can have an accurate weight in my drawing. I looked through the materials and found several glass fiber materials. Which one do I use for a mailbox?" it somewhat looks like you know how to change the material and your actual question is which material would be correct.
So...now that you know which material would be correct...do you know how to change your part to that material?
Yeah I know how to change the material.
Eric Eubanks wrote:
I want to change the material to fiberglass so I can have an accurate weight in my drawing. I looked through the materials and found several glass fiber materials. Which one do I use for a mailbox?
I see one key parameter you list as your interest - weight.
Create a Configuration with each fiberglass material.
Evaluate the weight for each configuration.
Is there really a significant difference that is dependent on the fiberglass that you assign as material?
I haven't tried myself, but even without trying - my wager is no significant difference in weight.
When you start to apply logic to decision making - often complex problems aren't so complex after all.
The next step after evaluating for weight would be to evaluate for cost of product and ease (cost) of manufacturing. There would be UV resistance and weather durability also to be considered for a mailbox.
Man, this is one of the best statements that could be written for the under-educated.
Well, then I run into students who want to apply significance to difference in numbers out to 8 decimal places. I have to keep my slide-rule handy for that lecture.
J. Mather wrote:
Well, then I run into students who want to apply significance to difference in numbers out to 8 decimal places. I have to keep my slide-rule handy for that lecture.
I assume for the purposes of whacking them over the knuckles with it!
If it turns out you need to create your own material copied from one that already exists"
A good resource for material properties is Online Materials Information Resource - MatWeb
Hello
If you are asking which one of these you should choose for a composite fiberglass 
I'd say probably neither of these because I think these are just the fibers, not the composite.
Continuing with Wikipedia theme Fiberglass - Wikipedia the specific gravity for the Composite ranges from 1.4 to 1.99 ie the density from 1400 to 1990 km/m3
So I think you need to know the density of the composite you are using then create a material with this density or assume it to be something in between these numbers just to get a rough estimate
That is part of the design intent aspect. How do you want it to react to: temperature changes, impact, paint, ect. That is the fun part of working with composites (which I don't) you have so many different variables you can work with.