# Tag Info

Accepted

### How do I interpret the curing pressure of a composite from this data sheet?

Cure Procedure Apply vacuum of 22 inches (74 kPa) Hg minimum. Apply 85 + 15 – 0 psig (586 + 103 – 0 kPa) pressure for laminates. Apply 45 + 15 – 0 psig (310 + 103 – 0 kPa) pressure for sandwich. I ...
• 3,587

### How do I cut a crack into a polymer/plastic?

Since you used some specific words in your question, I will respond a certain way. Cracks are generated by mechanical action, and cannot be machined in. They may, in certain brittle materials, be a ...
• 241
Accepted

### How do I calculate an estimate for the properties of a composite material?

There are quite a few ways to find out the stiffness and/or strength of a composite material, with a good understanding of the materials that make up the composite material. 1. Pre-engineered ...
• 5,303

• 20.9k
1 vote

### Composite beam- increase in bending moment due to reinforced steel

The difference in stiffness is important. First let's consider the aluminum W8x40 section without any steel plates: It can be loaded until the aluminum reaches a stress of 12 ksi. Then let's ...
• 1,203
1 vote
Accepted

### What are equations related to the compaction of composite metal powders?

assuming you cannot compress more than the true density, is there a formula to determine how much force corresponds to the density achieved? I scanned through some literature and found this book ...
• 522
1 vote
Accepted

### Why is graphlite so strong in tension?

Its not about the tension in the final product. [They are claiming] tension during fabrication buys them a much higher fiber loading. See 67 vol%.. a typical "wet layup" is maybe half that. Having ...
• 979
1 vote

### How to calculate scarf ratio or lap overlap for composites?

Formulas from "The Behavior of Structures Composed of Composite Materials". Consider this source material for a much deeper understanding of composites. Does the answer depend on how the composite ...
• 5,303
1 vote

### Can we make engineering grade paper mache by improving on the paper?

Absolutely. Paper mache at it's core is an early predecessor of carbon fiber. The paper is the fiber structure and the paste (not sure of the technical term) is the equivalent to the epoxy. If you ...
• 632

Only top scored, non community-wiki answers of a minimum length are eligible