Database Notes
The first section of this page shows the format for the data tables, including definitions for the abbreviations used and the units for each property. The second section of this page shows notes specific to the individual data tables, including sources and any comments about the quality of the data.
Data Format
| Fiber | Matrix | Type |
| Vf | rho | tply | Temp | Cond |
| % | g/cm^3 | mm | C | Dry |
| lb/in^3 | mil | F | Wet |
| E11 | E22 | G12 | nu12 |
| GPa | GPa | GPa | |
| Msi | Msi | Msi |
| F1t | F1c | F2t | F2c | F6 |
| MPa | MPa | MPa | MPa | MPa |
| ksi | ksi | ksi | ksi | ksi |
| a11 | a22 | b12 | b12 |
| u/C | u/C | ||
| u/F | u/F |
Submitted by: Name, e-mail, Web site
Source: Literature, vendor, etc.
Notes: 1, 2, etc.
Variables
- Vf = fiber volume fraction
- rho = laminate density
- tply = ply thickness
- E11 = longitudinal modulus
- E22 = transverse modulus
- G12 = in-plane shear modulus
- nu12 = major Poisson's ratio
- F1t = longitudinal tensile strength
- F1c = longitudinal compressive strength
- F2t = transverse tensile strength
- F2c = transverse compressive strength
- F6 = in-plane shear strength
- a11 = longitudinal CTE
- a22 = transverse CTE
- b11 = longitudinal moisture expansion coefficient
- b22 = transverse moisture expansion coefficient
Notes
1: From a table of typical properties in Daniel and Ishai, Engineering Mechanics of Composite Materials, Oxford University Press, 1994. Suitable for material selection or preliminary design.
2: These look like they are probably Kevlar 49 properties, not Kevlar 149.
3: From a table of typical properties in Tsai, Composites Design, 4th Edition, Think Composites, 1988. Suitable for material selection or preliminary design.
4: Longitudinal compressive strength should be lower than longitudinal tensile strength.
5: From NASA-TM-110286, Properties of Two Carbon Composite Materials Using LTM25 Epoxy Resin, 1996. Properties are mean values of six samples (in a few cases, fewer than six samples were available). Thickness normalized values used when available. Compressive moduli, compressive Poisson's ratios, ultimate strains, bearing strengths, and additional physical properties available in the original reference.
6: For AGATE materials, strength properties are B-Basis, and stiffness properties are mean. Longitudinal properties are normalized to ply thickness. Tested in accordance with the AGATE methodology, so the data should be considered very accurate. See the report for the full data set, the test methodology, and information about site qualification.
7: From AGATE-WP3.3-033051-096, B-Basis Design Allowables for Epoxy-Based Prepreg: Newport Graphite Unitape G150 NASS / NCT321, by J. Tomblin, J. McKnenna, Y. Ng, and K.S. Raju, July 2001.