Tape or fabric
Tape puts every fibre one way (M56 UD134: 141 GPa along); a woven fabric puts them both ways, so along the warp it is roughly half as stiff (193PW: 66 GPa), and its plies are thicker (0.214 and 0.292 mm against 0.134).
Predict · at 0:49 in the video
A woven ply has half its fibres each way. Along the warp, how stiff is it compared with the tape: about the same, about half, or about a tenth?
About half. The plain weave tests at 66 gigapascals along the warp, against 141 for the tape. The datasheet quotes them at slightly different fibre volumes, so read it as roughly half, not exactly half.
This course is our own. These books go deeper.
- Basic Mechanics of Laminated Composite Plates, A. T. Nettles, NASA Reference Publication 1351, 1994
- Mechanics of Composite Materials, R. M. Jones, Taylor & Francis, 2nd ed., 1999
- Engineering Mechanics of Composite Materials, I. M. Daniel & O. Ishai, Oxford University Press, 2nd ed., 2006
- Design and Analysis of Composite Structures, C. Kassapoglou, Wiley, 2nd ed., 2013
- Composite Materials Handbook (CMH-17), Volume 3, Rev. G, CMH-17, SAE International, 2012
The course designs in AddPly, our browser app for laminate design: regions, ply stacks with live stacking-rule checks, thickness, mass and the ply book. It does not do strength, failure or draping; where a lesson covers those, the simulation is our own.
Simulations in this lesson are our own. Ply data come from the datasheet or textbook named on screen; where a number rests on an assumption, the video says so.
