Problem 6 Define a balanced laminate and a symmetric laminate and describe the types of distortions each layup helps to eliminate. Prevents distortion due to off-axis stresses. Even with balanced and symmetric there may still be large interlaminar stresses. Problem 7 A series of 1 m lengths of carbon fiber are tested. Eqn. at top.
Carbon fibers are as electrically conductive as copper.
Suggest a possible design for a polymer composite power-lead, for a computer for instance, and briefly describe a set of tests to explore the suitability of this lead. Must be flexible, therefore use braided fibers in an elastic matrix. Resistivity is not an issue because C is as conductive as Cu. Compressive buckling, fatigue, fiber-fiber abrasion will be issues. Fibers must be well covered in size and lubricant.