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Modern Material Science And Engineering 3

Subject : engineering
Instructions:
  • Answer 37 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Resins used as matrixes in composite materials that are more expensive than polyester resin but provide improved mechanical properties and exceptional environmental resistance






2. Process of creating prepregs by dipping fibers into a resin bath and heating them sligtly to ensure that the coatin sticks






3. Material formed by blending two materials in distinct phases causing a new material with different properties from either parent






4. Most economical choice for matrix material in composite in situations where the mechanic properties of the matrix are not crucial to the application






5. Premature failure in a composite caused by inadquate bonding b/t the fiber and matrix






6. Material in a composite that protects - orients - and transfers load to the reinforcing material






7. Device capable of continuously pulling filaments from multiple different rovings without stopping the process






8. Addition of ceramic fibes to a matrix of different ceramic material to significantly increase the fracture toughness of the composite






9. Quality of bonding between the fiber and the matrix in a composite material






10. Larger number of single fiber strands wound in parallel






11. Substance added to epoxy resin to cause it to cross link the hardener becomes incorporated in the resulting polymer






12. Condition in which the fibers in a matrix offer essentially no reinforcing benefit to the matrix when a load is applied in the transverse direction causing both to experience essentially the same strain






13. Matrix material that have many voids and poor mehcanical properties but do offer a level of fire resistance






14. Composite materials produced with at least one phase that is a composite itself






15. Hard randomly oriented particles in a particulate composite that help the composite withstand compressive loads






16. Process in which hydroxy apatite becomes part of the growing bone matrix






17. Composites that are made by alternating the layering of different materials bonded to each other






18. Level of chemical resistance - but weak in compression






19. Withstand significant tensile loads in the longitudinal direction






20. Process in which bits of chopped up fibers are mixed or blown into the matrix material along with any curing agents - accelerators - diluents - fillers - or pigmnets - in order to form a simple choped fiber composite






21. Composite in which the one material forms the outer matrix and transfers any loads applied to the stronger more brittle materials






22. Aggregage particles with a diamter greater than 0.25 inches






23. Fiber bundle already impregnated with matrix material which can be converted into a composite without any additional processing






24. Polymeric matrix materials that are extremely expensive and used only in high end applications due to their ability to maintain their properties at temperatures above 250






25. Condition where the quality of bonding b/t the fiber and matrix is sufficient that both elongate at the same rate and experience the same strain






26. Composite that contain large numbers of coarse particles such as cement and gravel found in concrete.






27. Uniaxial (along the load) - randomly oriented chopped fibers - complex two- dimensional or three- dimensional woven mats






28. Ratio of length to the diameter of the fiber used in a fiber inforced composite






29. 80% there is not enough matrix material to completely surround and bond with the fiber and transfer load effectively. - typical fiber fraction is about 30-50%






30. Aggregate particles with a diameter less than 0.25 inches






31. Hardening or toughening of a polymer material through a cross linking of polymer chains






32. Process often used to create uniaxial fiber inforced composites






33. Process of converting mats or weaves into composites through using a mold in which the mat is placed and jnjected with resin at a high enough pressure to permeate and surround the woven mat






34. Process of creating more complicated shapes of fiber- inforced composites into desired shape






35. Composites that use a metal as the matrix material in place of more common polymer matrices






36. Polymeric matrix material that combines the economic advantages of polyester resins and the exceptional properties of epoxy resins






37. Ceramics - high performance polymers - metals - or carbon fibers