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Modern Material Science And Engineering 4

Subject : engineering
Instructions:
  • Answer 50 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. Term that accounts for the increased stress applied to an elliptical crack whose length is much greater than its width






2. The application of stress perpendicular to a crack - wich pulls the top and bottom potions in opposite directions






3. A value used to characterized creep based on time - temperature - and material- specific constants






4. Relates the longitudinal deformation and the lateral deformation of material under stress


5. The ratio of the elastic energy to the strain at yielding - which determines how much energy will be used for deformation and how much will be translated to motion






6. A method used to determine the tensile strength - breaking strength - and the yield strength of a sample






7. The area contained under the elastic portion of a stress - strain curve - which represent how much energy the material can absorb before permanently beforming






8. The first stage of creep - during which dislocations in a material slip and move around obstacles






9. The ease with which a material deforms without breaking






10. A statistical table based on the degrees of freedom and the level of uncertainty in a set of reported sample values






11. A single blow test names after Charpy in which a notched test sample is broken by a swinging pendulum






12. Cracks - voids - and other inperfections in a material that cause highly localized increases in stress






13. The application of stresses parallel to a crack causing the top portion to be pushed forward and the bottom portion to be pulled in the opposite direction






14. The stress at the point of transition between elastic stretching and plastic deformation






15. An estimate of the transition between elastic stretching and plastic deformation for a material without a linear region stress - strain curve






16. The region on a stress - strain curve in which no permanent changes to the material occur






17. One of the many scales used to evaluate the resistance of a materials surface to penetration by a hard object under static force






18. Plastic deformation of a material under stress at elevated temperatures; occurs due to dislocations in the material






19. A curve plotting the results of testing multiple samples at different stress levels that used to to determine the fatigue life of a material at a given stress level






20. The final stage of creep - during which the rate of deformations accelerates rapidly and continues until rupture






21. The stress at which the material breaks completely during tensile testing






22. Materials that can plastically deform without breaking






23. A value used to determine if two distinct sets of examples are statistically different






24. The fracture toughness above the critical thickness in which the width of the material no longer impacts the fracture toughness






25. The square root of the variance. this value provides more knowledge about the distance from the mean a random sample is likely to be






26. The stress level below which there is a 50% probability that failure will never occur






27. A ratio of the force applied to a sample and the instantaneous length of the chain to the initial length of the chain






28. Stress values not involving the presence of stress raisers in the material






29. The amount of flexural stress a material can withstand before breaking. measured through the bend test






30. Test that approximate the impact of an environmental variable on a material over time by exposing the material to a higher level of that variable for shorter times






31. Materials that fail completely at the onset of plastic deformation. these materials have linear stress - strain curves






32. The ratio of the maximum stress to the applied stress






33. The sudden decrease in cross - sectional area of a region of a sample under a tensile load






34. A period used to force the same aging processes to occur on a sample in a shorter amount of time






35. The resistance of the surface of a material to penetration by a hard object under static force






36. The slope of the stress - strain curve in the elastic region. aka Young's Modulus and Tensile Modulus






37. A specific method of measuring the resistance of a materials surface to penetration by a hard object under a static force






38. The ratio of applied load to cross - sectional area






39. Guidelines published by the American Society for Testing and Materials that provide detailed testing procedures to ensure that tests performed in different laboratories are directly comparable






40. A method used to measure the resistance of the surface of a material to penetration by a hard object under a static force






41. The stage in which the rate that dislocations propagate equals the rate at which the dislocations are blocked - resulting in a fairly linear region on the strain - time plot






42. A property defining a materials resistance to a blow that is measured by an impact test






43. The amount of energy lost as the test sample is destroyed during an impact test






44. The transition of some metals in which a change in temperature causes them to transform between ductile and brittle behavior






45. The study of crack growth leading to material failure






46. A method used to measure the flexural strength of a sample






47. The degree of certainty in an estimate of a mean






48. Failure because of repeated stresses bellow the yield strength






49. A statistical quantity that takes into account the random error from a variety of sources and provides infromation about the spread of the data






50. Method used to determine fatigue by alternating compressive and tensile forces on the sample