Engineering, 15.04.2020 23:48 ITSFreeBird
For some viscoelastic polymers that are subjected to stress relaxation tests, the stress decays with time according to where σ(t) and σ(0) represents the time-dependent and initial (i. e., time =0) stresses, respectively, and t and τ denote elapsed time and the relaxation time; τ is a time-independent constant characteristic of the material. A specimen of some viscoelastic polymer with the stress relaxation that obeys Equation 7.40, was suddenly pulled in a tension to a measured strain of 0.5; the stress necessary to maintain this constant strain was measured as a function of time. Determine Er(8) for this material if the initial stress level was 2.62 MPa (380 psi), which dropped to 1.73 MPa (251 psi) after 64 s.
Answers: 2
Engineering, 04.07.2019 18:10
Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables
Answers: 1
Engineering, 04.07.2019 18:10
Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer
Answers: 2
Engineering, 04.07.2019 19:10
With increases in magnification, which of the following occur? a. the field of view decreases. b. the ambient illumination decreases. c. the larger parts can be measured. d. the eyepiece must be raised.
Answers: 1
Engineering, 04.07.2019 19:10
What is the major difference between thermoplastics and thermosetting plastics from the polymerization structure point of view?
Answers: 2
For some viscoelastic polymers that are subjected to stress relaxation tests, the stress decays with...
Social Studies, 10.07.2019 00:30
Social Studies, 10.07.2019 00:30
History, 10.07.2019 00:30
Mathematics, 10.07.2019 00:30
English, 10.07.2019 00:30
Social Studies, 10.07.2019 00:30
Computers and Technology, 10.07.2019 00:30
History, 10.07.2019 00:30
Mathematics, 10.07.2019 00:30
Mathematics, 10.07.2019 00:30
Mathematics, 10.07.2019 00:30
Social Studies, 10.07.2019 00:30