2. A polymer muterial is subjected to a constant load for a set amount of time and then the load is removed. This experiment generates the stress versas time plot and the strain versus time plot shown below. Describe what is happening to the material at following locations on the strain versus time plot below: • At point A • Between point A and point B • Between point B and peint C • Between point C and peint D Briefly comment on how you would expect this strain versus time plot to change if the experiment was carried out en anather sample of the same polymer at a temperature below the polyrmer's glass transition temperature. Time, t в A D Time, t Strain, ɛ Stress, o

2. A polymer muterial is subjected to a constant load for a set amount of time and then the load is removed. This experiment generates the stress versas time plot and the strain versus time plot shown below. Describe what is happening to the material at following locations on the strain versus time plot below: • At point A • Between point A and point B • Between point B and peint C • Between point C and peint D Briefly comment on how you would expect this strain versus time plot to change if the experiment was carried out en anather sample of the same polymer at a temperature below the polyrmer's glass transition temperature. Time, t в A D Time, t Strain, ɛ Stress, o

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Stress analysis
i need the answer quickly
3. Briefly discuss the difference between the brittle and ductile materials using the given stress-strain diagram? Brittle Material Ductile Material Strain, € Stress, o
Briefly explain the (a) how and (b) why the size of elastic deformation changes as the thickness of the specimen increases when a rod-shaped specimen made of the same material is bent.
Strain gauges are used to measure small deformations within a certain gauge length. There are several types of strain gauges, but the most dominant type is the electrical strain gauge, which consists of a foil or wire bonded to a thin base of plastic or paper (Figure 1.32). An electric current is passed through the element (foil or wire). As the element is strained, its electrical resistance changes proportionally. The strain gauge is bonded via an adhesive to the surface on which the strain measurement is desired. As the surface deforms, the strain gauge also deforms and, consequently, the resistance changes. Since the amount of resistance change is very small, an ordinary ohmmeter cannot be used. Therefore, special electric circuits, such as the Wheat- stone bridge, are used to detect the change in resistance (Dally and Riley, 2005). Strain gauges are manufactured with different sizes, but the most convenient strain gauges have a gauge length of about 5 to 15 mm. Larger strain gauges…
Quick
A 20 m long steel rod is at a temperature of 20°C. The rod is heated so that temperature rises by 50°C. If rod is allowed to expand by 14 mm, what will be the stress induced in rod? Take E = 200 GPa and a = 12 × 10-6/°C. (a) 20 MPa (c) 68 MPa (b) 35 MPa (d) None of these
The state of stresses in the x and y directions at a point in a given material is shown in the figure below. If the value of the shear stress in the x-y axes Ty is 11 N/mm², find the minimum direct stress that can be found at this point in any possible direction. Round off your answer to the nearest N/mm?. If the answer is negative do insert the "-" sign. 10 N/mm2 Txy 20 N/mm2 20 N/mm2 Ixy 10 N/mm2
Please answer both
The state of stresses in the x and y directions at a point in a given material is shown in the figure below. If the value of the shear stress in the x-y axes Ty is 17N/mm2, find the maximum shear stress that can be found at this point in any possible direction. Round off your answer to the nearest N/mm2. 10 N/mm2 Txy 20 N/mm2 20 N/mm2 Txy 10 N/mm2
During a tension test, measurements for the applied load and the corresponding elongation are taken at frequent intervals. These data points are then used to: a. calculate the stress caused by the applied load at each data point. b. calculate the strain in the specimen induced by the applied load at each data point. c. plot a stress-strain diagram. d. all of the above
4. The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to O(A) Young's modulus O(B) Bulk modulus O(C) Modulus of rigidity O(D) Modulus of elasticity