A polymer has creep behaviour that can be represented as a power law equation: E = 0 (Jo + Jit") where J, is 0.5 GPa1, J1 is 0.45 GPa1s-0.3 and n is 0.3 (with t in seconds). A component of this material has the following applied stress history: There is no stress before t = 0 A positive (tensile) stress of 8 MPa is applied from t = 0 for 4 hours From t = 4 hours to 6 hours, the stress is compressive stress of 2 MPa The stress is then removed. What will the strain in the material be at t = 9 hours? Enter your value as a number to 4 decimal places. You have a 2% error margin with this.

A polymer has creep behaviour that can be represented as a power law equation: E = 0 (Jo + Jit") where J, is 0.5 GPa1, J1 is 0.45 GPa1s-0.3 and n is 0.3 (with t in seconds). A component of this material has the following applied stress history: There is no stress before t = 0 A positive (tensile) stress of 8 MPa is applied from t = 0 for 4 hours From t = 4 hours to 6 hours, the stress is compressive stress of 2 MPa The stress is then removed. What will the strain in the material be at t = 9 hours? Enter your value as a number to 4 decimal places. You have a 2% error margin with this.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

ASAP
There are different Mechanical models that can describe the viscoelastic characteristics of a material. Discuss two of them and write the constitutive model for each.
C1=150 C2=110
A Tensile Tests of structural steel indicate that it fails whe the axial tensile strain is 1.80x10 μ. 3 Let maximum change in length that 0.25 [in] diamoren in tension car with stand before failure Length Find Structural Steel rad it It is 24 [in] in ni sa 9102
Please answer in proper units
1- Draw the repeat (mer) unit for the following thermoplastics: PP, PA, PMMA, PTFE, SBS, POM, PEEK, PMMA, PEI and PC. 2- A stress of 2500 psi is applied to a polymer serving as a fastener in a complex assembly. At a constant strain, the stress drops to 2400 psi after 100 h. If the stress on the part must remain above 2100 psi in order for the part to function properly, determine the life of the assembly. 3- List at least 30 thermoplastic materials with name and symbol. 4- Draw the repeat (mer) unit for the following thermoplastics: Polyethylene terephthalate (PET), Amine, Bakelite, Epoxy, Phenolic (PF), Polyester, Polyurethane (PUR), and Vinyl Ester.
Rigid bar ABCD is loaded and supported. Steel [E=30,000 ksi] bars (1) and (2) are unstressed before the load P is applied. Bar (1) has a cross-sectional area of 0.625 in.2 and bar (2) has a cross-sectional area of 1.25 in. 2. After load P is applied, the strain in bar (2) is found to be 900 με. If there is a clearance of 0.05 in. in the pin connection at C, determine: (a) the stresses in bars (1) and (2).(b) the vertical deflection of point D.(c) the load P.
Examining the stress-strain curves below, select the most correct statement from the ones below: A B /C Strain o Material B has lots of crosslinks o Material B has strong bonds between the polymer chains o Material C has more crosslinks than Material A o Material A has more crosslinks than Material C Tensile Stress
This is a Important Problem, Please solve carefully Include all the steps (diagram, formula) Handwritten Solution Recommended
SECTION B- STRUCTURES-DR LARISA MALYSHEVA QB1 DIRECT STRESS Two round solid bars of different materials are connected (in parallel) and have a common tensile force, P, of 190 kN is applied,ras shown in Figure QB1. For each bar, determine the: a) b) Stress. Strain and Strain in the diameter. Use the following information. Clearly show all your derivations. The original length of each bar = 1.7m. %3D Steel Bar: 32mm Dia. Poisson's Ratio = 0.31 18mm Dia. Young's Modulus = 210 GPa %3D Steel Aluminium Bar Bar Common Connection Aluminium Bar: P = 190 kN Poisson's Ratio = 0.34 Young's Modulus = 68 GPa Fig QB1