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The following creep data were taken on an aluminum alloy at 48 °F) and a constant stress of 0 psi). Plot the data as strain versus time, then determine the steady-state or minimum creep rate. al and instantaneous strain is not included. min) Strain Time (min) Strain 0.00 18 0.82 0.22 20 0.88 0.34 22 0.95 0.41 24 1.03 0.48 26 1.12 0.55 28 1.22 0.62 1.36 30

The following creep data were taken on an aluminum alloy at 48 °F) and a constant stress of 0 psi). Plot the data as strain versus time, then determine the steady-state or minimum creep rate. al and instantaneous strain is not included. min) Strain Time (min) Strain 0.00 18 0.82 0.22 20 0.88 0.34 22 0.95 0.41 24 1.03 0.48 26 1.12 0.55 28 1.22 0.62 1.36 30

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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**Creep Data Analysis of Aluminum Alloy** The following dataset represents creep data collected from an aluminum alloy subjected to high temperature and stress conditions. The tests were conducted at 480°C (900°F) with a constant stress of 2.75 MPa (400 psi). The table details the strain observed over time. The objective is to plot this data as strain versus time and determine the steady-state (or minimum) creep rate. Note that initial and instantaneous strain are not included in this data. | Time (min) | Strain | Time (min) | Strain | |------------|--------|------------|--------| | 0 | 0.00 | 18 | 0.82 | | 2 | 0.22 | 20 | 0.88 | | 4 | 0.34 | 22 | 0.95 | | 6 | 0.41 | 24 | 1.03 | | 8 | 0.48 | 26 | 1.12 | | 10 | 0.55 | 28 | 1.22 | | 12 | 0.62 | 30 | 1.36 | | 14 | 0.68 | 32 | 1.53 | | 16 | 0.75 | 34 | 1.77 | **Instructions:** 1. **Plotting the Data:** - Create a graph plotting ‘Time (min)’ on the x-axis and ‘Strain’ on the y-axis. - Use the tabulated data points to generate the curve. 2. **Determining Creep Rate:** - Identify the region of the curve where the strain increases linearly with time. - Calculate the slope of this linear region to determine the steady-state creep rate.
Transcribed Image Text:**Creep Data Analysis of Aluminum Alloy** The following dataset represents creep data collected from an aluminum alloy subjected to high temperature and stress conditions. The tests were conducted at 480°C (900°F) with a constant stress of 2.75 MPa (400 psi). The table details the strain observed over time. The objective is to plot this data as strain versus time and determine the steady-state (or minimum) creep rate. Note that initial and instantaneous strain are not included in this data. | Time (min) | Strain | Time (min) | Strain | |------------|--------|------------|--------| | 0 | 0.00 | 18 | 0.82 | | 2 | 0.22 | 20 | 0.88 | | 4 | 0.34 | 22 | 0.95 | | 6 | 0.41 | 24 | 1.03 | | 8 | 0.48 | 26 | 1.12 | | 10 | 0.55 | 28 | 1.22 | | 12 | 0.62 | 30 | 1.36 | | 14 | 0.68 | 32 | 1.53 | | 16 | 0.75 | 34 | 1.77 | **Instructions:** 1. **Plotting the Data:** - Create a graph plotting ‘Time (min)’ on the x-axis and ‘Strain’ on the y-axis. - Use the tabulated data points to generate the curve. 2. **Determining Creep Rate:** - Identify the region of the curve where the strain increases linearly with time. - Calculate the slope of this linear region to determine the steady-state creep rate.
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