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ExpE Properties Polymer Materials rev0


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Unformatted text preview: ntred (Figure 5). Lock lower hydraulic grip, remove hands from area, then lock upper hydraulic grip. Install plastic protective shroud around hydraulic grips. Figure 5 Sample installed in Hydraulic Grips ExpE Properties Polymer Materials rev0.docx 4. Automated test Run lab test program. Observe movement of the hydraulic ram. Observe deformation of dogbone sample (Figure 6). Load and displacement information will display on the monitor. Data will be recorded on the computer. Capture the images of the fractured samples. Figure 6 Undeformed sample compared to elongated samples. 5. Repeat steps 1 to 4 for all samples. 6. Equipment shutdown Remove sample from hydraulic grips. Replace safety shield. Select HSM 1 Power Low then Power Off. Shutdown Station Controls software. Shutdown Hydraulic Power Supply Report Preparation Introduction Tensile sample preparation method Experimental procedures Observations during sample preparation and testing Plot stress vs. strain curves for all samples Calculate and report (in a table format) elastic modulus, yield strength, tensile strength, and %EL Record the fracture mode and fracture surface features Discussion Compare the tensile properties of polymer to metals (Al or Steel) and discuss the differences. Compare the fracture mode and fracture surface features of ductile and brittle plastics tested under both strain rates. Discuss the effect of strain rate and the mechanisms behind this effect. ExpE Properties Polymer Materials rev0.docx List of References [1] D. A. Askeland, P.P. Phule, The Science and Engineering of Materials, 4th ed. Thomson. [2] W.D. Callister, Jr. and D.G. Rethwisch, Materials Science and Engineering – An Introduction, 8th ed. Wiley and Sons. [3] W. F. Smith, Foundations of Materials Science and Engineering, 3rd ed. McGraw Hill. ExpE Properties Polymer Materials rev0.docx Appendix I Tensile specimen dimension ExpE Properties Polymer Materials rev0.docx...
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