AutoSave A H8 9 . C ... 3 Artificial Muscle - Datasheet 89 - Last Modified: Wed at 7:13 PM Q o Home Insert Draw Page Layout Formulas Data Review View Automate ? Tell me Comments Share Cut Calibri (Body) 12 AA 27 v ab Wrap Text General 2 AutoSum Av LG Copy Fill v Paste MVA v Conditional Format Cell Find & Format Merge & Center v $ ~ % " Insert Delete Format Sort & Analyze Sensitivity Formatting as Table Styles Clear Filter Select Data K9 * v fx A B C D E F G H J K Artificial Muscle Lab Datasheet Unspun Nylon Spring Diameter Coils in 1 cm Spring length (mm) Number of Coils 2 Table 1 Diameter (mm) (mm) 0.5 1.05 16 102.5 164 w On U Weight (g) Weight (kg) Force (N) Pre-Heat Position Post-Heat Position Change in Pre-Heat Position (m) Change in Post-Heat Position (m) (Xpre) (mm (Xpost) (mm) (AX = Xpre,n - Xpre,300 (AX = Xpost,n - Xpost,300) 300 0.3 2.94 250 279 0 0 Table 2 400 0.4 3.92 264 290 0.005 0.011 10 500 0.5 4.9 268 300 0.009 0.021 500 0.6 5.88 273 308 0.014 0.029 12 700 0.7 5.86 277 323 0.018 .044 13 800 0.8 7.84 281 334 0.022 0.055 14 15 Spring Diameter Coils in 1 cm Spring Length 16 Table 3 (mm) mm Number of Coils 17 1.02 17 104.89 178 18 Maximum Position Resting Position Maximum Resting Position 300g 19 Table 4 800g 800g Position 300g 20 338 330 324 300 21 What happened when you reset the weight to 300g 25 after treating the spring at 800g? Record your observations here! It increases but then decreases 23 24 25 26 Figure 1. Your graph will autopopulate here! 28 Effect of Applied Force on the Change in Spring Length 29 30 9.0 Artificial Muscle Lab Datasheet + Ready Ex Accessibility: Investigate 130%AutoSave A H8 9 . C ... 3 Artificial Muscle - Datasheet 89 - Last Modified: Wed at 7:13 PM Q o Home Insert Draw Page Layout Formulas Data Review View Automate ? Tell me Comments Share Cut Calibri (Body) 11 AA 27 v 29 Wrap Text General 2 AutoSum Av LG Copy Fill Paste Format BIUV MV Av Merge & Center v $ ~ % " Conditional Format Cell Insert Delete Format Sort & Find & Clear Analyze Sensitivity Formatting as Table Styles Filter Select Data 157 * v fx A B C D E F G H K 21 What happened when you reset the weight to 300g 22 after treating the spring at 800g? Record your observations here! ut then decre 23 26 Figure 1. Your graph will autopopulate here! Effect of Applied Force on the Change in Spring Length 9.0 8.0 y = 89.247x + 3.0101 7.0 Before Heating 6.0 5.0 y = 222.38x + 2.8697. After Heating 4.0 ........ Applied ........ Linear (Before Heating) 3.0 2.0 ........ Linear (After Heating) 1.0 2.0 .000 0.010 0.020 0.030 0.040 0.050 0.060 Change in Position (m) 48 G before heating = 5.41E+09 49 G after heating = 2.16E+09 50 56 57 Artificial Muscle Lab Datasheet + Ready Ex Accessibility: Investigate 130%AutoSave A A ? CGE ... Artificial Muscle - Worksheet - Saved to my Mac Q Home Insert Draw Design Layout References Mailings Review View ? Tell me Comments Editing Share Calibri (Bo... 12 A Aa v viva=v aBbCcDdEe AaBbCcDdEe aBbCcDdEe AaBbCcD AaBbCcDdEE AaBb( AaBbCcDdEE aBbCcDdEe AaBbCcDdEe E Paste B U v ab ALA equation Normal No Spacing Heading 1 Heading 2 Title Subtitle Subtle Emph Emphasis Styles Dictate Sensitivity Editor Pane ENGR 1181 Individual Worksheet Lab 5 - Artificial Muscle Lab Name: _ 1. Effect of heat treatment on the Spring Constant (k) of nylon 6,6 springs (15pts) a) From your Force (N) vs. AX (m) plot in the Lab 5 Datasheet, write down the slope of the graph for before treatment and the slope of the graph after heat treatment. The slope before heating was 222. 38 and after heating the slope was 89.247. b) What do the slopes of your trendlines physically represent? The slopes of the treadlines physically represent the spring constants of string prior to heat treatment and after heatreatment. C) Compare the spring constants from before and after the heat treatment. Which spring constant is larger? What does the spring constant tell us about the effect of the heat treatment on the spring constant? The value for the string before it was heated is larger than after it's been heated. This was discussed in the pre - lab reading - it's because heat treatment causes expansion which as a result increases the inter nuclear distance and that increases the potential of electrons which causes the stiffness of the spring constant to be lower. 2. Effect of heat treatment on the Shear Modulus (G) of nylon 6,6 springs (10pts) a) Using the values calculated above, as well as the values of the unspun nylon and spring diameters and coil densities recorded during the lab, calculate a value of the Shear Modulus (G) for both before and after the heat treatment. b) What does this tell us about the effect of the heat treatment on the spring? A larger modulus number indicates a solid is rigid, which means a large force is required to produce deformation. A small modulus value indicates a solid is soft or more flexibile. Little Page 1 of 3 574 words X English (United States) { Accessibility: Good to go Focus3 100%