วิ�เคราะห์ผลการทดลอง

เห์ล�กชิ้��นท�� 1

เห์ล�กชิ้��นท�� 2

เห์ล�กชิ้��นท�� 3

Load (N) Extension (mm)

Load (N) Extension (mm)

Load (N) Extension(mm)

630.570.1252

9 167.660.1274

4 238.29 0.12958

1457.30.3293

9 398.290.3339

1 485.04 0.33924

2035.70.5349

9 448.680.5396

5 556.73 0.54899

1992.70.7386

8 484.360.7451

8 586.69 0.75829

1972.90.9425

3 541.580.9509

7 623.45 0.967672011.5 1.1465 652.23 1.1564 698.28 1.177

2027 1.3506 843.27 1.362 782.08 1.38652009.1 1.5547 1157.5 1.5674 996.2 1.59562008.7 1.7586 1578.5 1.7731 1378.5 1.8051996.6 1.9626 1970.5 1.9792 1874.9 2.01421986.7 2.1665 2008.6 2.185 1954.4 2.2245

1983 2.3704 1965.6 2.3908 1979.1 2.43371986.9 2.5746 1972.3 2.5964 1967.2 2.64331974.1 2.7785 1990.9 2.8021 1977.6 2.85271974.5 2.9825 2022.2 3.0078 1964.8 3.06221959.7 3.1866 2035.6 3.2135 1973.7 3.27151967.9 3.3905 2036.8 3.4192 1989.9 3.48091972.1 3.5944 2044.2 3.6247 1984.5 3.69031978.3 3.7985 2037.8 3.8306 1986.2 3.89981986.8 4.0024 2045.7 4.0363 1999.9 4.10921978.7 4.2064 2015.6 4.242 1973.8 4.31871971.2 4.4106 1997.3 4.4476 1972.3 4.5281976.4 4.6144 2037.2 4.6531 1978.9 4.7375

1973 4.8182 2050.2 4.859 1986 4.94692013.5 5.0223 2037.3 5.0646 1977.1 5.15632028.1 5.2264 2048.6 5.2701 1990.8 5.3662036.5 5.4304 2035.8 5.4757 1992.5 5.57522041.7 5.6343 2035.3 5.6817 1978.9 5.78472047.2 5.8383 2020.5 5.8874 1975.9 5.99422049.5 6.0424 2011.9 6.093 1968 6.20352060.8 6.2464 2002.6 6.2985 1973 6.41312067.3 6.4504 2011.1 6.5043 1978.9 6.62252073.8 6.6544 2021.1 6.7098 1975.7 6.83192078.2 6.8583 2013.8 6.9156 1991.7 7.04132082.1 7.0624 2009.5 7.1214 2019.4 7.25092087.3 7.2662 2004.2 7.3269 2027.3 7.46042091.5 7.4703 2004.2 7.5327 2035.1 7.66972097.5 7.6742 1987 7.7382 2038.7 7.879

2103 7.8784 2028.6 7.944 2045.2 8.08852108.3 8.0821 2049.4 8.1497 2051.7 8.29782104.5 8.2862 2059.9 8.3554 2060.1 8.5073

2113 8.4901 2063 8.561 2064 8.71692115.9 8.6943 2068.2 8.7667 2065.3 8.9262

2117 8.8983 2072.1 8.9724 2068.4 9.13582127.3 9.1022 2074.8 9.178 2075.9 9.34522123.8 9.3061 2077.7 9.3838 2079.4 9.55452128.5 9.5102 2079.9 9.5893 2088.1 9.76392130.1 9.7141 2086.2 9.7951 2087.6 9.9735

2133 9.918 2090.4 10.001 2091.5 10.1832135.4 10.122 2092.2 10.206 2097.3 10.3922140.2 10.326 2097.3 10.412 2098.2 10.6022142.9 10.53 2100.9 10.618 2101 10.8112145.4 10.734 2104.2 10.824 2105.5 11.021

2142 10.938 2099.3 11.029 2107.6 11.232145.8 11.142 2106.1 11.235 2108.1 11.4392144.4 11.346 2105 11.44 2111.3 11.6492144.6 11.55 2109.9 11.646 2112.8 11.8582147.9 11.754 2109.1 11.852 2117.6 12.0682148.3 11.958 2114.7 12.058 2117.7 12.2772150.5 12.162 2116.7 12.263 2120.6 12.487

2150 12.366 2118.2 12.469 2123.8 12.6962155.7 12.57 2117.9 12.675 2125.9 12.9062152.6 12.774 2119.1 12.88 2127.5 13.1152154.3 12.978 2121.6 13.086 2129.6 13.3242157.9 13.182 2119.5 13.292 2129 13.5342157.5 13.386 2123.7 13.497 2127.4 13.7432155.4 13.59 2127.3 13.703 2133.3 13.9532154.6 13.794 2127.2 13.909 2134.9 14.1622155.7 13.998 2126.4 14.114 2135.6 14.3722157.7 14.202 2125.9 14.32 2136.3 14.5812156.8 14.406 2126.2 14.526 2137.8 14.792156.1 14.61 2126.6 14.731 2136.1 152158.7 14.814 2126.9 14.937 2134.9 15.2092155.2 15.018 2127.2 15.143 2134.3 15.4192156.3 15.222 2127.2 15.349 2135.3 15.6282155.7 15.426 2128.8 15.554 2136.7 15.8372155.1 15.63 2129 15.76 2137.4 16.0472159.4 15.834 2129 15.965 2137.1 16.2572159.1 16.038 2130.4 16.171 2136.3 16.4662157.2 16.242 2127.9 16.377 2134.6 16.6752157.4 16.446 2130.3 16.583 2133.5 16.8852151.7 16.65 2128.4 16.788 2134.3 17.0942150.1 16.854 2127 16.994 2132.6 17.3042149.9 17.058 2127.1 17.2 2135.6 17.5132149.7 17.262 2124.6 17.405 2133.8 17.7222149.5 17.466 2124.3 17.611 2133.9 17.932

2148.8 17.67 2125.3 17.816 2131.9 18.1412146.7 17.874 2124.1 18.022 2132 18.3512146.4 18.078 2122.5 18.228 2133.1 18.562139.3 18.282 2119.5 18.434 2128.6 18.772136.6 18.486 2117.4 18.639 2127.3 18.9792131.6 18.69 2111.6 18.845 2128.1 19.1892128.4 18.894 2104.9 19.051 2120.2 19.398

2123 19.098 2103.6 19.256 2116 19.6082111 19.302 2095.5 19.462 2111.5 19.817

2093.3 19.506 2082.9 19.668 2075.8 20.0262036.5 19.71 2028.2 19.873 1939.8 20.2361549.2 19.915 1819.2 20.08 1470 20.447

19.41 20.118

-0.7182

9 20.285 -10.028 20.655

พลาสติ�กขุ่��นชิ้��นท�� 1 พลาสติ�กขุ่��นชิ้��นท�� 2 พลาสติ�กขุ่��นชิ้��นท�� 3Load (N) Extension (mm)

Load (N) Extension (mm)

Load (N)

Extension (mm)

60.7880.1218

9 52.9880.0748

26100.3

7 0.14125

92.8150.3225

4 163.210.2282

8195.5

3 0.36087

131.050.5228

1 241.280.3816

8248.2

6 0.58058

179.470.7232

6 278.10.5349

5270.2

2 0.8003

232.320.9238

9 342.320.6882

6308.3

4 1.0202

289.72 1.1244 392.530.8415

9352.7

3 1.2399

354.23 1.325 441.610.9948

7398.9

9 1.4593

440.8 1.5253 491 1.1481448.0

9 1.6792

531.15 1.7258 553.87 1.3012517.8

1 1.8987

625.42 1.9263 620.41 1.4545602.0

8 2.1186724.23 2.1268 688.88 1.6078 686.3 2.3382

824.09 2.3272 759.83 1.761790.1

4 2.558

930.11 2.5279 833.49 1.9143896.0

8 2.7775

1035.2 2.7283 913.7 2.06751004.

1 2.9974

1140.6 2.9289 993.16 2.22081108.

2 3.217

1246 3.1293 1069.5 2.37421202.

3 3.43661348.4 3.3299 1146 2.5275 1265 3.6563

1379.1 3.5307 1222.6 2.68061302.

6 3.876

1220.8 3.7311 1300.1 2.8341269.

6 4.0959

1192.9 3.9315 1368.5 2.98721221.

5 4.3156

1182.5 4.1321 1368.5 3.14081198.

7 4.5352

1175 4.3326 1245.2 3.29391187.

1 4.7548

1169.5 4.5332 1206.9 3.44731182.

4 4.97451168.5 4.7335 1196.9 3.6005 1171 5.1942

1170.6 4.934 1190.7 3.75381172.

2 5.4141

1166.8 5.1346 1184.7 3.9071167.

8 5.6338

1168.1 5.3352 1180.2 4.06021160.

5 5.8533

1166.7 5.5357 1178.1 4.21361159.

1 6.0733

1161.7 5.7361 1175 4.36691156.

4 6.2928

1160.2 5.9365 1176.1 4.52021153.

1 6.5124

1161.4 6.137 1175.7 4.67341153.

5 6.7321

1161.9 6.3377 1174.3 4.82671151.

9 6.9519

1161.3 6.5382 1172.2 4.97991150.

7 7.1715

1159.6 6.7387 1170.1 5.13311154.

2 7.3914

1164.4 6.9392 1170.2 5.28641149.

3 7.6111

1164.2 7.1397 1167.9 5.43971147.

1 7.83071159.6 7.3402 1168.1 5.593 1147 8.0503

1159.7 7.5406 1167.5 5.74631146.

3 8.2701

1163.9 7.7412 1167.3 5.89961148.

2 8.4898

1164.6 7.9416 1164.5 6.05291146.

3 8.7096

1159.1 8.1422 1168.9 6.2061146.

5 8.9292

1162 8.3426 1169.1 6.35931141.

9 9.1488

1159.5 8.5431 1169.1 6.51261140.

1 9.3685

1163.6 8.7436 1169.1 6.66591143.

1 9.5881

1163.8 8.9441 1169.1 6.81911138.

5 9.808

1162.3 9.1446 1169.1 6.97261145.

1 10.028

1160.7 9.3451 1169.3 7.12591141.

6 10.247

1161.1 9.5456 1166.2 7.27891139.

1 10.467

1160.4 9.7461 1169.2 7.43231140.

2 10.687

1158.5 9.9466 1165 7.58571141.

8 10.907

1157 10.147 1165.1 7.73891140.

2 11.126

1162.3 10.348 1165.6 7.89211142.

2 11.346

1162.1 10.548 1166.7 8.04541142.

1 11.566

1161.9 10.749 1165.6 8.19861142.

8 11.785

1162 10.949 1167.6 8.35191139.

2 12.005

1161.7 11.15 1164.4 8.50531143.

6 12.225

1160.9 11.35 1164.2 8.65851137.

9 12.444

1161.1 11.551 1164 8.81181137.

9 12.664

1160.2 11.751 1164.4 8.96491144.

2 12.884

1163.4 11.952 1164.8 9.11851139.

9 13.103

1161.3 12.152 1165.3 9.27151139.

7 13.323

1159.5 12.353 1167.3 9.42481139.

8 13.5431158.6 12.553 1164.5 9.5781 1143 13.763

1157.9 12.754 1165.5 9.73141138.

9 13.982

1162.2 12.954 1166.2 9.88471140.

9 14.2021162.1 13.155 1164 10.038 1141 14.422

1163.5 13.355 1162 10.1911141.

4 14.6411160.2 13.556 1165 10.345 1142 14.861

1163.5 13.756 1165.2 10.4981142.

6 15.081

1164.8 13.957 1165.4 10.6511139.

2 15.3

1160.6 14.157 1165.6 10.8041138.

1 15.52

1165.6 14.358 1164 10.9571140.

7 15.74

1164.9 14.558 1162.3 11.1111138.

8 15.9591161.8 14.759 1162.9 11.264 1139. 16.179

31166 14.959 1163.5 11.417 1140 16.399

1166.4 15.16 1165 11.5711141.

7 16.619

1164 15.361 1165.5 11.7241139.

9 16.838

1165.3 15.561 1165.4 11.8771138.

6 17.058

1165 15.761 1164.6 12.0311137.

1 17.278

1164.6 15.962 1164.6 12.1841140.

4 17.497

1165 16.162 1163 12.3371139.

8 17.717

1168.5 16.363 1162.6 12.491139.

6 17.937

1167.3 16.563 1162 12.6441143.

6 18.156

1165.7 16.764 1162.4 12.7971143.

6 18.376

1166 16.964 1163.1 12.951141.

3 18.5961169.5 17.165 1162.8 13.103 1141 18.815

1168.8 17.365 1162.6 13.2571140.

5 19.035

1169.4 17.566 1162.4 13.411142.

9 19.255

1169.9 17.767 1162.5 13.5631143.

1 19.475

1170.3 17.967 1164.4 13.7171144.

9 19.694

1167.6 18.168 1162.4 13.871143.

1 19.914

1169.8 18.368 1161.5 14.0231141.

3 20.134

1164.9 18.569 1161.4 14.1761140.

5 20.353

1164.6 18.769 1161.2 14.331140.

7 20.573

1166.7 18.97 1163.2 14.4831142.

7 20.793

1165.8 19.17 1163.4 14.6361142.

8 21.013

1165 19.37 1163.4 14.791143.

1 21.232

1160.5 19.571 1162.6 14.943

-6.442

4 21.452

4.8374 19.772 17.862 15.096

-5.821

7 21.672

พลาสติ�กใสชิ้��นท�� 1 พลาสติ�กใสชิ้��นท�� 2 พลาสติ�กใสชิ้��นท�� 3

Load (N) Extension (mm)

Load (N) Extension (mm)

Load (N)

Extension (mm)

2.6419 -0.0002 7.4649

-0.0002

49.324

6 -0.00027

5.3549

-0.0001

5 8.3525

-0.0001

87.822

8 -0.0003

8.25060.0036

36 16.40.0130

0619.58

3 0.011231

40.6460.0354

47 48.820.0457

8751.72

5 0.04446

73.6640.0648

22 72.4040.0775

1677.08

3 0.076026

106.680.0941

96 92.9710.1091

396.72

6 0.10751

135.840.1235

7 114.910.1406

3119.0

5 0.13886

164.730.1529

5 135.180.1721

3141.3

7 0.17022

193.620.1823

2 150.140.2036

3161.1

8 0.20157

217.980.2116

9 165.10.2351

3178.4

5 0.23289

241.210.2410

7 177.890.2666

3193.6

3 0.26418

264.440.2704

4 190.140.2981

2207.5

8 0.29548

287.330.2998

2 202.380.3294

9221.5

2 0.32708

309.880.3289

2 214.620.3609

5228.5

8 0.35844

332.420.3582

9 227.950.3924

9238.3

4 0.3898

352.160.3876

7 241.560.4240

4248.1

1 0.42116

370.04 0.4171 255.180.4555

6256.2

8 0.45252

386.62 0.4465 268.790.4870

9264.3

6 0.48388

402.920.4758

8 282.680.5186

1272.4

4 0.51524

418.410.5052

7 296.77 0.5501280.5

3 0.54661

434.04 0.5346 310.860.5815

5288.6

1 0.57797

449.970.5639

3 324.750.6128

4296.6

9 0.60934

465.90.5932

6 338.52 0.6445304.7

8 0.64072

481.820.6225

6 352.280.6760

3312.8

6 0.67209

497.750.6519

3 366.050.7075

6320.9

4 0.70349

513.68 0.6813 376.070.7390

8329.4

4 0.73488

529.60.7106

8 389.170.7704

8340.2

6 0.76611

540.140.7400

4 402.280.8019

3351.0

8 0.79748

554.58 0.7694 415.430.8333

9 361.9 0.82885

569.010.7987

5 428.910.8648

8372.7

2 0.86022

583.450.8280

9 445.530.8963

7383.5

5 0.89159

595.940.8574

2 463.870.9278

5395.1

7 0.92296

608.120.8867

2 482.320.9593

5407.1

5 0.95434

620.30.9160

1 501.740.9909

6419.1

3 0.98571

633.60.9452

9 521.16 1.0225431.1

2 1.0171

648.020.9746

5 540.59 1.054 443 1.0485

662.45 1.004 559.92 1.0855454.8

8 1.0798

676.87 1.0334 579.03 1.117468.7

2 1.1112

691.29 1.0627 598.14 1.1485484.2

1 1.1425705.72 1.0921 617.45 1.18 499.7 1.1738

720.14 1.1214 636.98 1.2115515.1

8 1.2052

733.31 1.1508 656.52 1.2427531.4

4 1.2366

746.03 1.1802 676.05 1.2743548.8

1 1.2679

758.74 1.2096 695.3 1.3058566.1

9 1.2993

773.39 1.239 714.45 1.3373583.5

6 1.3306

788.73 1.2684 733.34 1.3689600.9

4 1.362

804.07 1.2978 751.61 1.4004618.3

2 1.3934

819.38 1.3271 769.89 1.4319635.6

9 1.4247

842.31 1.3564 788.16 1.4634653.0

7 1.4561

861.16 1.3858 808.03 1.4949670.4

4 1.4874

880 1.4152 828.82 1.5264688.5

2 1.5188

899.35 1.4444 849.61 1.5579706.6

2 1.5501919.07 1.4738 870.39 1.5894 724.7 1.5815

2

938.79 1.5032 891.18 1.6208748.1

6 1.6127

958.51 1.5325 911.97 1.6523768.4

6 1.644

978.24 1.5618 932.75 1.6838788.7

5 1.6754

997.96 1.5912 953.54 1.7153809.1

3 1.7067

1017.7 1.6205 975.49 1.7468829.5

2 1.7382

1037.4 1.6499 997.58 1.7783849.9

1 1.76961057.1 1.6793 1019.7 1.8097 870.3 1.801

1076.8 1.7086 1041.8 1.8412890.5

4 1.8324

1097.6 1.7379 1063.8 1.8728909.1

4 1.8637

1118.6 1.7672 1085.9 1.9043929.9

3 1.8951

1139.6 1.7966 1108.2 1.9358950.7

3 1.9265

1160.6 1.826 1131.3 1.9673971.5

2 1.9577

1181.6 1.8553 1154.3 1.9988992.1

5 1.9892

1202.6 1.8846 1177.3 2.03031012.

5 2.0206

1223.6 1.9139 1200.2 2.06181032.

8 2.05191244.6 1.9433 1223.2 2.0933 1054 2.0833

1265.6 1.9727 1246.1 2.12461075.

8 2.1147

1286.7 2.0021 1269.1 2.1561097.

6 2.146

1307.8 2.0314 1292 2.18751119.

4 2.1773

1328.8 2.0608 1314.9 2.2191141.

2 2.20861349.9 2.0902 1337.9 2.2505 1163 2.24

1370.5 2.1196 1360.8 2.2821184.

7 2.2713

1391.1 2.149 1383.7 2.31351206.

5 2.3027

1411.7 2.1784 1406.1 2.3451228.

3 2.334

1430.3 2.2078 1428.3 2.37681250.

5 2.3654

1448.5 2.237 1450.4 2.40821272.

8 2.3967

1068.5 2.2756 1472.6 2.43971295.

1 2.4281-

10.177 2.2981 1494.8 2.47121317.

3 2.4594

-10.054 2.3257 1517 2.5027

1339.6 2.4908

-9.9303 2.3549 1538.8 2.5342

1361.9 2.5221

-9.807 2.3842 1547 2.56571384.

2 2.5534-

9.6838 2.4136 1555.2 2.59721406.

5 2.5848-

9.5605 2.4429 1549.1 2.62871428.

7 2.6161-

9.4373 2.4722 1544.4 2.66021450.

9 2.6476-9.314 2.5016 1.5728 2.7065 1473 2.679

-9.1907 2.5308

-1.9771 2.7237

1495.2 2.7104

-9.0675 2.5601

-4.1137 2.7551

1513.5 2.7418

-8.9442 2.5895

0.43709 2.7865

1526.7 2.7732

-8.6976 2.6189

0.40417 2.8179

1531.2 2.8047

-8.2303 2.6482

0.37125 2.8493

-6.305

3 2.8498

-7.7631 2.6776

0.33833 2.8807

-6.678

9 2.8684

-7.2958 2.7069

0.30541 2.9121

-7.052

5 2.899

-6.8285 2.7363

0.27249 2.9436

-7.426

1 2.9303

-6.3612 2.7656

0.23957 2.9751

-7.799

6 2.9616

-6.5071 2.795

0.20665 3.0066

-8.173

2 2.9928-

6.7153 2.8243 3.0381 3.024

1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 96

-500

0

500

1000

1500

2000

2500

เห์ล�กชิ้��นท�� 1 เห์ล�กชิ้��นท�� 2 เห์ล�กชิ้��นท�� 3

พลาสติ�กขุ่��นชิ้��นท�� 1 พลาสติ�กขุ่��นชิ้��นท�� 2 พลาสติ�กขุ่��นชิ้��นท�� 3

พลาสติ�กใสชิ้��นท�� 1 พลาสติ�กใสชิ้��นท�� 2 พลาสติ�กใสชิ้��นท�� 3

สมบั!ติ�แรงด#งขุ่องโลห์ะและพอล�เมอรแติกติ�างก!นอย่�างไร

- โลห์ะ(เห์ล�ก)ติ'องใชิ้'แรงด#งมากกวิ�าพอล�เมอร(พลาสติ�กขุ่��นและพลาสติ�กใส) ถึ#งจะถึ#งจ�ด Yield Point และ Ultimate Tensile Strenght (ควิามติ'านทานแรงด#งส*งส�ด)

เปร�ย่บัเท�ย่บัสมบั!ติ�แรงด#งขุ่องวิ!สด�แติ�ละชิ้น�ดท��ได'จากการทดลอง

- จากการทดลองเห์ล�กม�ค�ณสมบั!ติ�ติ'านทานแรงด#งมากท��ส�ด ส!งเกติได'จากกราฟ ซึ่#�งขุ่#�นไปถึ#งประมาณ 2,000 น�วิติ!น ซึ่#�งมากกวิ�าพลาสติ�กขุ่��นและใสท��ม�ค�ณสมบั!ติ�ติ'านทานแรงด#งประมาณพ�ย่ง 1,300 น�วิติ!น และ 1,500 น�วิติ!น ติามล/าด!บั

ค�าติ�างๆท��ให์'ค/านวิณห์าในติารางบั!นท#กผลการทดลองม�ควิามส/าค!ญ สามารถึน/าไปประย่�กติใชิ้'ในการท/างาน

- เราสามารถึน/าค�าท��ได'ติ�างๆ มาเป2นติ!วิเล3อกในการเล3อกวิ!สด�ไปใชิ้'ในการท/างานติ�างๆได'ติามควิามเห์มาสมขุ่องงานท��ติ'องการเชิ้�น เห์ล�ก ม�ค�ณสมบั!ติ�ติ'านทานแรงด#งได'ส*งส�ดสามารถึน/าไปใชิ้'เป2นวิ!สด�ท/าลวิดขุ่#งสะพานได' พลาสติ�ก ม�ค�ณสมบั!ติ�ย่3ดติ!วิได'ด�จ#งเห์มาท��จะน/าไปเป2นวิ!สด� ร!บัแรงกระแทก

รวิมพลาสติ�กสองชิ้��น ท/าไมถึ#งขุ่าดไม�พร'อมก!น

- เม3�อน/าพลาสติ�กสองชิ้��น ขุ่นาดเท�าก!น,ค�ณสมบั!ติ�เห์ม3อนก!น (ชิ้น�ดเด�ย่วิก!น)มาประกบัก!นแล'วิทดสอบัแรงติ'านทานแรงด�ง อาจม�ขุ่'อผ�ดพลาดในการใส�วิ!สด� ท/าให์'วิ!สด�ท!�งสองชิ้��นร!บัแรงด#งได'ไม�เท�าก!น จ�งขุ่าดไม�พร'อมก!น

พ�ชิ้!ย่ย่�ติม พ�ชิ้!ย่ 56070502052