<![CDATA[Plastic waste is a problem for all humans and animals because plastic is difficult to decompose by the soil, it takes a long time for plastic to decompose. Indonesia has a large population and every year it will continue to increase and the use of plastic in Indonesia will also continue to increase, especially plastic bottle waste. Plastic chopping knife is an important component for the results of shredding plastic waste, there are many types of chopping knives according to the desired chopping results. Knives must be declared strong and tough to chop plastic into powder or small granules. In order to meet the needs in accordance with the planned workings of the plastic chopping machine, a plastic chopper knife design was made using SKD 11 material with a load of 50kg, 100kg and 150kg, so research was made. inventor 2017 . The results obtained from the manual calculation of the von misses stress load of 50kg, 100kg and 150kg are 45,143.3 Mpa, 86,096.8 Mpa, 129,128.4 Mpa. The displacement obtained is 0.243 mm, 0.487 mm, 0.731 mm. The resulting safety factor is 10.41 ul, 5.46 ul, 5.32 ul. While the results of the static simulation with the same load in the inventor, the value of von misses stress is 63,928 MPa, 127,813 MPa, and 191,712 MPa. The displacement obtained is 0.1133 mm, 0.2266 mm, 0.3399 mm. the results of the simulation of the safety factor 7.5 ul, 3.6 ul, 2.5 ul. From the stresses that occur, the skd 11 material is declared safe because the value is still smaller than the yield strength, which is 470 Mpa.]]>
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