DC White was approached by a leading Autoclave manufacturer to substantiate a frame, shown in Figure 1, which was being re purposed for a new application with a slight change in the design and an increased contents weight. The original design had already been substantiated by DC White CE a few years earlier, so the original model was resurrected and updated to match the latest drawings.

The frame was originally designed to be mounted directly to the ground, however the new design is mounted on load/weigh cells so that the client can ensure the contents are distributed evenly within the Autoclave drum. The frame was modelled using beam elements in Solidworks, as shown in Figure 2, and was analysed in two positions. The first position simulated the hydrostatic load test before the frame was installed on the load cells and the second was following installation, when it was at an angle of 15°.

DC White was approached by a leading Autoclave manufacturer to substantiate a frame, shown in Figure 1, which was being re purposed for a new application with a slight change in the design and an increased contents weight. The original design had already been substantiated by DC White CE a few years earlier, so the original model was resurrected and updated to match the latest drawings.

The frame was originally designed to be mounted directly to the ground, however the new design is mounted on load/weigh cells so that the client can ensure the contents are distributed evenly within the Autoclave drum. The frame was modelled using beam elements in Solidworks, as shown in Figure 2, and was analysed in two positions. The first position simulated the hydrostatic load test before the frame was installed on the load cells and the second was following installation, when it was at an angle of 15°.

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Figure 3 shows the results of the operating load case, when installed, and there were regions of stress above allowable around the lower foot pads. These peak stresses were an artefact of the beam element modelling and were not realistic so a break-out model of the lower foot pads was created.

The break-out model stress plot, shown in Figure 4, shows that the peak stress in this area was actually 30 MPa (compared to an allowable stress value of 236 MPa) and the frame would be suitable for the new contents weight.

Using finite element analysis, DC White CE was able to help their client re purpose a design without the need for an extensive redesign.

Figure 3 shows the results of the operating load case, when installed, and there were regions of stress above allowable around the lower foot pads. These peak stresses were an artefact of the beam element modelling and were not realistic so a break-out model of the lower foot pads was created.

The break-out model stress plot, shown in Figure 4, shows that the peak stress in this area was actually 30 MPa (compared to an allowable stress value of 236 MPa) and the frame would be suitable for the new contents weight.

Using finite element analysis, DC White CE was able to help their client re purpose a design without the need for an extensive redesign.

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