Page 24 - eBook_Proceedings of the International Conference on Digital Manufacturing V2

Proceedings of the International Conference on Digital Manufacturing –
Volume 2

thickness, divided into 100 points along its length, and achieved
via Parison Controller, serves as the input features.

The first step includes the selection of two manufacturable
bottle, one with the maximum weight and other with the minimum
weights, in such a way that both have passed the pressure and
roadworthiness tests. The next step involves conducting FEA
simulations on the minimum weight bottle and mark its results as
benchmark data for further analysis. The third step focus on
reducing the maximum-weight bottle through two methods:

• Incorporating structural support features in the most critical
regions of cans specified through FEA results.
• Utilising the technique of parison controller programming
which enables variable wall thickness distribution along the
length of bottle. This approach allows the can profile to be
divided up to 100 points from bottom to top, with each point
corresponding to a specific parison thickness, allowing
optimised can’s thickness and defined more mass to critical
region while less in less critical areas of the can.

Thus, FEA simulations will be performed by uniformly
reducing wall thickness for the first case, while varying the bottle
thickness across 100 points for second case until an optimal
weight reduction is achieved.

Methodology for Finite Element Analysis

Experimental Testing. To investigate the hyper elastic behaviour
of pure HDPE, tensile and compression test was performed to
obtain stress-strain curve. For the purpose of compression test,
aluminium mould was prepared, and hand injection moulding
machine was utilised for moulding the tablets of HDPE into a
number of cylindrical specimens, with dimensions of 0.5 x 1.0
inches (12.7 x 24.7 mm), as mentioned in ASTM D638 (ASTM,
2015). Similarly, the same strategy was taken into consideration
by following the protocol of TYPE IV HDPE dumbbell shape
specimen preparation, as described in ASTM tensile properties
(ASTM, 2014). The INSTRON-5982 static machine was used for

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