Application of Weibull to strength of plastic components

[Jonathan Wilkin]

I am producing injection moulded polymer components for use in an engineering application. Samples of the components are tested to destruction at higher forces than used in-service. We have a similar component made from glass and a simple two parameter Weibull is well suited to prediction of the in-service failure rate. However has there been much usage of Weibull to model failure rates in ductile polymers? In theory the failure of a plastic component should be deterministic although the injection moulding process introduces randomness into the strength.
Thank you

[Pantelis]

I am not sure I have a specific answer but given the introduced randomness a probabilistic model (i.e. Weibull) is applicable.

[Sushant Mohan Dewal]

Hi!! Even though the failure of plastic component is deterministic in nature, it depends on the geomectry of the design also eg: no. of ribs in the lug. A weibull model should be applicable to this problem.

Does any1 have any idea of the range in which the Beta value (Weibull) of plastic parts should lie?