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Reliability and engineering mechanics

The word "failure" can mean different things to different people.  Over the past couple of years, my interactions with various groups from industry has shown me that for some people failure means catastropic fracture/buckling while for others it can mean highly localized plastic yielding.  Even for relatively simple sandwich composite structures, there is no clearly agreed upon definition of the word.

With these ambiguities in mind, we started a research program on predicting the reliability of sandwich composites.  We have found that Monte Carlo simulations remain the most efficient way of computing the effect of global geometric. material,and boundary condition variability on the failure probability of a structure.  The corollary is that the incorporation of statistical information into design processes remains computationally challenging (and expensive).  That implies that we should be looking into reduced order and simpler models of the mechanics of structures rather than add more detail.

A couple of related papers/write-ups are attached.  The paper will be password protected until it can be published in a peer-reviewed journal.

-- Biswajit


PDF icon ArxIvBanerjeeSmith1009.pdf681.49 KB
PDF icon SandwichRelPass.pdf555.44 KB


A recent paper related to our work is

"Error bounds for the reliability index in finite element reliability analysis" by L. Gallimard in IJNME.

 DOI: 10.1002/nme.313

-- Biswajit

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