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Abstract:
The behavior of crack propagation in "natural" composite materials (eutectics) was investigated. it was shown that the conditions of failure should be described by a probablistic analysis that represents correctly the physical properties, rather that by the usual deterministic approach. it is considered that the methods is applicable for the failure analysis of "artificial" composite materials as well. the physical process is controlled by thermal activation. crack growth in a probabilistic process is controlled by the instantaneous state of the load-material-crack system and is the consequence of this. on the atomic scale it is recognized that bond breaking as well as healing occurs- the equivalent of the birth-death markovian processes of probability mathematics. the crack size distribution as a function of time is defined by the analysis: the expectation value of the probability distribution is the experimentally measurable average; the spread of the probability density function defines the failure time probability of the composite material. the probabilistic physical process leads to a significantly different, and often more dangerous, failure occurrence than what is expected from the usual deterministic analysis is concluded.
| Description: |
Journal article |
| Pages: |
11 |
| Report Date: |
86 |
| Report Number: |
D945302 |
Report Unavailable |
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