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Condensation occurs when moisture-laden warm air strikes a cold, dry surface, such as a basement wall or window. A similar thing happens with cold water passing through copper pipes. Fortunately, minor condensation issues can be reduced substantially with a few inexpensive precautions. Difficulty: Easy.
The propagation of a ductile crack involves substantial plastic flow and ductile fracture usually gives a characteristic rough fracture surface. Fracture occurs by a process known as microvoid coalescence. First, plastic strain causes small microvoids to form in the material, most often at sites of inclusions.n ductile fracture, as plastic deformation occurs, the plastic zone work-hardens, increasing the stress and strain in this area until the specimen fractures. It is the amount of plastic work done before fracture that is the main cause of the difference in total energy absorbed between specimens.