Search results
Results from the WOW.Com Content Network
The process for creating the cascade chart shown on the right begins with modeling the crack growth over a time interval, number of cycles, or number of flight hours. Based on an initial crack size, a i, the crack growth curve can vary significantly, causing the crack to reach its critical size in different lengths of time. This contributes to ...
mild steel cracks in the presence of alkali (e.g. boiler cracking and caustic stress corrosion cracking) and nitrates; copper alloys crack in ammoniacal solutions (season cracking); high-tensile steels have been known to crack in an unexpectedly brittle manner in a whole variety of aqueous environments, especially when chlorides are present.
Thicker grades of vinyl siding may, according to some, exhibit more resistance to the most common complaint about vinyl siding – its tendency to crack in very cold weather when it is struck or bumped by a hard object while others feel that a thinner product may allow more 'flex before cracking' and is a subject of debate. However, at "This ...
Typical crack pattern of the alkali-silica reaction (ASR). The gel exudations through the concrete cracks have a characteristic yellow color and a high pH. The fatty aspect of the exudations imbibing the concrete porosity along the cracks is also a distinctive feature of ASR. The alkali-silica reaction as a chemical cycle process
Electricians may be employed in the construction of new buildings or maintenance of existing electrical infrastructure, they can also install A/C and Telecommunications systems. [2] [3] Elevator mechanic installs vertical lift and transporting equipment. Fencer, a tradesperson who builds fences. Glazier, installs glass.
Where plaster has become severely damaged by ground salts there is little argument about the need to replaster. However, there is considerable debate about: The extent of replastering required; The use of hard sand:cement renders to replaster as part of a rising damp treatment; Plaster removed from a wall as part of a rising damp treatment.
To overcome these challenges, a new simpler and faster method was developed by SABIC to assess ESCR for high density polyethylene (HDPE) materials. In this method, the resistance of slow crack growth or environmental stress cracking is predicted from simple tensile measurement at a temperature of 80 °C. [ 9 ]
The leaky homes crisis is an ongoing construction and legal crisis in New Zealand concerning timber-framed homes built from 1988 to 2004 that were not fully weather-tight. . The problems often include the decay of timber framing which, in extreme cases, have made buildings structurally unsou