The Role of Crack Formation in Chevron-Notched Four-Point Bend Specimens
From NASA's technical reports server on chevron-notched specimens
The chevron notched Chevron Notched Three-Point Bend Test Specimens by Bomasfour-point bend specimen provides a convenient method for measuring fracture resistance of very brittle materials which are difficult to precrack.
Read the full memorandum http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19950005452.pdf
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