CW Blog

Kanfit coping with COVID-19 and managing growth using Composites 4.0 systems

 

As I prepare an article on digitizing composites production for our July issue, I interviewed Shachar Fine, EVP of business development, marketing & sales for Kanfit Ltd. (Nof-Hagalil, Israel), a high-growth, diversified composites manufacturer and aerospace tier supplier. CW briefly mentioned Kanfit’s use of Bluetooth sensors in our 2018 series of plant tours in Israel (see “Thriving pioneer in aerospace builds business …”). In this blog, I will explore this artificial intelligence (AI)-based system in more detail.

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There’s something uniquely American about stock car racing. In the U.S., the sport has origins tied to the distribution of bootleg whiskey, known as moonshine, during the 1920s in the Prohibition era. Bootleggers would lighten and modify their vehicles for increased speed and handling in order to evade police. Fascination with these souped-up street vehicles led drivers to begin racing them for prize money and bragging rights. The races became a popular form of entertainment, and the tradition eventually became an organized sport.

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In recent yea­­rs, there’s been increasing interest in the development and standardization of new test methods for sandwich composites, including fracture mechanics, notch sensitivity and damage tolerance tests. This recent trend for sandwich composites resembles the period of development (and later standardization) of the same test methods for polymer matrix composites (PMC) in the 1980s and 1990sIn both cases, these developments were driven by new applications for which these properties were important design considerations. In this column, we focus on a Mode I fracture mechanics test for sandwich composites that’s approaching ASTM standardization — the Single Cantilever Beam (SCB) test.

For starters, fracture mechanics test methods are used to measure a material’s resistance to growth of an existing crack. For PMCs, the Mode I fracture mechanics test method is the Double Cantilever Beam (DCB) test, standardized as ASTM D55281 in 1994. This test is used to measure the resistance to growth, or fracture toughness, for an existing delamination within a unidirectional laminate under an opening-mode (Mode I) loading.

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