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A number of different methods are used to evaluate a polymer's resistance to environmental stress cracking. A common method in the polymer industry is use of the Bergen jig, which subjects the sample to variable strain during a single test. The results of this test indicate the critical strain to cracking, using only one sample. [5]
The J-integral represents a way to calculate the strain energy release rate, or work per unit fracture surface area, in a material. [1] The theoretical concept of J-integral was developed in 1967 by G. P. Cherepanov [2] and independently in 1968 by James R. Rice, [3] who showed that an energetic contour path integral (called J) was independent of the path around a crack.
The strain can be decomposed into a recoverable elastic strain (ε e) and an inelastic strain (ε p). The stress at initial yield is σ 0 . Work hardening , also known as strain hardening , is the process by which a material's load-bearing capacity (strength) increases during plastic (permanent) deformation.
Charlotte's Web was a strain developed by the Stanley brothers (Joel, Jesse, Jon, Jordan, Jared and Josh [12]) through crossbreeding a strain of marijuana with industrial hemp. [13] This process created a variety with less tetrahydrocannabinol (THC) and more cannabidiol (CBD) than typical varieties of marijuana. [ 14 ]
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Pensacola food truck Rustyc Spoon opening restaurant in November Chef Rusty Strain shows off a signature menu item on the Rustyc Spoon food truck on Wednesday, Sept. 20, 2023.
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The flowering cycle can last anywhere between seven and fifteen weeks, depending on the strain and environmental conditions. When the production of psychoactive cannabinoids is sought, female plants are grown separately from male plants to induce parthenocarpy in the female plant's fruits (popularly called "sin semilla" which is Spanish for ...