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The J-integral represents a way to calculate work (energy) per unit fracture surface area in a material. J1c defines the point at which large-scale plastic yielding during propagation takes place under mode one loading. This value is difficult to determine experimentally, however in 1968 Jim Rice developed the J-integral test that allows one to calculate fracture toughness (K1c) for materials in which sample sizes are too small (on the order of < 1 meter) for direct determination of K1c. Physically the J-integral is related to the area under curve of a load versus load point displacement..
Additional recommended knowledge
J-Integral and Fracture Toughness
The J-integral can be described as follows
Fracture toughness is then calculated from the following equation
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "J_integral". A list of authors is available in Wikipedia.|