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PowerLawModeI
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``PowerLawModeI`` defines a mode-I cohesive traction–separation relation using
fracture energy and peak traction.

Overview
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Material type: ``PowerLawModeI``

Parameters
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Mandatory Parameters
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   * - Parameter
     - Description
   * - ``type``
     - Must be set to ``"PowerLawModeI"``
   * - ``Gc``
     - Fracture energy
   * - ``Tult``
     - Ultimate traction

Examples
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- Interface modeling in cohesive elements

See Also
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- :doc:`../elements/interface`