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Strain Gradient Plasticity-Based Modeling of Damage and Fracture (Hardcover, 1st ed. 2018)
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Strain Gradient Plasticity-Based Modeling of Damage and Fracture (Hardcover, 1st ed. 2018)
Series: Springer Theses
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Total price: R3,470
Discovery Miles: 34 700
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This book provides a comprehensive introduction to numerical
modeling of size effects in metal plasticity. The main classes of
strain gradient plasticity formulations are described and
efficiently implemented in the context of the finite element
method. A robust numerical framework is presented and employed to
investigate the role of strain gradients on structural integrity
assessment. The results obtained reveal the need of incorporating
the influence on geometrically necessary dislocations in the
modeling of various damage mechanisms. Large gradients of plastic
strain increase dislocation density, promoting strain hardening and
elevating crack tip stresses. This stress elevation is quantified
under both infinitesimal and finite deformation theories,
rationalizing the experimental observation of cleavage fracture in
the presence of significant plastic flow. Gradient-enhanced
modeling of crack growth resistance, hydrogen diffusion and
environmentally assisted cracking highlighted the relevance of an
appropriate characterization of the mechanical response at the
small scales involved in crack tip deformation. Particularly
promising predictions are attained in the field of hydrogen
embrittlement. The research has been conducted at the Universities
of Cambridge, Oviedo, Luxembourg, and the Technical University of
Denmark, in a collaborative effort to understand, model and
optimize the mechanical response of engineering materials.
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