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A Numerical Approach for Determining Peridynamic Material Parameters

FORREST BABER, BRIAN JUSTUSSON, VIPUL RANATUNGA, JOSEPH SCHAEFER, IBRAHIM GUVEN

Abstract


In previous presented work [1], the authors developed a bond-based peridynamic composite approach with explicit incorporation of fiber and matrix material regions. This explicit definition of fiber and matrix material regions enabled the capturing of anisotropic behavior, but required careful and laborious determination of peridynamic material constants. This work presents a numerical approach for use with composite models in which no calibration is necessary. The numerical approach calculates peridynamic elastic constants of a lamina with resin and fiber regions explicitly defined. The approach is then extended to incorporate nonlinear constitutive behavior by utilizing nonlinear optimization techniques. As demonstration of the capability of the approach, a Ramberg-Osgood relationship was implemented within bond-based peridynamics. Additionally, the methodology was validated through off-axis tension test simulations and using a number of different grid refinement levels.


DOI
10.12783/asc34/31274

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