TY - JOUR

T1 - On the constitutive modelling of fatigue damage in rubber-like materials

AU - Jha, Niraj Kumar

AU - Nackenhorst, Udo

AU - Pawar, Vaibhav S.

AU - Nadella, Rajesh

AU - Guruprasad, P. J.

N1 - Funding information: Niraj Kumar Jha is grateful to the support of the German Academic Exchange Service ( German Academic Exchange Service New Delhi ) for Thesis project of Rajesh Nadella.

PY - 2019/3/1

Y1 - 2019/3/1

N2 - A finite-strain hyperelastic phenomenological constitutive damage model is proposed to model the rate-independent failure behavior of rubber-like materials under isothermal conditions. At large strain, non-local gradient-enhanced damage model has been formulated and numerically implemented to predict the initiation and propagation of damage in rubber-like materials. The theoretical framework is based on the Internal State Variables (ISV) approach and has been implemented in the commercial finite element code ABAQUS via User Element subroutine (UEL). Robustness of the model was systematically investigated by undertaking the parametric study on the influence of damage parameters, both local and non-local, on the overall constitutive behavior of the material. The veracity of the theoretical framework was tested by quantitatively comparing the capability of the model to predict the onset of damage, its propagation and the corresponding load-displacement response of nitrile butadiene rubber material under quasi-static condition. Finally, the mesh objectivity simulations from the non-local model are presented for rubber under fatigue loading.

AB - A finite-strain hyperelastic phenomenological constitutive damage model is proposed to model the rate-independent failure behavior of rubber-like materials under isothermal conditions. At large strain, non-local gradient-enhanced damage model has been formulated and numerically implemented to predict the initiation and propagation of damage in rubber-like materials. The theoretical framework is based on the Internal State Variables (ISV) approach and has been implemented in the commercial finite element code ABAQUS via User Element subroutine (UEL). Robustness of the model was systematically investigated by undertaking the parametric study on the influence of damage parameters, both local and non-local, on the overall constitutive behavior of the material. The veracity of the theoretical framework was tested by quantitatively comparing the capability of the model to predict the onset of damage, its propagation and the corresponding load-displacement response of nitrile butadiene rubber material under quasi-static condition. Finally, the mesh objectivity simulations from the non-local model are presented for rubber under fatigue loading.

KW - Damage mechanics

KW - Experimental techniques

KW - Finite strain

KW - Hyperelasticity

KW - Non-local damage

UR - http://www.scopus.com/inward/record.url?scp=85054021557&partnerID=8YFLogxK

U2 - 10.1016/j.ijsolstr.2018.09.022

DO - 10.1016/j.ijsolstr.2018.09.022

M3 - Article

AN - SCOPUS:85054021557

VL - 159

SP - 77

EP - 89

JO - International Journal of Solids and Structures

JF - International Journal of Solids and Structures

SN - 0020-7683

ER -