Meshfree formulation for modelling of orthogonal cutting of composites

Abstract

Please cite this article as: Kahwash, F., Shyha, I., Maheri, A., Meshfree formulation for modelling of orthogonal cutting of composites, Composite Structures (2017), doi: http://dx.doi.org/10. 1016/j.compstruct.2017.01.021 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Simulations show that the meshfree model is capable of predicting cutting forces as a function of the fibre orientation. Sensitivity analysis is conducted to investigate the effect of important meshfree parameters such as the domain of influence and weight function on forces. One of the strongest advantages of the proposed model is the simple and automatic set up process, as meshing for domain discretisation is not required.

Dynamic simulation of machining composites using the explicit element-free Galerkin method

“…Maximum stress and Hashin criteria have been used before in the modelling of machining composites e.g. [33,29,25]. LaRC02 was developed by Dàvila et al [57] of NASA and named after Langley Research Centre.…”

“…Progression of failure is modelled using stiffness degradation concept whereby the stiffness of the material point is degraded selectively based on the type of failure. The stiffness degradation procedure and parameters are similar to the one used in [25]. A normalised damage matrix D is used to store the damage status of the integration points at each time step.…”

“…Constructing the meshfree domain of influence (DoI) followed the procedure proposed in [25]. Visibility criterion was used to update DoI of integration points near the chip root (non-convex boundary).…”

“…The chip formation was compared with FRP images found in literature. Recently, orthogonal cutting model using the element-free Galerkin method was proposed by Kahwash et al [25]. The model assumed steady state and compared cutting forces with published experimental and FEM models.…”

“…The former assumes the material to be one equivalent phase, while the latter models matrix and reinforcement separately with interface elements in between. Most of the single phase models assumed linear elastic constitutive material, such as [26,27,29,31,25]. However, recently, Zenia [38,39] assumed a combined elasto-plastic material with isotropic hardening.…”