Modeling the cutting edge geometry of scalpel blades

Shetty, Pralav P.; Hatton, Ryan W; Barnett, Andrew; Homich, Andrew J.; Moore, Jason Z.

doi:10.1177/0954405414567928

Cited by 9 publications

(5 citation statements)

References 16 publications

(28 reference statements)

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“…Studies have been conducted to identify the cutting edge geometry, measure the cutting forces, determine the sharpness, and investigate soft tissue cutting mechanics. A generalized geometric model was developed by Shetty et al [164] to describe the cutting edge geometry in terms of normal rake angle (Fig. 39a) and inclination angle (Fig.…”

Section: Parameters and Tooling For Machining Soft And Hard Tissues 421 Soft Tissue Cutting Toolsmentioning

confidence: 99%

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Machining of biocompatible materials — Recent advances

et al. 2019

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Machining of biocompatible materials is facing the fundamental challenges due to the specific material properties as well as the application requirements. Firstly, this paper presents a review of various materials which the medical industry needs to machine, then comments on the advances in the understanding of their specific cutting mechanisms. Finally it reviews the machining processes that the industry employs for different applications. This highlights the specific functional requirements that need to be considered when machining biocompatible materials and the associated machines and tooling. An analysis of the scientific and engineering challenges and opportunities related to this topic are presented. Cutting, biomedical, biocompatible materialsTitanium acetabular head Titanium femoral stem Composite Bone

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Section: Parameters and Tooling For Machining Soft And Hard Tissues 421 Soft Tissue Cutting Toolsmentioning

confidence: 99%

“…Coordinate system and vectors used in geometric model to define the (a) inclination angle and (b) normal rake angles of scalpel blades[164].…”

mentioning

confidence: 99%

Machining of biocompatible materials — Recent advances

et al. 2019

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“…Some ex‐vivo tests have been performed to characterize the effect of needle insertion velocity on insertion force in the lamb heart, 11 porcine hearts 12 and turkey breast 13 . Shetty et al 14 studied the effects of cutting edge geometry on insertion force using scalpel blades and phantom gel. Frick et al 15 have explored how the tension within the tissue affected needle insertion force on sheep skin.…”

Section: Introductionmentioning

confidence: 99%

Analysis and modeling of the Z‐pin insertion in prepreg based on contact mechanism

Cheng

Fei

et al. 2021

Polymer Composites

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Z-pinning is increasingly applied to improve the fracture toughness in fiberreinforced laminated composites. Force modeling during Z-pin insertion into prepreg is crucial for the manufacturing technology of Z-pinned laminates. In this paper, the effect of lay-up sequence on the Z-pin insertion force is investigated. Experimental testing reveals that the change of ply structure can result in two main force-displacement relationships in the compression phase, namely linear growth and nonlinear growth. Through analyzing the contact mechanism, the force-displacement relationship depends highly on the contact area between Z-pin and prepreg, which is validated by insertion experiments with different conical tipped Z-pins. Two models based on different contact modes of Z-pin insertion are proposed: the analytical model for the unidirectional prepreg and the finite element model for the cross-ply prepreg. The advantage of this approach is its ability to capture the contact behavior during the insertion process, thus predicting the insertion force more accurately. The analysis results are in good agreement with experiments.

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“…Based on the needle insertion model, [15][16][17][18] we can divide the Z-pin insertion process into two phases, as shown in Figure 2:…”

Section: Introductionmentioning

confidence: 99%

A novel model of Z-pin insertion in prepreg based on fracture mechanics

Cheng

Fei

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Through-thickness reinforcement is a promising solution to the problem of delamination susceptibility in laminated composites. Modeling Z-pin–prepreg interaction is essential for accurate robotics-assisted Z-pin insertion. In this paper, a novel Z-pin insertion force model combining the classical cohesive finite element (FE) method with a dynamic analytical fracture mechanics model is proposed. The velocity-dependent cohesive elements, in which the fracture toughness is provided by the analytical model, are implemented in Z-pin insertion FE model to predict the crack initiation and propagation. Then Z-pin insertion experiments are performed on prepreg sample with metallic Z-pins at different velocities to identify the analytical model parameters and validate the simulation predictions offered by the model. Dynamics of Z-pin interaction with inhomogeneous prepreg is described and the effects of insertion velocity on prepreg contact force are studied. Results show that the force model agrees well with experiments and the fracture toughness rises with the increasing Z-pin insertion velocity.

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Modeling the cutting edge geometry of scalpel blades

Cited by 9 publications

References 16 publications

Machining of biocompatible materials — Recent advances

Machining of biocompatible materials — Recent advances

Analysis and modeling of the Z‐pin insertion in prepreg based on contact mechanism

A novel model of Z-pin insertion in prepreg based on fracture mechanics

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