An optimized cross-linked network model to simulate the linear elastic material response of a smart polymer

Zhang, Jinjun; Koo, Bonsung; Subramanian, Nithya; Liu, Yingtao; Chattopadhyay, Aditi

doi:10.1177/1045389x15595292

Cited by 23 publications

(16 citation statements)

References 44 publications

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“…Although biological soft tissues demonstrate viscoelastic properties [17, 28–30], previous studies have found a quasi-linear material property of urological soft tissues when the stress level is under 70% of the maximal stress value [24]. Consequently, elastic material properties were used to represent mechanical behaviors of soft tissues.…”

Section: Methodsmentioning

confidence: 99%

Pelvic floor dynamics during high-impact athletic activities: A computational modeling study

Dias

Peng

Khavari

et al. 2017

Clinical Biomechanics

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Background Stress urinary incontinence is a significant problem in young female athletes, but the pathophysiology remains unclear because of the limited knowledge of the pelvic floor support function and limited capability of currently available assessment tools. The aim of our study is to develop an advanced computer modeling tool to better understand the dynamics of the internal pelvic floor during highly transient athletic activities. Methods Apelvic model was developed based on high-resolution MRI scans of a healthy nulliparous young female. A jump-landing process was simulated using realistic boundary conditions captured from jumping experiments. Hypothesized alterations of the function of pelvic floor muscles were simulated by weakening or strengthening the levator ani muscle stiffness at different levels. Intra-abdominal pressures and corresponding deformations of pelvic floor structures were monitored at different levels of weakness or enhancement. Findings Results show that pelvic floor deformations generated during a jump-landing process differed greatly from those seen in a Valsalva maneuver which is commonly used for diagnosis in clinic. The urethral mobility was only slightly influenced by the alterations of the levator ani muscle stiffness. Implications for risk factors and treatment strategies were also discussed. Interpretation Results suggest that clinical diagnosis should make allowances for observed differences in pelvic floor deformations between a Valsalva maneuver and a jump-landing process to ensure accuracy. Urethral hypermobility may be a less contributing factor than the intrinsic sphincteric closure system to the incontinence of young female athletes.

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Section: Methodsmentioning

confidence: 99%

Pelvic floor dynamics during high-impact athletic activities: A computational modeling study

Dias

Peng

Khavari

et al. 2017

Clinical Biomechanics

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“…The joints in composite structures present a greater challenge than for homogeneous, isotopic materials since anisotropic materials do not easily accommodate stress concentrations and have intrinsic weak directions. [1][2][3][4][5] There is a higher chance of the weakest spot occurring in bonded joint. It is most common source of failure in structural laminates.…”

Section: Bonded Methodsmentioning

confidence: 99%

Modeling and Analysis of Composite Bonded Joints

Park¹,

Frey²,

Simon³

2017

AJMIE

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The bonded joints in composite structures is a challenging point in both research study and industry application.Compared with homogeneous and isotropic material, there is higher chance of stress concentration and intrinsic weak for this anisotropic structures. It is most common source of failure in structural laminates. So it is important to model and analyze the composite bonded joint to get the mechanical response and estimate the damage evolution. In this review paper, composite bonded joint are categorized based on bonded methods, materials, loading methods and failure modes. Multiple widely used adhesive bonded joint models including cohesive zone element model (CZM), interface element model, multiple point constraint model, kinking crack model, and repeating RVE model are introduced and discussed. To estimate the damage evolution in the bonded joint, a series of damage criteria have been developed including displacement based, stress based, energy based and modulus based damage criteria. Those damage criteria of bonded joint are also discussed and compared. This review work is important for the development of modeling of composite bonded joint in future.

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“…A common advantage of these composites is that certain material properties (thermal, electrical, mechanical or optical) are enhanced with minimum weight adding. [1,2,3,4,5,6]. It is of interest to investigate that how most optimized properties of the material can be reached by varying the geometry, orientation, length scale, distribution and volume fraction of the fillers.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Modeling of Percolation Behavior of Electrical Conductivity in Segregated Network Polymer Nanocomposites Using Monte Carlo Method

Gu¹

2016

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Polymer nanocomposites filled with carbon nanotubes are observed to present an onset of the insulator-to-conductor transition through previous experimental studies. In this work, numerical simulations based on Monte Carlo method are performed to investigate the percolation threshold. The conductive fillers are modeled as a three dimensional (3D) network of identical units dispersed in the polymer matrix. However, the distribution of the fibers is not uniform due to the existence of the emulsion particles. The effects of the aspect ratio and fiber length on the critical volume fraction are studied. Linearization is made to the logarithm of simulation results. The calculated critical volume fraction is used in the power-law function to predict the electrical conductivity of the polymer composites. The results from the homogeneous model (without emulsion particles) and the model containing emulsion particles are compared. The effects of the size and the geometrical variation of the emulsion particles are evaluated.

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An optimized cross-linked network model to simulate the linear elastic material response of a smart polymer

Cited by 23 publications

References 44 publications

Pelvic floor dynamics during high-impact athletic activities: A computational modeling study

Pelvic floor dynamics during high-impact athletic activities: A computational modeling study

Modeling and Analysis of Composite Bonded Joints

Three-dimensional Modeling of Percolation Behavior of Electrical Conductivity in Segregated Network Polymer Nanocomposites Using Monte Carlo Method

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