Baoxiang Shan's research while affiliated with Rutgers, The State University of New Jersey and other places

Publications (11)

Conference Paper
An integrated system is built to model and simulate the dynamic response of soft tissues. The mathematical formulation employs finite element and model order reduction approaches to develop a state space model for soft tissues that allows for time-efficient numerical analysis. The stimulus device and signal processing routines are built in Matlab/S...
Article
A finite element (FE) model is employed to investigate the dynamic response of soft tissues under external excitations, particularly corresponding to the case of harmonic motion imaging. A solid 3D mixed 'u-p' element S8P0 is implemented to capture the near-incompressibility inherent in soft tissues. Two important aspects in structural modelling of...
Article
A finite element model was built to simulate the dynamic behavior of soft tissues subjected to sinusoidal excitation during harmonic motion imaging. In this study, soft tissues and tissue-like phantoms were modeled as isotropic, viscoelastic, and nearly incompressible media. A 3D incompressible mixed u-p element of eight nodes, S1P0, was developed...
Conference Paper
Research on the biomechanical behavior of soft tissues has drawn a lot of recent attention due to its application in tumor pathology, rehabilitation, surgery and biomaterial implants. In this study a finite element (FE) model is applied to represent soft tissues and phantoms with complex geometry and heterogeneous material properties. A solid 3D mi...
Article
We investigate the problem of a kinking crack at a bimaterial interface when the two surfaces are in contact near the crack tip. Using a potential function and the dislocation technique, we relate, by a singular integral equation, the stress intensity factors (SIF) at the kinking crack tip to the SIF before crack kinking. We use Gauss-Chebyshev int...
Article
Numerous experimental and computational methods have been developed to estimate tissue elasticity. The existing testing techniques are generally classified into in vitro, invasive in vivo and non-invasive in vivo. For each experimental method, a computational scheme is accordingly proposed to calculate mechanical properties of soft biological tissu...
Conference Paper
Research on the biomechanical behavior of soft tissues has drawn a lot of recent attention due to its application in tissue evaluation, early cancer detection, rehabilitation and surgery. Dynamic analysis of soft tissues not only provides histological, pathological and physiological information of the tissues, but also presents theoretical support...
Article
To investigate the effect of serrations in an interfacial crack between dissimilar materials, we introduce into the Finite Element (FE) framework a unit cell (UC) at microscale. By assigning material-specific properties to these unit cells, we can model various serration profiles and distributions and calculate their effect on the mixed-mode stress...
Conference Paper
We have developed a solid mechanics model of nearly incompressible, viscoelastic soft tissue for finite element analysis (FEA) in MATLAB 7.2. Newmark’s method was used to solve the finite element equations of motion for our model. The solution to our dynamic problem was validated with a transient dynamic analysis in ANSYS 10.0. We further demonstra...
Article
The complex fracture behavior of a cross-ply composite cantilever beam with artificially embedded delamination is investigated analytically, numerically, and experimentally. The analysis of the cantilever beam is divided into two geometric configurations: the global bending of the undelaminated cantilever and the local buckling of the delaminated p...
Article
In this paper, we provide an insight into the governing mechanism of the uni-axial compressive bucklingof a delaminated composite. We propose an approximate method to analyze the bucklingbehavior as the first step to further investigate the effect of contact zone at the ends of a delamination. The agreement of the analytical results with experiment...

Citations

... At, 2003, B. Shan et. al, [10], adapted an approximate model for investigated the behavior of buckling critical load of composite structure plates with influence of delamination. The comparison between the theoretical and experimental results showed good agreement. ...
... Considering the contact effect in our simulation, we predict the kinking angle of 80.4 • when the loading ratio of 4:1, which matches well the experimental result. We experiment with cantilever bending and microscopic three-point bending on cross-ply laminated composite (IM7/G8548) [Shan and Pelegri 2003]. Figure 5 shows images of the kinking crack in these two cases. ...
... Representative volume elements are most commonly used to model the bulk response of randomly oriented chopped fiber composites [4], bulk material response predictions of carbon nanotube-based composites [5], and fiber-reinforced fracture of polymer-matrix composites [6][7][8][9]. The ability to construct an RVE becomes ...
... The underlying mechanisms such as increase in bonding area, crack path deflection into the surrounding bulk materials and local dissipation mechanisms around asperities such as plasticity and friction as discussed in [5][6][7] are much less understood. In order to predict the effect of roughness on adhesion it is imperative to take into account these mechanisms in the analysis of the interfacial microstructure [8,9]. This paper focuses on the deflection of the crack path away from the interface (i.e., crack kinking) and more precisely on the competition between adhesive and cohesive crack propagation of an initial interface crack. ...
... 7 Advances in ultrasound elasticity imaging technique such as acoustic radiation force impulse (ARFI) and real-time shear wave elastography (SWE) have been applied in clinical practice, including the evaluation of liver fibrosis and the differential diagnosis between benign and malignant tumors in thyroid or breast. [8][9][10][11] Some research had compared the diagnostic efficacy between the 2 elastography methods. [12][13][14] They also were used in the detection of the hardness of bladder neck tissue. ...