Orthotropic material properties of the gerbil basilar membrane

2007 ◽  
Vol 122 (5) ◽  
pp. 2969
Author(s):  
Shuangqin Liu ◽  
Robert D. White
Keyword(s):  
Material Properties ◽  
Orthotropic Material ◽  
Basilar Membrane

scholarly journals FEM modeling of multilayer Canted Cosine Theta (CCT) magnets with orthotropic material properties

Cryogenics ◽  
2020 ◽  
Vol 107 ◽  
pp. 103041
Author(s):  
R. Ortwein ◽  
J. Blocki ◽  
P. Wachal ◽  
G. Kirby ◽  
J. van Nugteren
Keyword(s):  
Material Properties ◽  
Orthotropic Material ◽  
Fem Modeling

Analysis of Buffering Properties of Honeycomb Material

2012 ◽  
Vol 482-484 ◽  
pp. 1146-1149
Author(s):  
Ming Bo Yang ◽  
Jin Bao Chen ◽  
Fei Deng ◽  
Meng Chen
Keyword(s):  
Theoretical Analysis ◽  
Material Properties ◽  
Orthotropic Material ◽  
Soil Mechanics ◽  
Material Model ◽  
Lunar Soil ◽  
Equivalent Material ◽  
User Material Model ◽  
Honeycomb Material ◽  
Equivalent Material Properties

The buffering properties of honeycomb material are analyzed in the presented work. Theoretical analysis based on energy method is first presented, the buffering process of honeycomb material can be divided into three phases, honeycomb material can be equivalent to orthotropic material and the equivalent material properties are given. Being good at soil mechanics, Abaqus can simulate lunar soil very well. Using a constitutive model for honeycomb material, which is a built-in user material model, the presented work developed a honeycomb material simulation model and verified with a practical example. Now we can analysis the entire landing buffer process in Abaqus, which is a complement to existing analysis processes.

Prediction of Mechanical States in Wound Capacitors

1991 ◽  
Vol 113 (4) ◽  
pp. 387-392 ◽  
Author(s):  
R. C. Reuter ◽  
J. J. Allen
Keyword(s):  
Material Properties ◽  
Orthotropic Material ◽  
Optimization Theory ◽  
Dielectric Materials ◽  
Material Behavior ◽  
Orthotropic Layer ◽  
The Individual ◽  
Winding Tension ◽  
Equivalent Layer ◽  
Wound Construction

The problem of determining the mechanical states inside wound capacitor rolls is addressed through the application of two dimensional, linear elasticity. Allowances are made for heterogeneous wound construction of the capacitor, orthotropic material behavior of the capacitor constitutents, and arbitrary winding tension. A key element in the formulation is the derivation of material properties for a wound, orthotropic layer which is equivalent in behavior to a stack of dissimilar piles such as are actually wound on the capacitor simultaneously during one turn of the mandrel. The dissimilar plies are necessary by virtue of the conductor and dielectric materials which must be present in a capacitor. The derivation of predictive equations is based on winding the equivalent layer on an appropriate mandrel, followed by a recovery of the individual ply responses. The capability to explicitly calculate the winding tensions which would be necessary to produce a required wound tension dependence upon capacitor radius is also developed. Numerical results for typical capacitor design and construction are presented, and justification for the application of optimization theory in capacitor development is demonstrated.

scholarly journals Inverse Calculation of Timber-CFRP Composite Beams Using Finite Element Analysis

2020 ◽  
Author(s):  
Khaled Saad ◽  
András Lengyel
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Material Properties ◽  
Orthotropic Material ◽  
Material Model ◽  
Flexural Behavior ◽  
Fiber Reinforced Polymers ◽  
Element Analysis ◽  
Linear Elastic ◽  
Timber Beams

This study focuses on the flexural behavior of timber beams externally reinforced using carbon fiber-reinforced polymers (CFRP). Linear and non-linear finite element analysis were proposed and validated by experimental tests carried out on 44 timber beams to inversely determine the material properties of the timber and the CFRP. All the beams have the same geometrical properties and were loaded under four points bending. In this paper the general commercial software ANSYS was used, and three- and two-dimensional numerical models were evaluated for their ability to describe the behavior of the solid timber beams. The linear elastic orthotropic material model was assumed for the timber beams in the linear range and the 3D nonlinear rate-independent generalized anisotropic Hill potential model was assumed to describe the nonlinear behavior of the material. As for the CFRP, a linear elastic orthotropic material model was introduced for the fibers and a linear elastic isotropic model for the epoxy resin. No mechanical model was introduced to describe the interaction between the timber and the CFRP since failure occurred in the tensile zone of the wood. Simulated and measured load-mid-span deflection responses were compared and the material properties for timber-CFRP were numerically determined.

Performance Test of Swage Anchorage According to the Insert of CFRP Tendon

2017 ◽  
Vol 730 ◽  
pp. 452-456
Author(s):  
Moon Seoung Keum ◽  
Jae Yoon Kang ◽  
Jong Sup Park ◽  
Woo Tai Jung
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Material Properties ◽  
Orthotropic Material ◽  
Performance Test ◽  
Outer Diameter ◽  
Conventional Steel ◽  
Tensile Performance ◽  
New Type ◽  
Improved Performance

Despite of the numerous advantages offered by the CFRP tendon, there are still problems to be solved. Among them, finding an effective anchoring method considering the material properties of CFRP constitutes a typically pending problem. Being an orthotropic material, the CFRP tendon presents risk of breakage under forces acting perpendicularly to the direction of the fibers. This implies that a new type of anchor should be developed for the CFRP tendon since the anchorages used for conventional steel strands cannot be readily applied. Moreover, following the growing interest given to the CFRP tendon, research is being relentlessly conducted to develop dedicated anchorages with improved performance. Accordingly, this paper presents an experimental study on the anchor performance of the swage anchorage known to be the most compact among the various types of anchor. The tests revealed that the swage anchor without insert developed about 92% of the tensile strength of the CFRP tendon whereas the swage anchor with metallic winding insert developed 100% of the tensile strength. From these results, it appears that the anchorage with outer diameter of 24 mm develops anchor performance higher than 95% of the tensile performance of the CFRP tendon and can potentially be exploited for post-tensioning.

Buckling Analysis of Pultruded Fiber Reinforced Polymer Plastic Plate: Application of Simplified Buckling Analysis

2017 ◽  
Vol 753 ◽  
pp. 103-108
Author(s):  
Jong Ho Yoo ◽  
Sun Hee Kim ◽  
Won Chang Choi ◽  
Soon Jong Yoon
Keyword(s):  
Material Properties ◽  
Orthotropic Material ◽  
Geometric Mean ◽  
Buckling Analysis ◽  
Fiber Reinforced Polymer ◽  
Analysis Method ◽  
Fiber Reinforced ◽  
Buckling Strength ◽  
Advantages And Disadvantages ◽  
Reinforced Polymer

The pultruded fiber reinforced polymer plastic (PFRP) is one of the most actively studied materials for structural member in construction industries. In this study, a buckling analysis of PFRP plate is conducted by two analysis methods. First, a buckling strength of PFRP plate is calculated by the exact orthotropic plate buckling analysis. Second, simplified buckling analysis for PFRP plate is conducted by using approximate orthotropic material properties. The approximate orthotropic material properties are geometric mean value of longitudinal and transverse material properties of original PFRP plate. As a result of buckling analysis, buckling strength of PFRP plate for each analysis method can be obtained. From the comparison between these results, advantages and disadvantages of each analysis method are discussed. In addition, it is also discussed whether the simplified buckling analysis method for PFRP plate is applicable for the design.

VLFEM Analysis of a Two-Dimensional Cochlear Model

1985 ◽  
Vol 52 (4) ◽  
pp. 743-751 ◽  
Author(s):  
C. E. Miller
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Basilar Membrane ◽  
Rate Of Change ◽  
Hybrid Technique ◽  
Two Dimensional ◽  
Arbitrary Boundary ◽  
Reflected Waves ◽  
Full Characterization ◽  
Optimal Mesh

A hybrid technique named here the Very Large Finite Element Method (VLFEM) is developed to analyze a two-dimensional model of the cochlea of the inner ear. In this method, the domain is divided into elements of constant material properties and the exact solution to the model equations obtained in each element. This involves two forms of eigenexpansion, allowing a one-dimensional instead of two-dimensional discretization. The discretization is related to the rate of change of the wavenumber of traveling waves on the elastic partition, producing an optimal mesh spacing. A full characterization of the multiple complex wavenumbers is obtained. The results of this analysis for partition (basilar membrane) amplitude and phase exactly correspond to those from previous finite difference and finite element analyses, but less computing effort is required for the same accuracy of results. Reflected waves, abrupt changes in material properties, and arbitrary boundary conditions pose no difficulties for VLFEM analysis, an advantage over the WKB (or LG) technique used previously on this problem.

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