Piezoresistive CMOS-compatible sensor for out-of-plane shear stress

2013 ◽  
Vol 189 ◽  
pp. 488-495 ◽  
Author(s):  
Benjamin Lemke ◽  
Marc Baumann ◽  
Pascal Gieschke ◽  
Rajashree Baskaran ◽  
Oliver Paul
Keyword(s):  
Shear Stress ◽  
Plane Shear ◽  
Out Of Plane ◽  
Cmos Compatible

Steel Sheet Shear Walls with Burring Holes for Low- to Mid-Rise Housings

2019 ◽  
Author(s):  
Yoshimichi Kawai ◽  
Shigeaki Tohnai ◽  
Shinichiro Hashimoto ◽  
Atsushi Sato ◽  
Tetsuro Ono
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Large Deformation ◽  
Deformation Behavior ◽  
Steel Sheet ◽  
Shear Walls ◽  
Shear Load ◽  
Finite Element Analyses ◽  
Plane Shear ◽  
Out Of Plane

<p>Steel sheet shear walls with cold formed edge stiffened burring holes are applied to low- to mid-rise housings in seismically active and typhoon- or hurricane-prone regions. A configuration with burrs on the inside and smooth on the outside enables the construction of omitting the machining of holes for equipments and thinner walls with simplified attachments of finishings. In-plane shear experiments and finite element analyses revealed that the walls allowed shear stress to concentrate in intervals between the burring holes. The walls maintained stable shear load and large deformation behavior, and the deformation areas were limited in the intervals and a large out-of-plane waveform in a sheet was effectively prevented owing to edge stiffened burring ribs. The design methods are developed for evaluating the shear load of the walls at story angle from zero to 1/100, using the idea of decreasing the band width of the inclined tension fields on the intervals with the effects of the thickness.</p>

Piezoresistive CMOS sensors for out-of-plane shear stress

2009 ◽  
Author(s):  
M. Baumann ◽  
B. Lemke ◽  
P. Ruther ◽  
O. Paul
Keyword(s):  
Shear Stress ◽  
Plane Shear ◽  
Cmos Sensors ◽  
Out Of Plane

Elastic-Plastic Analysis of Combined Mode II and III Crack-Tip Fields Under Small-Scale Yielding Conditions

1990 ◽  
Vol 57 (2) ◽  
pp. 259-267 ◽  
Author(s):  
J. Pan ◽  
C. F. Shih
Keyword(s):  
Shear Stress ◽  
Radial Distance ◽  
Crack Tip ◽  
Small Scale ◽  
Mode Ii ◽  
Small Scale Yielding ◽  
Plane Shear ◽  
Out Of Plane ◽  
Scale Yielding ◽  
Combined Mode

Within the context of the small-strain approach, combined mode II and III small-scale yielding solutions of a stationary crack are obtained by finite element analysis. To investigate the behavior of the near-tip fields, the normalized stresses ahead of the crack tip are plotted as functions of the normalized radial distance to the tip for several combinations of prescribed mode II and III elastic K fields. The angular variations of the normalized stresses at a fixed radial distance deep within the plastic zone are also plotted for several combinations of remote mode II and III elastic K fields. These plots show an interesting pattern: Well within the plastic zone, the in-plane stresses can be said to be slightly less singular than r-1/(n+1) while the out-of-plane shear stresses are slightly more singular than r-1/(n+1), where n is the strain-hardening exponent of the material. However, over physically relevant distances ahead of the tip and for the full range of combined mode II and III loadings, the ratio of the in-plane shear stress to the out-of-plane shear stress agrees well with the ratio estimated by linear elastic crack-tip fields.

Parameter Study of Tool-Laminate Interface through Simulation for Composite Manufacturing Using Autoclave Process

2014 ◽  
Vol 606 ◽  
pp. 113-117 ◽  
Author(s):  
Laurent Mezeix ◽  
Mohd Nazreen Mohd Nasir ◽  
Yulfian Aminanda ◽  
Ahmad Rivai ◽  
Karim Mansur Ali
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Parameter Study ◽  
Interface Properties ◽  
Spring Back ◽  
Plane Shear ◽  
Composite Manufacturing ◽  
Linear Behavior ◽  
Out Of Plane ◽  
Chart Design

Modeling the spring-back requires tool-laminate interaction to be taken into account. In this study, an interface based on orthotropic linear behavior coupled with an out-of-plane shear stress failure was proposed to simulate the tool-laminate interaction. The results from this particular model captured the out-of-plane shear stress distribution. The model allows predicting the warpage displacement in function of interface properties; shear modulus and shear stress failure which leads to the construction of Chart Design. Additionally, the influence of the number of plies was studied as well and the evolution of the maximum warpage agreed with the literature.

Effect of Residual Shear Stresses on Released Strains in Isotopic and Orthotropic Materials Measured by the Slitting Method

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
Mahmood M. Shokrieh ◽  
Saeed Akbari R.
Keyword(s):  
Shear Stress ◽  
Normal Stress ◽  
Surface Strain ◽  
Strain Gauges ◽  
Orthotropic Materials ◽  
Back Surface ◽  
Shear Stresses ◽  
Plane Shear ◽  
Slitting Method ◽  
Out Of Plane

This paper investigates the effect of shear stresses on the determination of residual stresses in isotropic and orthotropic materials by the slitting method. A great deal of research effort is focused on the estimation of the residual stress component normal to the slit face using strain data measured by strain gauges installed on the top or the back surface of the stressed specimens. However, the slitting process will also release two in-plane and out-of-plane shear stress components, which may influence the measured strains. For the two specimens of carbon/epoxy and glass/epoxy laminated composites as well as a steel specimen, the distribution of released strains on the top and the back surfaces due to the shear stresses is calculated using finite element method and compared with those due to the residual normal stress. The results show that on the back surface, the shear stresses have a very small effect on the measured strains. However, on the top surface, strains due to the residual shear stresses are significant compared with those due to the residual normal stress and cannot be ignored. A method using two top surface strain gauges in both sides of the slit is presented to separate the effects of normal and shear stresses from each other. Also, strains due to the in-plane and the out-of-plane shear stresses could be isolated from each other. If these separations could be carried out successfully, the residual shear stress can be calculated by the proposed formulation.

A transversely hyperelastic constitutive model of flexible film composite

2021 ◽  
pp. 152808372110017
Author(s):  
Zhipeng Qu ◽  
Houdi Xiao ◽  
Mingyun Lv
Keyword(s):  
Shear Stress ◽  
Constitutive Model ◽  
Strain Energy Function ◽  
Shear Stresses ◽  
Fiber Elongation ◽  
Plane Shear ◽  
Matrix Interaction ◽  
Out Of Plane ◽  
Fiber Matrix ◽  
Anisotropic Elastic

This paper presents a transversely hyperelastic constitutive model for predicting mechanical properties of flexible composites under unidirectional tension. A strain energy function which reflects the behavior of anisotropic elastic material is decomposed into three parts: matrix, fiber and fiber-matrix interaction. The fiber-matrix interaction was decomposed into in-plane shear stresses and out-of-plane shear stress, the in-plane shear stresses were related to the fiber elongation invariants, and the out-of-plane shear stress was related to the fiber elongation invariants and the matrix invariants. The fiber-matrix interaction considering shear factor was established. Based on fiber reinforced continuum mechanics, a transverse hyperelastic constitutive model including fiber, matrix and their interaction is developed. The transversely hyperelastic constitutive model is verified by the uniaxial tension tests. The constitutive model can be used to design the flexible structure of stratospheric airship.

Finite Element Analysis of Tire/Rim Interface Forces Under Braking and Cornering Loads

1992 ◽  
Vol 20 (2) ◽  
pp. 83-105 ◽  
Author(s):  
J. P. Jeusette ◽  
M. Theves
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Contact Pressure ◽  
Element Model ◽  
Shear Stresses ◽  
Detailed Knowledge ◽  
Stress Distributions ◽  
Element Analysis ◽  
Plane Shear ◽  
Normal Contact

Abstract During vehicle braking and cornering, the tire's footprint region may see high normal contact pressures and in-plane shear stresses. The corresponding resultant forces and moments are transferred to the wheel. The optimal design of the tire bead area and the wheel requires a detailed knowledge of the contact pressure and shear stress distributions at the tire/rim interface. In this study, the forces and moments obtained from the simulation of a vehicle in stationary braking/cornering conditions are applied to a quasi-static braking/cornering tire finite element model. Detailed contact pressure and shear stress distributions at the tire/rim interface are computed for heavy braking and cornering maneuvers.

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