## Stress-concentration factors for finite orthotropic laminates with a pin-loaded hole by John H. Crews Download PDF EPUB FB2

Stress Concentration Factors for Finite Orthotropic Laminates With a Pin-Loaded Hole Article (PDF Available) June with Reads How we measure 'reads' Stress-Concentration Factors for Finite Orthotropic Laminates With a Pin-Loaded Hole John H.

Crews, Jr., and C. Hong Larlgley Research Certter Hampton, Virgiilia I. Raju The George Washiugtou Urliversity Joiut Irlstitute for Advaucemeut of Flight Scieuces Lauglejt Research Cerlter Harrlptou, VirgiJlia National Aeronautics Stress-concentration factors for finite orthotropic laminates with a pin-loaded hole.

Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch; [Springfield, Va.: For sale by the National Technical Information Service], (OCoLC) Material Type: Orthotropy had a significant influence on the tensile stress concentration at the hole.

For example, the stress concentration factors for the infinite laminate cases ranged from tocompared with for the quasi-isotropic laminate. The finite widths and edge distances strongly influenced the tensile stress ://?R= Stresses were calculated for finite-size orthotropic laminates loaded by a frictionless steel pin in a circular hole of the same diameter.

These calculations were based on finite-element analyses for six laminates: quasi-isotropic 0 DEG/+45 DEG/90 DEGs, 0 deg, 90 deg, 0 DEG/90 DEGs, +/ DEGs, and 0 DEG/+/ DEGs.

Stress concentration factors, based on nominal bearing stress, were determined Stress-concentration factors for finite orthotropic laminates with a pin-loaded hole.

By I. Raju, C. Hong and Jr. Crews. Abstract. Stresses were calculated for finite size orthotropic laminates loaded by a frictionless steel pin in a circular hole of the same diameter.

The calculations were based on finite element analyses for six A typical FEM mesh of a plate with a center hole is given in Fig.

physical sizes of the plates are given in Table are two different plate widths and various hole-diameters to give the same d/W ratios (P1 and P2 in Table 1). Fig. 4 presents the SCFs of an isotropic plate with different d/W and under uniaxial tension.

At point-1 location, the FEM simulations for SCFs agree well Stress concentration factors for pin-loaded unreinforced holes in elastically isotropic materials. Stress-concentration factors for finite orthotropic laminates with a pin-loaded hole book Present paper results are based on the maximum value of the tangential stress on the edge of the hole (0 = ca.

6°J. pin - loaded unreinforced Table 3. › 百度文库 › 语言/资格考试. Approximate Stress-Concentration Factors Kts for a Round Bar or Tube Having a Transverse Round Hole and Loaded in Torsion Source: R.

Peterson, Stress-Concentration Factors, Wiley, New York,pp.T D a T d The maximum stress occurs on the inside of the hole, slightly below the shaft surface.

The nominal shear stress is τ0 = T Stress Concentration Factor, \(K_t\) The Stress Concentration Factor, \(K_t\), is the ratio of maximum stress at a hole, fillet, or notch, (but not a crack) to the remote stress. For our case of a hole in an infinite plate, \(K_t = 3.\) Do not confuse the Stress Concentration Factor here with the Stress Intensity Factor used in crack :// Stress-concentration factors for finite orthotropic laminates with a pin-loaded hole / By John H.

Crews, I. Raju, C. Hong, Joint Institute for Advancement of Compendiums of stress concentrations factors such as (Stress Concentration Factors, R.E. Peterson, John Wiley and Sons, Inc., ) are excellent sources of information when "common" stress raisers are encountered.

Effects of Stress Raisers The stress raising effects of a circular groove in a tensile bar are shown in Fig.Birefringent glass-epoxy and a numerical stress-separation scheme are used to compute the stresses in the vicinity of a pin-loaded hole.

The radial and circumferential stresses at the hole edge, and the net-section and shear-out stresses are :// The purpose of this paper is to develop the equations for determining stress-concentration factors for use in the analysis of loaded holes in mechanically fastened composites.

A compact analytical solution of stresses around a pin–loaded hole in orthotropic plates is obtained by using the complex stress Crews & Naik () have developed a finite element solution by inverse technique to investigate the effect of clearance on the stress distribution near the loaded hole.

Assuming a frictionless contact and rigid pin loading a quasi-isotropic laminate, it was shown that the contact angle is The effects of pin elasticity, clearance, and friction on the stresses around the hole edge in a pin-loaded orthotropic plate are studied.

Two pin stiffnesses, two clearance levels, two friction levels and two laminates, a (0/±45/90) s and a (0 2 /±45) s are studied. The cir cumferential distribution of the stresses for a variety of cases are :// An experimental and finite element investigation into the nonlinear material behaviour of pin-loaded composite laminates, MTL Report TR (), U.S.

Army Materials Technology Laboratory, Massachusetts, Scale factors (SFs) are widely used in engineering applications to describe the stress concentration factor (SCF) of a finite width isotropic plate with a circular hole and under uniaxial :// Orthotropic had a significant influence on both the magnitude and location of the maximum tensile stress concentration on the boundary of the hole.

The laminates with 0 0 plies developed the peak tensile stress near the ends of the pin-hole contact arc. But the ±45 0 laminates had peaks where ply fiber were tangent to the hole.

The finite Hong, C.S. and Crews, J.H., Jr., "Stress Concentration Factors for Finite Orthotropic Laminates with a Circular Hole and Uniaxial Loading," NASA TP (May ).

Google Scholar Lakshiminarayana, H.V., " Stress Distribution Around a Semi-Circular Edge-Notch in a Finite Size Laminated Composite Plate Under Uniaxial Tension," J.

of Composite This paper considers analytically the stress concentration in an infinite plane loaded by a circular inclusion, which is bonded to a reinforced hole in the plane.

The pulling force of the inclusion is modeled by distributed body force. The infinite plane, the reinforced ring, and the circular inclusion can be of different elastic :// /Stress-Concentration-Reduction-at-a-Reinforced.

Many authors have tried to investigate tensile or compressive stress distribution around a pin-loaded hole through experimental and/or analytical methods, using different assumptions.

De Jong [ 2 ] gives one approach to the analytical solution of stresses around a pin-loaded hole in an orthotropic :// Stress-concentration factors for?nite orthotropic laminates with a pin-loaded hole.

NASA CR Hampton: Langley Research Center; Chang FK, Scott RA, Springer GS. Failure strength of nonlinearly elastic composite laminates containing a pin loaded › 百度文库 › 互联网. The effect of the defence hole system (DHS) on the stress distribution around the bolt-hole in glass fibre reinforced polymer (GFRP) composite bolted joint has been investigated using a finite element method.

The analyses have been carried out on a double-lap composite bolted joint with various geometric parameters for two cases of without and with The classical Savin solution for the stress induced in an orthotropic plate containing an elliptical hole places no restrictions on remote rigid-body rotations.

In this paper the Savin procedure is used to obtain a solution for which remote rigid-body rotations are required to be :// /On-Displacement-Fields-in-Orthotropic-Laminates. Although the presence of high stress concentration factors, together with a hole-diameter-to-plate-thickness ratio of only two, result in some three-dimensional effects, these are relatively small The objective of this paper is to investigate the effects of geometrical parameters such as the edge distance-to-hole diameter ratio {e/d}, plate width-to-hole diameter ratio {w/d}, and the distance between two holes-to-hole diameter ratio {l/d} on stress distribution in a unidirectional composite laminate with two serial pin-loaded holes, analytically and :// The follow web pages contain engineering design calculators will determine the amount of deflection a beam of know cross section geometry will deflect under the specified load and distribution.

Please note that SOME of these calculators use the section modulus of the geometry cross section of the beam. You will need to determine the moment of inertia of the cross section and the distance from Stress concentration factors. Axially loaded lugs with clearance-fit pins.

ESDU Elastic stress concentration factors. Geometric discontinuities in rods and tubes of isotropic materials.

ESDU Three-dimensional elastic stress concentration factors. Plain or countersunk hole in a wide plate subjected to tension, bending or pin loading ?t=ser&p=ser_stru. Figure 1: Stress-concentration factors for orthotropic laminates with a circular hole and uniform stress boundary condition; L/w = 10 [5].

4 Figure 2: Effect of clamping pressure on tensile strength of filled-hole laminates. [8]. 6 Figure 3: Effect of washer size on notch strength of filled-hole laminates (constant. Rectangular Bar with Pin Holes Plane Stress Analysis Step 4.

Rectangular Bar with Pin Holes Solid Body Analysis Step 5. Add Material Around the Hole Solid Element Analysis Step 6. Bosses Added Solid Element International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promotin Derivation of the thermoelastic stress and strain concentration factors List of Contents iv 7 Stress analysis of pin-loaded joints Orthotropic plate with a hole in the centre under uniaxial tension