Progressive failure analysis of double notched composite laminates

... PROGRESSIVE FAILURE ANALYSIS OF DOUBLE- NOTCHED COMPOSITE LAMINATES PHAM DINH CHI (B.ENG) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF MECHANICAL ENGINEERING ... Conclusion 99 Chapter 4: Progressive failure analysis in double- notched glass/epoxy composite laminates 102 4.1 Failure analysis of double- notched [90/0]s glass/...

Ngày tải lên: 10/09/2015, 15:49

... structures usually includes failure analysis A typical progressive failure analysis involves a model for damage initiation and propagation In the first place, the stress or strain analysis is carried ... performs The tubular form is available in biaxial and triaxial architectures The triaxial braided fabric consists of inserting an axial yarn between the braided...

Ngày tải lên: 10/09/2015, 09:11

... unreinforced CPS plates This means, the hardness of multilayered reinforced CPS plates is bigger than that of multilayered unreinforced CPS plates Displacement and stress of the linear analysis of multilayered ... number of terms in the double Fourier series of the displacements Displacement of the non-linear analysis of multilayered reinforced CPS pla...

Ngày tải lên: 05/03/2014, 14:20

... Tamuz, G.A Teterc, Strength of composite materials, Riga, “Zinatie”, 1980 Nguyen Dinh Duc, Dinh Khac Minh, Bending analysis of three-phase polymer composite plates reinforced by glass fibers and ... 6282:2008 for testing and manufacturing ship made of composite polymer reinforced by glass fibbers, Transportation Publishing House, Hanoi, 2008 Tran Ich Thinh, Composite mat...

Ngày tải lên: 14/03/2014, 13:20

... Tamuz, G.A Teterc, Strength of composite materials, Riga, “Zinatie”, 1980 Nguyen Dinh Duc, Dinh Khac Minh, Bending analysis of three-phase polymer composite plates reinforced by glass fibers and ... code TCVN 6282:2008 for testing and manufacturing ship made of composite polymer reinforced by glass fibbers, Transportation Publishing House, Hanoi, 2008 Tran Ich Thinh, Comp...

Ngày tải lên: 21/07/2014, 16:21

... Experimental results 98 5 .1 Behavior of unnotched crossply laminates 98 5 .1. 1 5 .1. 2 Biaxial tension- compression strength comparison 10 0 5 .1. 3 Strain evolutions 10 1 5 .1. 4 Failure progression ... .9 1. 5 .1 1.5.2 1. 6 Digital Image Correlation Technique 10 2D Image Correlation Technique 10 Micromechanics of Failure Theory 13 1. 6 .1 Micro Stress and Macro...

Ngày tải lên: 09/09/2015, 08:18

... Design of a cruciform specimen for biaxial testing of fibre reinforced composite laminates Composites Science and Technology, 20 06 66( 7-8): p 964 -975 Welsh J S, J S Mayes, and A C Biskner, 2-D biaxial ... Journal of Composite Materials, 1991 25(5): p 5 56- 577 54 Tan S C, & Perez J, Progressive Failure of Laminated Composites with a Hole under Compressive Loading...

Ngày tải lên: 09/09/2015, 08:18

... displacement of horizontal arms of test specimen ! A ! B A 2 AC = BC2 AC2 = AB2 + AB + BC A’ A’ (A’C’ )2 = (AB−2dh )2 + (BC+dh )2 2 (A’C’) = (AB−2dh) + (BC+dh )2 (AB−2dh) θ Bθ C (AB−2dhB ) (BC+dh) ... 0.04 04 IN 0.10 0.10 0 .2 AIN 0 .2 0. 02 05 0. 02 05 - 0.03 - 0.03 0.03 04 0.03 04 -0 -0 300 OFF-AXIS BIAXIAL LOADING OF 30 - 0. 02 30 0.1 300 OFF-AXIS - 0. 02 BIAXIAL LOAD...

Ngày tải lên: 09/09/2015, 08:18

... Φopen-hole Failure stresses (MPa) (=σopen-hole/ unnotched) θ/0 σx σy Φx Φy 33 8.81 -427.81 0 .36 0.46 15 31 6.45 -4 23. 47 0.66 0.76 30 186 .38 -141 .31 1.19 0.65 ! !59 Chapter Open-hole biaxial tests ... -0.05 -0.04 -0. 03 300 OFF-AXIS BIAXIAL LOADING OF -0.02 -0.01 0.01 0.02 OPEN-HOLE CROSSPLY LAMINATES [30 /-60] 2S STRAIN Glass tabs -0.01 0.01 0.02 0. 03 OFF-AXIS BIAXIAL LOA...

Ngày tải lên: 09/09/2015, 08:18

... Number of 3D elements 57,924 Unnotched Open-hole 48,083 97,147 90,917 in section 1.9 !70 Chapter Numerical Analysis An average of 54,350 and 87,377 3D elements were used in the unnotched and open-hole ... while dm and df are the degradation factor for matrix and fiber dominated damage which are determined based on equations (4.5) and (4.6) and Figure 37 The compressive un...

Ngày tải lên: 09/09/2015, 08:18

... Fiber Failure 0.5 er Failure 0.4 r Failure er Failure 0.3 0.05 εyy 0.5 -750 Ply Fiber Failure 0.4 150 Ply Fiber Failure -750 Ply Fiber Failure 0.3 Biaxial loading of open-hole crossply laminates Biaxial ... Φopen-hole, due to the offaxis loading angle and the presence of the circular hole in the notched laminates, respectively Table 11 Predicted biaxial strengths...

Ngày tải lên: 09/09/2015, 08:19

... fiber failure 900 Tensile Fiber failure 00 00 B.I ! 900 B.III B.II MATRIX FAILURE FIBER COMPRESSIVE FAILURE FIBER TENSILE FAILURE Figure 56 Progressive failure of on-axis biaxial loading of unnotched ... displacement 300 OFF-AXIS BIAXIAL LOADING OF FINITE ELEMENT [30/-60] 2S DIGITAL IMAGE CORRELATION 150 OFF-AXIS BIAXIAL LOADING OF OPEN-HOLE CROSSPLY LAMINATES 15...

Ngày tải lên: 09/09/2015, 08:19

... Fiber failure in 300 ply Un -notched Crossply Laminates loaded biaxially at 300 off-axis 300 -600 300 A.I A.II A.III Final failure 300 -600 300 B.I B.III B.II ! UNDAMAGED MATRIX FAILURE Figure 58 Progressive ... B.I B.III B.II ! UNDAMAGED MATRIX FAILURE Figure 58 Progressive failure of unnotched crossply laminates biaxially loaded at 300 off-axis A.I-A.III at 0.225 mm appli...

Ngày tải lên: 09/09/2015, 08:19

... Biaxial loading of open-hole crossply laminates ! ! Biaxial loading of open-hole crossply laminatesloading of open-hole crossply laminates Biaxial 300 OFF-AXIS BIAXIAL LOADINGELEMENT FINITE OF ... results ! ! ! Biaxial loading of open-hole crossply laminates ! ! Biaxial loading of open-hole crossply laminates Biaxial loading of open-hole crossply laminates 300 OFF-...

Ngày tải lên: 09/09/2015, 08:20

... significance of this study lies in bridging this gap by means of a realistic yet efficient progressive collapse analysis method for robustness evaluation of buildings The contribution of this thesis ... 157 5.4.1 Strategy 1: Robustness enhancement of new buildings 157 5.4.2 Strategy 2: Robustness enhancement of existing buildings 159 5.5 Robustness e...

Ngày tải lên: 10/09/2015, 09:10