...Penghui Zhang; Hui Wu; Shiwei Ma; Kaihua Huang To address the problem of quantitative analysis for delamination damage in composite materials, a method of evaluating delamination area based on Lamb waves multiscale features is proposed. In this method, the Lamb wave scattering signals are collected...

... of solar energy for water desalination has become the subject of many local and global researchers. To solve this problem, we carried out an experimental study on two solar stills with a single slope. One was provided by a new absorber designed with multilayer composite materials and the other still...

... the apparatus used to conduct the four bond tests, the single shear test was demonstrated to be the most effective for determining the actual bond performances of FRCM composites. 01 10 2020 15 12 2020 02 04 2021 fabric-reinforced cementitious matrix composite materials bond test...

...A. R. Jac Fredo; R. S. Abilash; R. Femi; N. Sri Madhava Raja; C. Suresh Kumar In this work, damages in composite materials are characterized using geometrical and Fourier-Hu shape descriptors. Digital images are acquired from the front and rear sides of composite materials after 5-, 6-, and 7-mm...

..., and springline, where there were high flexural tensile stresses. 28 05 2018 22 01 2019 01 04 2019 concrete pipes sewers composite materials fiber-reinforced concrete short-term testing long-term testing synthetic fiber References Plastics Pipe Institute “ Design Methodology...

... crack width), ultimate load, stiffness, and ductility of tested pipes. Also, using synthetic fiber lowered the production cost, as the reduction in the steel cage area ranged from 51 to 100 %. Keywords concrete pipe, sewer, composite materials, structural design, fiber reinforced concrete, synthetic...

... II Delamination Using the 4ENF ,” Proceedings of the Fourth European Conference on Composite Materials: Testing and Standardization , Aug 31st–Sept 2nd, 1998, Lisbon, Portugal, Institute of Materials , London, UK , pp. 161 – 170 . Sun , X. and Davidson , B. D. , “ A Direct Energy...

...' specific clamping pressure loss over 24 h was established. 30 07 2003 23 03 2005 07 09 2005 adhesives composite materials wood creep mechanism rate effects viscoelasticity laminates glulam References Blomquist , R. F. , Christiansen , A. W. , Gillespie , R...

.... In addition, it appears unlikely that sufficient bearing can be developed in smaller lumber sizes to make the five-point bending method reflective of the true shear capacity. KEYWORDS: bearing plates, finite-element analysis, compression stress, shear stress, wood test methods, composite materials, nonlinear...

... not significantly differ from those of the thermally cycled samples. 29 01 1996 13 07 1996 composite materials fiber-matrix interphases ultrasonic velocity method determination of composite and interphase moduli micromechanical models fracture and thermal cycling References Kerans...

... is also significant, and 90° is better than 110° in reducing the variation of shear stress distribution, and (c) some two-factor interactions are influential. 18 10 1994 14 09 1995 statistical design of experiments finite element methods shear tests composite materials...

...AL Svenson; MW Hargrave; LC Bank; BS Ye This paper discusses data analysis techniques for instrumented impact tests conducted on glass fiber composite materials. For this study, a drop weight tower has been instrumented with an accelerometer and computer data acquisition system. From...

...E Greenspan A preliminary investigation of the effectiveness of new composite materials under development for shielding against neutrons and photons is reported upon. These materials are made from a proper mix of powders of tungsten, titanium or zirconium hydride and boron carbide, all bonded...

... for shear strength. 06 07 1988 09 01 1989 shear tests codes (standards) testing test methods stiffness shear modulus shear strength stress analysis sandwich construction composite materials References O'Sullivan , H. P. , “ Double Block Shear Test for Foil Honeycomb...

...SA Suarez; RF Gibson The dynamic mechanical properties of composite material specimens are rapidly determined by using two new computer-aided impulse techniques. Small beam specimens are excited in either flexural or extensional vibration by an electromagnetic hammer with a force transducer in its...

...S Cheng A test method for the determination of the shear modulus and the modulus of elasticity of laminated anisotropic composite materials is presented. Two tests are required. In one test, a ring is simply supported at two diametrically opposite supports and subjected to two diametrically...

... and the strength of the composite materials (PMC and concrete). No transverse steel was used in these specimens. Group B specimens contained various amounts of shear reinforcement at the shear interface. Group C specimens were cast monolithically using ordinary concrete to serve as control specimens. Group D were...

... was modified for use. The rate sensitive material properties of unidirectional glass/epoxy and graphite/epoxy composite materials were investigated. The micromechanics of fracture within the composite caused by impact were studied, using partially loaded impact test specimens and scanning electron microscopy...

...S Fischer; I Roman; H Harel; G Marom; HD Wagner An experimental method is described to calculate both shear and Young's moduli of composite materials by three-point bending. The proposed procedure includes appropriate corrections for certain extraneous effects. The importance of the two basic...

.... KEY WORDS: accelerated tests, composite materials, durability, surface-laminated glass-fiber reinforced polyester, surface degradation, scanning electron microscopy For examination of acrylic-lacquer-coated and PVF-laminated GRPs, the instrument was operated at 5 kV rather than 20 kV to prevent...