نتایج جستجو برای: strain rate sandwich composites

تعداد نتایج: 1206895  

2013
Trisha Sain Julien Meaud Greg Hulbert Ellen M. Arruda Anthony M. Waas

We present results for stiffness and damping prediction in a class of layered, wavy, metal–polymer composites that exceed conventionally published stiffness-damping maps (The Wang–Lakes line, see [14]). These composites are realized by judiciously placing selected, wavy, metal sheets that sandwich an ultra-thin layer of polymer. Stacks of alternating metal–polymer layered composites, when compr...

Journal: :Journal of physics 2023

Abstract Impact damage may reduce the mechanical property of honeycomb sandwich composites. In this paper, impact and post-impact shear behavior plates are studied experimentally. The same energy was applied to all six test specimens. region depth crater were measured by using equipment. Shear tests conducted on intact damaged specimens compare their strain fields failure modes. results show th...

2017
L. Welsh J. Harding

Tensile stress-strain curves a r e obtained at s t rain rates of %lo-'+, ~ 1 0 and c1000/s for carbon, Kevlar and glass fibre woven-reinforced polyester resin compos i tes and the variation of modulus, tensile strength and fracture strain with strain rate is determined. A change in the failure mode at the highest strain rates is observed for the glass but not the carbon or Kevlar reinforced com...

A Kudin, M.A.V Al Omari S Choporov Yu Tamurov

Herein paper compares the analytical model with the FEM based numerical model of the axisymmetric bending of circular sandwich plates. Also, the paper describes equations of the circular symmetrical sandwich plates bending with isotropic face sheets and the nonlinear elastic core material. The method of constructing an analytical solution of nonlinear differential equations has been described. ...

Journal: :Journal of the mechanical behavior of biomedical materials 2011
J A De Souza S Goutianos M Skovgaard B F Sørensen

The fracture resistance (R-curve behaviour) of two commercial dental composites (Filtek Z350(®) and Concept Advanced(®)) were studied using Double Cantilever Beam sandwich specimens loaded with pure bending moments to obtain stable crack growth. The experiments were conducted in an environmental scanning electron microscope to (a) accurately measure the applied energy-release rate for crack ini...

Journal: :international journal of iron & steel society of iran 2012
a. khosravifard m. m. moshksar r. ebrahimi

advanced high strength steels (ahss) have recently attracted great attention because of their superior mechanical properties. a modern group of these steels, known as twinning induced plasticity (twip) steels, shows a unique combination of strength and ductility even at high rates of strain. in order to examine the functionality of such steels in dynamic loading conditions, their mechanical beh...

2001
Thomas S. Gates Helen M. Herring

A new novel test method, associated analysis, and experimental procedures are developed to investigate the toughness of the facesheet-to-core interface of a sandwich material at cryogenic temperatures. The test method is designed to simulate the failure mode associated with facesheet debonding from high levels of gas pressure in the sandwich core. The effects of specimen orientation are conside...

Journal: :archives of cardiovascular imaging 0
zahra ojaghi haghighi echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran; md, facc,echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran. tel: +98-2123922134, fax: +98-2122055594 azin alizadehasl cardiovascular research center, tabriz university of medical sciences, tabriz, ir iran majid maleki echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran nasim naderi echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran maryam esmaeilzadeh echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran fereidoon noohi echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran

background recently, assessment of the atrial motion and deformation indices obtained via doppler myocardial imaging (dmi) has been proposed as a new method of exploring the atrial function. objective our aim was to assess the right atrial (ra) regional function using myocardial velocities, strain, and strain rate imaging (sri) and compare it with the function of the inter-atrial septum (ias) a...

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