Results 21 to 30 of about 133,004 (298)
Measurement of Relaxation Modulus of Viscoelastic Materials and Design of Testing Device
Applied Sciences, 2023 Viscoelastic parameters of viscoelastic materials should be measured to ensure their effective use. Unfortunately, devices for effective and accurate measurement of the relaxation modulus of materials are not currently available.
Lunlun Wan, Fuyan Lin
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Hecheng xiangjiao gongye, 2023 The relationship between crosslinking density and storage modulus of chloroprene rubber (CR) / ethylene-propylene-diene rubber (EPDM) blend was studied and the fitting model was established.
WANG Chen-yang, DENG Tao
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Constant Modulus Shaped Beam Synthesis via Convex Relaxation [PDF]
IEEE Antennas and Wireless Propagation Letters, 2017 Constant modulus shaped beam synthesis is widely employed in multiple-input–multiple-output (MIMO) radar systems and MIMO wireless communication systems to improve the effective power gain by using only phase adjustment. To achieve the maximum beam gain, we formulate a new optimization problem to maximize the main lobe gain and also properly suppress ...
Cao, Pan, Thompson, John, Haas, Harald
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Young's modulus and ?-relaxation of amorphous polymers [PDF]
Journal de Physique III, 1991 The mechanical behaviour of polymers have been studied as a function of time and temperature. The influence of a critical temperature or critical strain rate have been pointed out which may be related to relaxation phenomena. This study, carried out on Poly Methyl Methacrylate, shows that this relaxation phenomena can be associated to the β-relaxation.
Muracciole, Jean-Michel, Bertin, Y.
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Journal of Materials Research and Technology, 2023 Metal/polymer laminates are important lightweight construction composite materials. In search of economical alternatives of expensive traditional processes, feasibility of Single Point Incremental Forming (SPIF) to process laminates is being analyzed ...
Abdul Qadeer +3 more
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Structural Relaxation Monitored by Instantaneous Shear Modulus [PDF]
Physical Review Letters, 1998 This paper reports on aging of the silicone oil MS704 for sudden changes of temperature from 210.5 to 209.0 K and from 207.5 to 209.0 K studied by continuously monitoring the instantaneous shear modulus G‘. The results are interpreted within the Tool-Narayanaswamy formalism with a reduced time definition based on a recently proposed expression for the ...
Niels Olsen +2 more
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Nonlinear Analysis of Thermoviscoelasticity of Laminated Composites [PDF]
Engineering and Technology Journal, 2010 The nonlinear thermoviscoelastic behavior of composite thin plates isinvestigated. An experimental program covers an achievement of creep tests under different temperatures, dimensions of specimens and distribution loads to describe the equation of creep
Muhsin J.Jweeg +2 more
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Instantaneous Modulus Test of Solid Propellant and the Impact on the Structural Integrity of the Charge [PDF]
Hangkong bingqiHydroxyl-terminated polybutadiene (HTPB) propellant is investigated in this study. At three initial tensile strain rates of 100 %/s, 50 %/s and 12 %/s, the propellant relaxation modulus tests are carried out, and the relaxation modulus curves of the ...
Wang Yibo, Tang Qi, Dong Meng, Jiang Pengchen
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Structural relaxation in silicate melts and non-Newtonian melt rheology in geologic processes [PDF]
, 1989 The timescale of structural relaxation in a silicate melt defines the transition from liquid (relaxed) to glassy (unrelaxed) behavior. Structural relaxation in silicate melts can be described by a relaxation time, , consistent with the observation that ...
Dingwell, Donald B., Webb, Sharon L.
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Effect of Microstructure on Micro-Mechanical Properties of Composite Solid Propellant
Micromachines, 2021 This study was aimed at determining the effect of microstructure on the macro-mechanical behavior of a composite solid propellant. The microstructure model of a composite solid propellant was generated using molecular dynamics algorithm.
Tianpeng Li +3 more
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