Development and Experimental Verification of a High-Temperature and In-Plane Biaxial Testing Apparatus

Chen, Junxian; Zhang, Jianhai; Zhao, Hongwei

doi:10.3390/machines10111054

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…This loading configuration is representative of the stress state that the components experience in real-world applications. 30,44 In the frame of the biaxial tests, Liu et al 45 proposed a cruciform specimen to identify the hardening behavior of metallic sheets subjected to large deformations. As a first approach, this optimized shape of the cruciform specimen is considered in this study.…”

Section: Resultsmentioning

confidence: 99%

Thermo-visco mechanical behavior of glass fiber reinforced thermoplastic composite

Faddoul,

Rahme,

Guines

et al. 2023

Journal of Composite Materials

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Thermoplastic composite materials are being increasingly used in many domains, such as automotive, marine and aeronautics. This growing interest is due to the relatively good mechanical properties and the recycle-ability of these materials. In various heat assisted forming technologies, thermoplastic composites may be subjected to severe conditions such as high temperatures, complex strain paths and potentially significant strain rates. This is expected to highly influence the overall behavior of these materials and make the characterization of their mechanical behavior more complicated. In this paper, the mechanical behavior of discontinuous glass fiber reinforced polypropylene composite is investigated at temperatures going from room temperature (RT) to 120°C and strain rates ranging from quasi-static conditions to 10 s−1 by means of uniaxial tensile tests. The effect of material orientation is also investigated at RT and quasi-static strain rate of 0.001 s−1 pointing out a clear anisotropic behavior. The tensile properties including Young’s modulus E, ultimate tensile strength σ ult and strain at failure ɛ f are determined based on the Standard ISO-527 reporting an obvious sensitivity of the material to temperature and strain rate. Based on literature review, the phenomenological isotropic constitutive model of G’Sell and Jonas, originally designed for unreinforced semi-crystalline polymers, is selected to describe the mechanical behavior of the studied material. A modification of the original constitutive equation is proposed for a better representation of the overall behavior of the material at different temperature and strain rate conditions. Finally, the validity of this phenomenological law calibrated by means of the uniaxial tests, is evaluated for an equi-biaxial loading state close to that encountered by the material during heat assisted sheet forming process. The significant disagreement highlighted between numerical and experimental results proved that the uniaxial tensile tests are not sufficient to characterize the behavior of the material when a complex loading condition is imposed.

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Section: Resultsmentioning

confidence: 99%

Thermo-visco mechanical behavior of glass fiber reinforced thermoplastic composite

Faddoul,

Rahme,

Guines

et al. 2023

Journal of Composite Materials

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show abstract

“…With the advancement of society and the progress in science and technology, the structural size of major equipment has become increasingly large-scale [ 1 , 2 , 3 ]. However, due to the size effect, small-scale mechanical tests on smooth specimens are no longer sufficient to comprehensively evaluate the mechanical properties of full-size equipment.…”

Section: Introductionmentioning

confidence: 99%

Research on Electro-Hydraulic Servo Resonance Technology

Yang,

Liu,

Zhao

2024

Sensors

Self Cite

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In this paper, an electro-hydraulic servo resonance technology is proposed to meet the loading requirements of a high-frequency sound fatigue test for large tonnage. First of all, we analyze the static and dynamic loading structure of electro-hydraulic servo vibration and establish the vibration equation of the system. Additionally, the modal and vibration characteristics of the system are analyzed by simulation, which verified the feasibility of the proposed electro-hydraulic servo resonant loading technology. Finally, the influence of various factors such as sample stiffness, lead screw stiffness, class II spring stiffness, class II weight mass, lower beam mass, and upper beam mass on the natural frequency and amplification coefficient of the system is analyzed. In this paper, a new technology is proposed to provide theoretical support for the research and development of large-tonnage high-frequency noise fatigue testing equipment.

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A novel mechanical attachment for biaxial tensile test: Application to formability evaluation for DP590 at different temperatures

Wang,

Chu,

Yue

et al. 2024

Journal of Materials Research and Technology

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Development and Experimental Verification of a High-Temperature and In-Plane Biaxial Testing Apparatus

Cited by 5 publications

References 30 publications

Thermo-visco mechanical behavior of glass fiber reinforced thermoplastic composite

Thermo-visco mechanical behavior of glass fiber reinforced thermoplastic composite

Research on Electro-Hydraulic Servo Resonance Technology

A novel mechanical attachment for biaxial tensile test: Application to formability evaluation for DP590 at different temperatures

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