Frequency domain analysis of mechanical properties and failure modes of PVDF at high strain rate

Zhao, Yuehong; Zhang, Yingying; Xu, Jian; Zhang, Mingyue; Yu, Peng; Zhao, Qichong

doi:10.1016/j.conbuildmat.2019.117506

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…where σ b is the tensile strength, MPa; D is the defect depth, mm; R is the pipeline radius, mm; and L is the length of defect, mm. Similarly, by using the Taylor series expansion method, the mean and standard deviation of the allowable working pressure of pipeline are i k j j j j j j j j i k j j j j j j j y { z z z z z z z y { z z z z z z z z i k j j j j j j y { z z z z z z i k j j j j j j j y { z z z z z z z i k j j j j j j j j i k j j j j j j j y { z z z z z z z y { z z z z z z z z i k j j j j j j j j i k j j j j j j j y { z z z z z z z y { z z z z z z z z i k j j j j j j j y { z z z z z z z i k j j j j j j j y { z z z z z z z i k j j j j j j j j i k j j j j j j j y { z z z z z z z y { z z z z z z z z (24) where μ σb , μ d , and μ L are the average values of the tensile strength σ b , defect depth D and defect length L, respectively. σ b , σ D , and σ L are the standard deviations of the tensile strength σ b , defect depth D, and defect length L, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…At present, reliability-based design and evaluation methods have been widely adopted in the fields of aerospace, structural engineering, etc. − Its core is to comprehensively evaluate the impact of various random variables on system security and use the failure probability in a specific limit state to quantify the system risk. The implementation of this method can be divided into the following steps: first, establish the limit state equation by identifying the relevant failure mode; second, establish the probability distribution model of each random variable in the limit state equation through the uncertainty distribution of each variable; then, the limit state equation is solved to calculate its failure probability; finally, the failure probability under each failure mode (limit state) is compared with the target reliability to determine whether the system is safe.…”

Section: Reliability-based Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Study on Restart Safety of Waxy Crude Pipelines Based on Reliability Principle under Constant Flow

Liu

Lei

et al. 2022

ACS Omega

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The restart process of waxy crude pipelines is an unsteady thermo-hydraulic coupling process, which mainly includes two modes of the constant flow and constant pressure in industry. However, some parameters involved in the restart process have obvious uncertainties, such as the operating parameters, physical parameters of crude oil, environmental parameters, and pipeline parameters, resulting in the traditional deterministic method that cannot scientifically describe the safety of the pipeline restart process. To do this, this study introduces the reliability-based limit state method and interference principle into the safety evaluation of waxy crude pipelines during the restart process. Considering the random fluctuation characteristics of the mentioned parameters, the restart physical process, the flow and heat transfer mathematical model, and the restart failure limit state function were established. On this basis, the failure probability during the restart process for one waxy crude pipeline under constant flow was determined. This research has realized the quantitative evaluation of restart safety of waxy crude pipelines.

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Section: Resultsmentioning

confidence: 99%

Section: Reliability-based Methodsmentioning

confidence: 99%

Study on Restart Safety of Waxy Crude Pipelines Based on Reliability Principle under Constant Flow

Liu

Lei

et al. 2022

ACS Omega

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show abstract

“…Processes 2023, 11, 2432 2 of 13 The next section discusses the different modes vibration in piezoelectric materials. In mechanical oscillators, the modes are commonly used [9][10][11]. Measurement of this parameter is essential for optimizing the performance of the piezoelectric material including critical quality control parameters for ensuring the consistent and reliable performance of these materials in various applications.…”

Section: Introductionmentioning

confidence: 99%

Development of Ultrasound Piezoelectric Transducer-Based Measurement of the Piezoelectric Coefficient and Comparison with Existing Methods

Ravikumar

Markevičius

2023

Processes

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Energy harvesting using the piezoelectric material in the development of compact vibration energy harvesters can be used as a backup power source for wireless sensors or to fully replace the use of fossil-resource-wasting batteries and accumulators to power a device or sensor. Generally, the coefficient is used as the metric for evaluating the property in materials. Recent research reports that accurate measurement and calculation of the coefficient in materials, especially in polymers, can be challenging for various reasons. From the reviewed references, different methods, including the quasi-static, dynamic, interferometric, and acoustic methods, are discussed and compared based on the direct and indirect effect, accuracy, repeatability, frequency range, and so on. A development of an ultrasound piezoelectric transducer is conducted to estimate d33 coefficient with a reference value. The purpose of the method was mainly to measure the values of piezoelectric material in order to measure the efficiency of the poling process in piezoelectric materials. The test setup described in this study allowed for the effective measurement of the d33 factor of piezoelectric materials using a 1.4 MHz PZT ultrasonic piezoelectric transducer. The arrangement of the components, including the use of organic glass, copper, and aluminum electrodes, ensured accurate and reliable measurements. This setup can be valuable for various applications requiring the characterization of piezoelectric materials and for understanding their behavior under specific conditions. The advantages and challenges in this method are discussed and compared with existing works.

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“…Ross et al [25] studied the failure mode of metal roof under the impact of wind-induced fragments and explained the failure mechanism. Zhao et al [26] and Zhang et al [27] studied the dynamic mechanical properties of PVC membranes from the perspective of failure mode and frequency domain.…”

Section: Introductionmentioning

confidence: 99%

Impact Tensile Behaviors of PVDF Building Coated Fabrics

Zheng

Zhuang

et al. 2020

Advances in Civil Engineering

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The paper presents the impact tensile behaviors of two common building membranes (Ferrari 1002T2 membrane and XYD 300N membrane) in PVDF-coated-fabric membrane structures. The tests are conducted using the split Hopkinson bar test device. Typical forms of stress and strain are applied for comparing the stress-strain relationship between quasi-static and high strain rates. Besides, the failure mechanism and energy absorption at high strain rates are discussed. The results show that with the increase of strain rates, the growth rate of the stress of PVDF membrane decreases gradually, which is different from the stress-strain relationship in low strain rates. At high strain rates, the ultimate tensile strength increases linearly with the increase of strain rates. In addition, the energy absorption capacity of the material increases with the increase of strain rates. The results can provide an important basis for the design and analysis of membrane structures under the impact loads.

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Frequency domain analysis of mechanical properties and failure modes of PVDF at high strain rate

Cited by 10 publications

References 18 publications

Study on Restart Safety of Waxy Crude Pipelines Based on Reliability Principle under Constant Flow

Study on Restart Safety of Waxy Crude Pipelines Based on Reliability Principle under Constant Flow

Development of Ultrasound Piezoelectric Transducer-Based Measurement of the Piezoelectric Coefficient and Comparison with Existing Methods

Impact Tensile Behaviors of PVDF Building Coated Fabrics

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