Numerical analysis of helical dielectric elastomer actuator

Park, Jang Ho; Nair, Saurabh; Kim, Daewon

doi:10.1117/12.2260217

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Thus structure design and nondestructive testing has caught a lot of attention in Aerospace, Mechanical structures and civil engineering, like Zhang et al (2017bZhang et al ( , 2017c, Chen et al (2015Chen et al ( , 2017aChen et al ( , 2017bChen et al ( , 2018, Royston et al (2011). Structure design is the first step to avoid disaster of happening, and nondestructive testing would help the structure to work safely like Hu and Pratt (2010) and Hu et al (2016), Park (2015) and Park et al (2017). Moreover, both experimental and numerical methods have been applied for nondestructive testing, including vibration-based damage detection approaches, like Yam et al (2003) and Chen et al (2007), but these methods could not be used for small damages.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive ultrasonic testing in rod structure with a novel numerical Laplace based wavelet finite element method

Zhang

Shen

et al. 2018

Lat. Am. j. solids struct.

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Rod structure has been widely used in aerospace engineering and civil engineering. Nondestructive testing is a very important method applied to detect unseen flaws in structures, ultrasonic wave nondestructive testing has been used in many areas. Finite Element Method is one of the most widely used numerical methods but would have a high cost when doing simulation on ultrasonic wave due to the requirement of small time interval and element size. Wavelet based finite element method could improve the spatial resolution with fewer elements needed but still needs very small time interval. Laplace transform could easily convert the time domain into frequency and then inverse to time domain. This paper presents an innovative method combining Laplace transform and B-spline wavelet on interval (BSWI) finite element method, which could not only decrease the element number but also increase the time integration interval. Moreover, this innovative method is applied to simulate the ultrasonic wave propagation in 1D rod structure as well as used for nondestructive testing of damages in rod structures.

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