ORCID Profile
0000-0003-4718-3935
Current Organisations
Curtin University
,
Swinburne University of Technology
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Civil Engineering | Pattern Recognition and Data Mining | Structural Engineering |
Expanding Knowledge in Engineering | Expanding Knowledge in Technology
Publisher: Springer Science and Business Media LLC
Date: 10-2017
Publisher: Elsevier BV
Date: 02-2023
Publisher: IEEE
Date: 10-2013
Publisher: Elsevier BV
Date: 12-2021
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier BV
Date: 08-2017
Publisher: Springer Science and Business Media LLC
Date: 09-2010
Publisher: SPIE
Date: 25-03-2010
DOI: 10.1117/12.848570
Publisher: American Physical Society (APS)
Date: 27-04-2018
Publisher: Springer Science and Business Media LLC
Date: 10-02-2015
Publisher: Elsevier BV
Date: 10-2020
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 07-2021
Publisher: Elsevier BV
Date: 04-2020
DOI: 10.1016/J.JMBBM.2019.103603
Abstract: The paper presents for the first time the material properties and energy absorption capacity of durian shells with an attempt to use as an alternative sustainable material and mimic their structural characteristics to design a bio-inspired structure for protective packaging applications. A series of quasi-static compression tests were carried out to determine Young's modulus and bioyield stress of the durian shells as well as their energy absorption capacity. The mesocarp layers and thorns are interesting parts for investigating their energy absorption characteristics because they play an important role in protecting the flesh of durians during their drop impact onto the ground. The mesocarp layers of the shell were subjected to axial and lateral compression while the thorn specimens were compressed under axial loading with an increasing number of thorns. The results showed that the densification strain, plateau stress and specific energy absorption of the mesocarp layer under lateral loading is higher than that under axial loading. Furthermore, the compression tests on the thorns demonstrated that an increase in the number of thorns helped to absorb more energy and the specific energy absorption of the thorns was nearly two times higher than that of the mesocarp layer under the axial loading. In addition, the cyclic loading of the thorns showed that the extent of reversibility of deformation in the thorns decreases from 32% at the first cycle to around 10% at the 9th-cycle. Finally, the microstructure of the thorn and mesocarp layer was investigated to explain the experimental observation. The results indicated that the spherical shape associated with the thorns and mesocarp materials displayed an excellent energy absorption efficiency that can be mimicked to design an effective bio-inspired absorber for packing applications.
Publisher: IOP Publishing
Date: 29-10-2013
DOI: 10.1088/1748-3182/8/4/046008
Abstract: In this study, we experimentally studied the relationship between wingbeat frequency and resonant frequency of 30 in iduals of eight insect species from five orders: Odonata (Sympetrum flaveolum), Lepidoptera (Pieris rapae, Plusia gamma and Ochlodes), Hymenoptera (Xylocopa pubescens and Bombus rupestric), Hemiptera (Tibicen linnei) and Coleoptera (Allomyrina dichotoma). The wingbeat frequency of free-flying insects was measured using a high-speed camera while the natural frequency was determined using a laser displacement sensor along with a Bruel and Kjaer fast Fourier transform analyzer based on the base excitation method. The results showed that the wingbeat frequency was related to body mass (m) and forewing area (Af), following the proportionality f ~ m(1/2)/Af, while the natural frequency was significantly correlated with area density (f0 ~ mw/Af, mw is the wing mass). In addition, from the comparison of wingbeat frequency to natural frequency, the ratio between wingbeat frequency and natural frequency was found to be, in general, between 0.13 and 0.67 for the insects flapping at a lower wingbeat frequency (less than 100 Hz) and higher than 1.22 for the insects flapping at a higher wingbeat frequency (higher than 100 Hz). These results suggest that wingbeat frequency does not have a strong relation with resonance frequency: in other words, insects have not been evolved sufficiently to flap at their wings' structural resonant frequency. This contradicts the general conclusion of other reports--that insects flap at their wings' resonant frequency to take advantage of passive deformation to save energy.
Publisher: Elsevier BV
Date: 05-2015
Publisher: Elsevier BV
Date: 04-2014
Publisher: The Korean Society for Aeronautical & Space Sciences
Date: 30-12-2015
Publisher: Springer Science and Business Media LLC
Date: 09-2016
Publisher: Springer Science and Business Media LLC
Date: 03-04-2012
Publisher: Unpublished
Date: 2013
Publisher: Springer Science and Business Media LLC
Date: 14-01-2019
Publisher: SAGE Publications
Date: 24-11-2017
Publisher: Springer Science and Business Media LLC
Date: 02-2011
Publisher: Informa UK Limited
Date: 18-06-2018
Publisher: Informa UK Limited
Date: 18-06-2018
Publisher: Elsevier BV
Date: 05-2022
Publisher: Public Library of Science (PLoS)
Date: 05-12-2013
Publisher: Elsevier BV
Date: 05-2022
Publisher: American Physical Society (APS)
Date: 17-10-2017
Publisher: SAGE Publications
Date: 30-04-2014
Abstract: Piezoelectric-hydraulic actuator is a hybrid device that consists of a hydraulic pump driven by piezoelectric stacks coupled with a conventional hydraulic cylinder and a set of fast-acting valves. Nowadays, such hybrid actuators are being researched and developed actively in many developed countries by requirement of high performance and compact flight system. In this research, operation principle and performance testing of the hybrid actuator were introduced. Two types of piezo-stacks are selected for experimental performance testing to identify the factors of piezo-stack which affect the performance of the hybrid actuator. The performance of piezo-stacks due to electrical power supply and self-heating was considered. Output no-load velocities and blocked force were measured on performance testing. The results showed that the maximum blocked force was 346 N and no-load velocity was 101 mm/s, resulting in maximum output power of 8.74 W at 1000 V applied voltage and 250 Hz pumping frequency.
Publisher: Elsevier BV
Date: 12-2020
Publisher: Springer Science and Business Media LLC
Date: 2018
Publisher: Elsevier BV
Date: 05-2013
Publisher: American Scientific Publishers
Date: 10-2014
Abstract: The increasing use of piezoelectric generators to harvest energy from various ambient sources requires the establishment of durability data for piezoelectric materials. In this paper, a d3 mode piezocomposite electricity generating element (PCGE) was tested for its durability under cyclic impact loading. For this purpose, a motor driven lever system was designed to apply constant impact force on PCGEs. To investigate the durability of PCGEs, the output voltage of the PCGEs was observed upon repeated application of an impact force until eventual loss of the generated voltage. The experimental results enabled to determine the number of cycles until which PCGEs can be used without loss of their electricity generation performance with respect to the stress level applied on the PCGEs. At low stress level (around 0.76 MPa or lower), the PCGE showed almost insignificant degradation even after 2 million cycles whereas degradation occurred sooner (after 8 x 10(5) cycles) at higher stress levels (around 0.92 MPa or higher). The effects of impact loading on the durability of the PCGEs were also examined by X-ray photographs of the specimens.
Publisher: The Korean Society for Aeronautical & Space Sciences
Date: 30-06-2017
Publisher: Springer Science and Business Media LLC
Date: 06-2014
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 12-2021
Publisher: AIP Publishing
Date: 28-11-2018
DOI: 10.1063/1.5041381
Abstract: The photodissociation dynamics of CH3I and CH2ClI at 272 nm were investigated by time-resolved Coulomb explosion imaging, with an intense non-resonant 815 nm probe pulse. Fragment ion momenta over a wide m/z range were recorded simultaneously by coupling a velocity map imaging spectrometer with a pixel imaging mass spectrometry camera. For both molecules, delay-dependent pump-probe features were assigned to ultraviolet-induced carbon-iodine bond cleavage followed by Coulomb explosion. Multi-mass imaging also allowed the sequential cleavage of both carbon-halogen bonds in CH2ClI to be investigated. Furthermore, delay-dependent relative fragment momenta of a pair of ions were directly determined using recoil-frame covariance analysis. These results are complementary to conventional velocity map imaging experiments and demonstrate the application of time-resolved Coulomb explosion imaging to photoinduced real-time molecular motion.
Publisher: IOP Publishing
Date: 12-10-2011
DOI: 10.1088/1748-3182/6/4/046003
Abstract: Biomimetics is one of the most important paradigms as researchers seek to invent better engineering designs over human history. However, the observation of insect flight is a relatively recent work. Several researchers have tried to address the aerodynamic performance of flapping creatures and other natural properties of insects, although there are still many unsolved questions. In this study, we try to answer the questions related to the mechanical properties of a beetle's hind wing, which consists of a stiff vein structure and a flexible membrane. The membrane of a beetle's hind wing is small and flexible to the point that conventional methods cannot adequately quantify the material properties. The digital image correlation method, a non-contact displacement measurement method, is used along with a specially designed mini-tensile testing system. To reduce the end effects, we developed an experimental method that can deal with specimens with as high an aspect ratio as possible. Young's modulus varies over the area in the wing and ranges from 2.97 to 4.5 GPa in the chordwise direction and from 1.63 to 2.24 GPa in the spanwise direction. Furthermore, Poisson's ratio in the chordwise direction is 0.63-0.73 and approximately twice as large as that in the spanwise direction (0.33-0.39). From these results, we can conclude that the membrane of a beetle's hind wing is an anisotropic and non-homogeneous material. Our results will provide a better understanding of the flapping mechanism through the formulation of a fluid-structure interaction analysis or aero-elasticity analysis and meritorious data for biomaterial properties database as well as a creative design concept for a micro aerial flapper that mimics an insect.
Publisher: IOP Publishing
Date: 04-02-2015
Start Date: 2021
End Date: 2024
Funder: National Natural Science Foundation of China
View Funded ActivityStart Date: 07-2021
End Date: 06-2024
Amount: $290,831.00
Funder: Australian Research Council
View Funded Activity