2-3 July 2024
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UKM-Unsyiah (Universiti Kebangsaan Malaysia-Universitas Syiah Kuala) collaboration can be traced back to a visit Prof Ir Dr Ahmad Kamal Ariffin paid to Tokyo Institute of Technology in January 2003. Prof Ariffin was greeted by Prof Shigeru Aoki and (late) Dr Ir Muhammad Ridha (then a research scientist from Unsyiah at the Tokyo Institute of Technology). The meeting led to the formation of a committee to organize a focused conference named Computational Mechanics and Numerical Analysis (CMNA). The first CMNA was then held in Banda Aceh, Indonesia, in April 2003. Five series of CMNA were organized from 2003 to 2007.
Later in November 2003, Prof Ariffin invited Dr Ridha to deliver a lecture on Boundary Element Method, Inverse Analysis, and Their Application on Infrastructure Corrosion. The guest lecture was held in UKM at Bangi, Malaysia. Dr Ridha's visit established the first formal collaboration between Department of Mechanical Engineering, Universitas Syiah Kuala (now Department of Mechanical and Industrial Engineering) and the Department of Mechanical and Materials Engineering, Universiti Kebangsaan Malaysia (now Department of Mechanical and Manufacturing Engineering). The collaboration saw back-and-forth scholarly visits between Unsyiah and UKM, as well as Master and PhD students exchanges. The collaboration has generated numerous publications since 2004.
31 May 2024
15 April 2024
2-3 July 2024
Speaker List
Abstract
The recent surge in the number of studies on seismic metamaterials is testimony to the fact that the concept of photonic crystals, phononic crystals and acoustic metamaterials [1-3] is no longer limited to basic theories and dynamic characteristics. Apart from the peculiar observation including negative stiffness, negative mass density negative refraction properties, etc., auxetic metamaterials that govern negative Poisson’s ratio, nonreciprocal wave phenomena, origami/kirigami effects also find potential applications in geophysics and earthquake engineering [4-5]. Except man-made synthetic resonators/metastructures, recently forest trees at geophysical scale are reported as naturally available seismic metamaterials with capability to mitigate ground born ambient vibrations and incoming seismic waves at subwavelength frequency region. The work to be presented here elaborates a class of materials and structures ranging from engineered phononic crystals and acoustic metamaterials in Fig (a,b) to natural seismic metamaterials in Fig. (c,d) that show exotic yet with outstanding application potentials. Besides discussing the peculiar yet wonderful wave propagation characteristics of periodic structures for wave active control, topological protected interface modes, etc., the exciting wave dispersion response that found applications for manipulation Rayleigh wave and possible forestation as a means for geographical regional isolation against ground surface wave motion will also be presented
Abstract
Abstract
