Abstract
Recent developments in (AM) additive developed normally Three-dimensional (3D) printing is a term used to describe printing that is three-dimensional in nature, have enabled researchers to use traditional production methods to create previously unthinkable, complex shapes. Usage of smart materials by the way of adopting the external stimuli in printing is part of a 3D-printing research division called 4D-printing.4D-printing allows for the development of dynamically controllable shapes on-demand by the addition of sometime as another dimension. The potential of 4D-printing has been significantly expanded by recent advances intelligent synthetic materials, new printers, processes of deformation and mathematical modelling. This paper deals with improvement in the area of 4D-printing, with a importance on its practical applications. With explications of their morphing mechanisms, Smart materials are discussed and produced using 4D-printing. Moreover, case study on soft robotics is discussed. We end with 4D Printing problems and future opportunities.
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