Analisa desain rangka mobil hemat energi urban concept dengan material komposit serat karbon woven dan core material divinycell H-100 terhadap beban vertikal, torsional, lateral, rollbar dan longitudinal = Analysis of the urban concept energy saving car chassis design with woven carbon fiber composite material and divinycell H-100 core material toward vertical, torsional, lateral, rollbar and longitudinal loads