. 2020 Mar 31;6(3):e03716. doi: 10.1016/j.heliyon.2020.e03716

Table 7.

Value-of-weight break-even-point for studied stiffness levels, where (+) means no break-even-point exist as the alternative design reduces both cost and weight while (-) means no break-even-point exists as the alternative design increases both cost and weight. When a break-even-point exists, and V < V_ai, the alternative design is more advantageous than the original design. For comparative values, representative value-of-weight span used in performed case study is 1.5 < V < 1500.

	Break-even-point $V_{a i}$ [€/kg]
Design comparison	K			K_T
Original/alternative	Low	Intermediate	High	Low	Intermediate	High
M_C/M $_{r C}$	568	783.7	728	788.3	181.9	67.3
M_C/M_G	-	6.3	4.7	4.5	4.5	3.4
M_C/SW	+	+	NA	+	+	+
M_C/USP_C	211	+	+	-	-	-

USP_C/USP $_{r C}$	1345	649	661.8	28.2	28.2	28.2
USP_C/USPG	-	-	-	1.4	35.8	14.8
USP_C/SW	+	+	+	+	+	+

SW/M $_{r C}$	-	-	NA	-	-	-
SW/M_G	-	-	NA	-	-	-
SW/USP $_{r C}$	-	-	NA	-	-	-
SW/USPG	-	-	NA	-	-	-