A stringer to be coupled to a skin of an aircraft, the stringer comprising: a flange including a first portion of a first stiffening segment, a first portion of a second stiffening segment coupled to the first portion of the first stiffening segment, and a carbon fiber reinforced plastic (CFRP) reinforcement segment coupled to the first portion of the first stiffening segment and to the first portion of the second stiffening segment, the CFRP reinforcement segment to strengthen the first portion of the first stiffening segment and the first portion of the second stiffening segment, wherein the first stiffening segment includes a first surface and a second surface located opposite the first surface, wherein the first stiffening segment is formed from multiple plies of material sandwiched between the first surface and the second surface, wherein the second stiffening segment includes a first surface and a second surface located opposite the first surface, wherein the second stiffening segment is formed from multiple plies of material sandwiched between the first surface and the second surface, wherein the first stiffening segment includes a first end formed by the first portion of the first stiffening segment, and a second end formed by a second portion of the first stiffening segment, wherein the first end has a flat edge extending between the first surface and the second surface, wherein the second stiffening segment includes a first end formed by the first portion of the second stiffening segment, and a second end formed by a second portion of the second stiffening segment, wherein the first end has a flat edge extending between the first surface and the second surface, wherein the second end of the first stiffening segment has a chamfered edge extending between the first surface and the second surface, wherein the chamfered edge has a chamfer angle of between twelve and eighteen degrees relative to the first surface of the first stiffening segment along the second portion of the first stiffening segment. a flange including a first portion of a first stiffening segment, a first portion of a second stiffening segment coupled to the first portion of the first stiffening segment, and a carbon fiber reinforced plastic (CFRP) reinforcement segment coupled to the first portion of the first stiffening segment and to the first portion of the second stiffening segment, the CFRP reinforcement segment to strengthen the first portion of the first stiffening segment and the first portion of the second stiffening segment, wherein the first stiffening segment includes a first surface and a second surface located opposite the first surface, wherein the first stiffening segment is formed from multiple plies of material sandwiched between the first surface and the second surface, wherein the second stiffening segment includes a first surface and a second surface located opposite the first surface, wherein the second stiffening segment is formed from multiple plies of material sandwiched between the first surface and the second surface, wherein the first stiffening segment includes a first end formed by the first portion of the first stiffening segment, and a second end formed by a second portion of the first stiffening segment, wherein the first end has a flat edge extending between the first surface and the second surface, wherein the second stiffening segment includes a first end formed by the first portion of the second stiffening segment, and a second end formed by a second portion of the second stiffening segment, wherein the first end has a flat edge extending between the first surface and the second surface, wherein the second end of the first stiffening segment has a chamfered edge extending between the first surface and the second surface, wherein the chamfered edge has a chamfer angle of between twelve and eighteen degrees relative to the first surface of the first stiffening segment along the second portion of the first stiffening segment.