Shape memory materials with reversible transitions

A structure, comprising:

• a composite structure that forms at least 2n predefined shapes at defined stimulus values, where at least one of the defined stimulus values is a measure of acidity, and where n is a number of different shape memory materials, the composite structure comprising:
• a flexible substrate, wherein the flexible substrate is a fiber-epoxy composite, wherein the flexible substrate has a first surface and a second surface;
• a first shape memory material having a first transition trigger to transition the first shape memory material between a first initial state and a first transitioned state, wherein the first transitioned state is shaped different from the first initial state, and wherein the first shape memory material is bonded to the flexible substrate;
• a second shape memory material having a second transition trigger to transition the second shape memory material between a second initial state and a second transitioned state, wherein the second transitioned state is shaped different from the second initial state, and wherein the second shape memory material is bonded to the flexible substrate;
• a third shape memory material having a third transition trigger to transition the third shape memory material between a third initial state and a third transition state, wherein the third transition state is shaped different from the third initial state, and wherein the first and third shape memory materials are clad together;
• a fourth shape memory material having a fourth transition trigger to transition the fourth shape memory material between a fourth initial state and a fourth transitioned state, wherein the fourth transitioned state is shaped different from the fourth initial state, and wherein the second and fourth shape memory materials are clad together;
• and
• wherein each of the first, second, third, and fourth shape memory materials are different, wherein each of the first, second, third, and fourth transition triggers are different defined stimulus values,
• wherein the first shape memory material and the second shape memory material are bonded directly to the first surface of the flexible substrate,
• a first physical shape of the at least 2n predefined shapes when the first shape memory material has the first initial state, the second shape memory material has the second initial state, the third shape memory material has the third initial state, and the fourth shape memory material has the fourth initial state,
• a second physical shape of the at least 2n predefined shapes when the first shape memory material has the first transitioned state, the second shape memory material has the second initial state, the third shape memory material has the third initial state, and the fourth shape memory material has the fourth initial state,
• a third physical shape of the at least 2n predefined shapes when the first shape memory material has the first transitioned state, the second shape memory material has the second transitioned state, the third shape memory material has the third initial state, and the fourth shape memory material has the fourth initial state,
• a fourth physical shape of the at least 2n predefined shapes when the first shape memory material has the first transitioned state, the second shape memory material has the second transitioned state, the third shape memory material has the third transitioned state, and the fourth shape memory material has the fourth initial state, and
• a fifth physical shape of the at least 2n predefined shapes when the first shape memory material has the first transitioned state, the second shape memory material has the second transitioned state, the third shape memory material has the third transitioned state, and the fourth shape memory material has the fourth transitioned state.