[ELNK] Elastic Link

    "ELNK": {
        "NODE": {
            "__DESC__": "NODES",
            "__TYPE__": [
                "Integer",
                "Integer"
            ]
        },
        "LINK": {
            "__DESC__": "Sub Option",
            "__TYPE__": "String"
        },
        "ANGLE": {
            "__DESC__": "Angle",
            "__TYPE__": "Real"
        },
        "R_S": {
            "__DESC__": "R_SDx R_SDy R_SDz R_SRx R_SRy R_SRz",
            "__TYPE__": [
                "Bool",
                "Bool",
                "Bool",
                "Bool",
                "Bool",
                "Bool"
            ]
        },
        "SDR": {
            "__DESC__": "SDx SDy SDz SRx SRy SRz",
            "__TYPE__": [
                "Real",
                "Real",
                "Real",
                "Real",
                "Real",
                "Real"
            ]
        },
        "bSHEAR": {
            "__DESC__": "SHEAR",
            "__TYPE__": "Bool"
        },
        "DR": {
            "__DESC__": "DRy DRz",
            "__TYPE__": [
                "Real",
                "Real"
            ]
        },
        "BNGR_NAME": {
            "__DESC__": "Boundary Group Name",
            "__TYPE__": "String"
        },
        "DIR": {
            "__DESC__": "Direction",
            "__TYPE__": "Integer"
        },
        "MLFC": {
            "__DESC__": "Function",
            "__TYPE__": "Integer"
        },
        "DRENDI": {
            "__DESC__": "DistRatioEndI",
            "__TYPE__": "Real"
        }
    }

Introduce Input Data Symbols

API - Value Type		Input Data

API - Value Type	Input Data
Integer	🔴	Essential
String	❌	Unnecessary
Boolean	🔺	Optional
Real

The required Input Data for defining Elastic Link

NO.	Name	API - Key	API - Value Type	Default	Elastic Link

NO.	Name	API - Key	Default	Elastic Link
1	Elastic Link No.	“KEY”		🔴
2	Boundary Group Name	"BNGR_NAME"		🔺
3	NODE No.	"NODE"		🔴
4	Elastic Link type General : “GEN” Rigid : "RIGID" Tension Only : "TENS" Compression Only : "COMP" Multi-Linear : "MULTI LINEAR" Saddle : "SADDLE" Rail Track Interaction : "RAIL INTERACT"	"LINK"		🔴
5	Beta Angle	"ANGLE"	0	🔺
6	Stiffness SDx SDy SDz SRx SRy SRz	"SDR"		🔺
7	Rigid SDx, SDy, SDz, SRx, SRy, SRz	"R_S"		🔺
8	Shear Spring Location (General & Multi-Linear Only)	"bSHEAR"	FALSE	🔺
9	Distance Ratio from End I [SDy, SDz] (General & Multi-Linear Only)	"DR"		🔺
	Multi-Linear
10	Direction Dx : 0 Dy : 1 Dz : 2 Rx : 3 Ry : 4 Rz : 5	"DIR"	0	🔺
11	Force-Deformation Function No.	"MLFC"		🔴
12	Dist. Ratio from End I (Direction : Dy, Dz, Ry, Rz only)	"DRENDI"	0	🔺
	Rail Track Interaction
13	Direction Dy : 1 Dz : 2	"DIR"		🔺
14	Rail-Track Interaction Function No.	"RLFC"		🔺

The JSON format example for inputting Elastic Link

    "ELNK": {
        "1": {
            "NODE": [
                1,
                2
            ],
            "LINK": "GEN",
            "ANGLE": 45.5,

            "SDR": [
                1.0,
                2.0,
                3.0,
                4.0,
                5.0,
                6.0
            ]
        }
    }

    "ELNK": {
        "1": {
            "NODE": [
                1,
                2
            ],
            "LINK": "RIGID",
            "ANGLE": 45.4
        }
    }