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statics > joints and their reactionary forces > Flashcards

joints and their reactionary forces Flashcards

to memorize the different types of joints and their reactionary forces in both 2d and 3d.

1
Q

cable (2d)

A

one unknown (F)

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2
Q

weightless link (2d)

A

one unknown(F along axis of link)

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3
Q

roller (2d)

A

one unknown(F perpendicular point of contact)

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4
Q

rocker (2d)

A

one unknown (F acts perpendicular point of contact)

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5
Q

smooth contacting surface (2d)

A

one unknown (F acts perpendicular point of contact)

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5
Q

roller or pin in confined smooth slot(2d)

A

one unknown (F acts perpendicular slot)

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6
Q

member pin connected to collar on smooth rod (2d)

A

one unknown (F acts perpendicular rod)

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7
Q

smooth pin or hinge (2d)

A

Two unknowns(Ax,Ay), or could make up resulting force Fcos(theta) Fsin(theta)

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8
Q

member fixed connected to collar on smooth rod (2d)

A

two unknowns(reactions are the couple moment, and the force perpendicular to rod)

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9
Q

fixed support (2d)

A

three unknowns(reactions are the couple moment and the two force components, or the couple moment an the magnitude and direction (theta) of the resulting force.

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10
Q

cable (3d)

A

one unknown(force which acts away from member in direction of cable)

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11
Q

smooth surface support (3d)

A

One unknown. (reaction is a force which acts perpendicular to the surface at the point of contact)

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12
Q

roller (3d)

A

One unknown. (reaction is a force which acts perpendicular to the surface at the point of contact.

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13
Q

ball and socket (3d)

A

three unknowns(the reactions are three rectangular force components)

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14
Q

single journal bearing (3d)

A

Four unknowns. (reactions are two force components, because a journal bearing allows movement along the axis of the shaft. couples not applied if supported elsewhere)

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15
Q

single journal bearing with square shaft (3d)

A

Five unknowns.(reactions are 2 force and 3 couple-moment components.)couples not applied if supported elsewhere

16
Q

single thrust bearing (3d)

A

five unknowns.(reactions are 3 force components, because a thrust prevents movement along the axis of the shaft, and two couple-moment components.)couples not applied if supported elsewhere

17
Q

single smooth pin (3d)

A

five unknowns.(The reactions are three force and two couple-moment components.)couples not applied if supported elsewhere

18
Q

single hinge (3d)`

A

Five unknowns.(The reactions are three force and two couple-moment components.couples not applied if supported elsewhere

19
Q

fixed support

A

Six unknowns.(the reactions are three force and three couple-moment components)

statics (1 decks)

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