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### Single Dissimilar Materials Lap Joint Equations and Calculator

Fastener, Bolt and Screw Design Torque and Force Calculations

Single Lap Joint with Dissimilar Materials Loads Calculator and EquationsIf the joint is a single lap joint as shown below and are subjected to temperature changes, the equation for the loads in the materials as as follows:

Preview Single Lap Joint with Dissimilar Materials Loads Calculator

Eq. 1

$P=\frac{{\alpha}_{1}{L}_{1}({T}_{1}-{T}_{0})-{\alpha}_{2}{L}_{2}({T}_{2}-{T}_{0})+{g}_{1}+{g}_{2}}{{L}_{1}/{A}_{1}{E}_{1}+{L}_{2}/{A}_{2}{E}_{2}}$

Figure 1, Single Lap Joint

Where

A_{1} = Section area of plate 1

A_{2} = Section area of plate 2

L = length

g_{1} = gap plate 1

g_{2} = gap plate 2

E = modulus of elasticity

T_{0} = Initial temperature

T_{2} = final temperature plate 1

T = final temperature plate 2

α_{1} = Coefficient of thermal expansion plate 1

α_{2} = Coefficient of thermal expansion plate 2

P = load

- Bell Helicopter Structural Design Manual, 1977

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