Modeling of Elastic Responses

Assuming the specimen as a simply-supported beam loaded by two loads, P, beam theory can be used to calculate the elastic midspan deflection, S  

By discretizing the lower face sheet into 17 layers of almost 1 mm thickness and the time domain into 60 time steps (thus 1 min per time step for SLC03 and 2 min for SLC02), the calculation process for the midspan deflections for each time step is as follows  

1) The temperature of each layer is calculated using the thermal response model (Chapter 6). 

4) The stiffness, El, of the whole cross section is calculated using Eq. (7.2). 

5) Incorporating El obtained at each time step into Eq. (7.1), the time-dependent midspan deflection is calculated, as shown in Eigure 7.5 for SLC03 and SLC02 (curves labeled considering stiffness degradation ). 

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