A method of modeling the spring-in effect of a component such as an FRP structure using a 2D shell model

摘要

The invention relates to a method for modeling the spring-in effect (folding angle) of a component such as an FRP structure using a 2D shell model, the method comprising the following steps: providing a data set which has a cross-section of the FRP Describes a structure before its deformation by a component delay, - performing a computer-aided simulation for the undeformed cross section of the FRP structure on the basis of the provided data set as a 2D shell model, - deriving an angle φ from the network of the 2D shell model before generating a spring In, calculating the expected FVK structure snap-in angle using the analytic formula: where the angle φ is derived from the network of the 2D shell model of the undeformed FVK structure, the thermal expansion coefficient is orthogonal to the jump-in Edge in the network of the 2D shell model, αthe expansion coefficient in the thickness direction (direct material k nominal value) and ΔT represent the cooling temperature, andgenerating the spring-in (collapsing by the angle Δφ in the 2D shell model, shell calculation model) by imposing at least one modified in-plane thermal expansion coefficient in at least one layer of the FRP structure in the 2D shell model such that Cooling the FRP structure from solidification to room temperature causes the folding effect.