You may assign the properties of target as per described in DIANA manual and check your model once. Properly assign these penetration values

the relative maximum depth

the relative distance from the element face or you may check DIANA contact behaviour 12.3.3.

Upadesh Marahatta In DIANA software, performing contact analysis entails several stages, including describing the shape and mesh, configuring the contact parameters, and designating the load and boundary conditions. Here's a high-level summary of the procedure:

1. Establish the shape and mesh: Create a 3D model of the masonry building in DIANA program first. This may entail importing geometry from CAD tools or manually creating the model in DIANA. Create a mesh using the proper element classes and mesh density once the shape has been specified.

2. Configure the communication parameters: The Target Element Method is used in DIANA software for contact analysis. (TEM). This entails specifying the contact areas and setting up the specifications for the target element. Select the right contact element type (e.g., CONTA175) and define the target element's characteristics, such as contact stiffness, friction, and penetration depth.

3. Define the loading and boundary conditions: Next, specify the loading and border conditions for the study. This could entail imposing pressures, restrictions, or displacements on the model.

4. Once the model has been created, perform the study in DIANA software. This will produce data for the stone structure's contact pressures, stresses, and deformations.

It is essential to note that the precise factors and values for contact analysis will be determined by the masonry structure's application and geometry. Consult with experienced DIANA users or look for extra tools for assistance setting up contact analysis in DIANA software.