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Hey Guys! I have experimental data for composite tension compression and bending (3-point and 4-point) due to my university and I want to make a material card that can describe all of the mentioned test (and behavior) with proper accuracy. I would like to make tension, compression and bending (3-point and 4-point) test in Optistruct but I haven't make coupon test before. In the real tests the loads (movement of the clamping jaws) move at constant velocity. I have no experiment how to model such kind of load in Optistruct. I think there should be some non-linearity in the test because of the large displacement. How should I properly model such kind of problem? Do you have any experiment in modeling with velocity load in Optistruct? A further problem will be the bending tests where I think I should use contact surface to model the geometry of the bending machine tool's head. In Optistruct I used slide contact before, but it didn't work to well because of large displacement. Is it possible the handle open gap contact and make the 3-point/4-point bending in Optistruct? If you have any model for bending and tension and compression could you share with me? I would like to study the pre-process method to understand the nature of the coupon test in Optistruct. Thank you for your help and advise in advance! Best regards, Tüki