four-point bending test

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hallo,

 

for the validation of my model I tried to simulate a four-point bending test with a sandwich panel. The layers are modeled with MAT1-Material and the core with MAT9ORT. Somehow, the results are not matching to the one on the testing machine of the sandwich part, which I got from a data sheet. The displacement should be about 1,5mm, but I got 18mm. 

 

I attached my matieral card and a screenshot of the model. The engineering constants were provided from the supplier. They should be right because he sent me screenshots of his simulation, where he has a displacement of about 1mm.

 

 

<?xml version="1.0" encoding="UTF-8"?>Unbenannt.jpg

<?xml version="1.0" encoding="UTF-8"?>a.jpg

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017

    Hi Elvis,

     

    Can you cross check the unit system?

     

    Is the force applied is in Newtons or any other units?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017
    Altair Forum User said:

    Hi Elvis,

     

    Can you cross check the unit system?

     

    Is the force applied is in Newtons or any other units?

     

    Hey Prakash,

     

    yes the force is applied in Newtons (450N in total), the engineering constants in MPa. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017

    Hi Elvis,

     

    Is it possible to share the model file and data from the supplier?

     

    You can use the file transfer link in my signature below.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017
    Altair Forum User said:

    Hi Elvis,

     

    Is it possible to share the model file and data from the supplier?

     

    You can use the file transfer link in my signature below.

     

    Hey Prakash,

     

    I sent you the model file and the data sheets a few days ago. Did you check it already?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Hi Elvis,

     

    I didn't receive any file drop mail from you. Could you please share again?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017
    Altair Forum User said:

    Hi Elvis,

     

    I didn't receive any file drop mail from you. Could you please share again?

     

    Hey Prakash,

     

    I sent you the informations again.

     

    Thanks.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Hi Elvis,

     

    I ran the model on 2017.2 and as it is and the result is 0.9314units of displacement in Z direction.

     

    Which version of HW are you using?

    <?xml version="1.0" encoding="UTF-8"?>Elvis.PNG

Categories