Questions tagged [impact]

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how to write linear viscoelastic impact model code in opensees?

I want to modeling pounding phenomenon between adjacent buildings in OpenSees software. For impact models ( between the structures ) i want to use linear viscoelastic model but I do not know how to ...
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2answers
34 views

Why do some metals with bcc structure show ductile-brittle transition in charpy impact test?

I was learning about the charpy impact test and came across the graph on this webiste that shows the impact energy for bcc and fcc structures as a function of temperature. I tried searching for an ...
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1answer
35 views

How to create a mechanical equivalent to dropping object onto steel floor

(I was informed on the Physics board that this is an Engineering question, therefore they closed it there, and I moved it here) First, I have next to zero formal physics training... I opted for all ...
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0answers
12 views

Half Sine Impulse in a modal Transient Analysis

I have a MDOF FEM model in which I perform a modal transient analysis based on the modal eigenfrequencies extracted in a prior step. I wish to excite only the first natural frequency of the system via ...
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2answers
54 views

Is a single large impact better than several small impacts for breaking ice

I'm designing a device that uses impact to remove ice from sidewalks. I have a question about how to best design the impact mechanism. I can design it to deliver several light impacts or fewer harder ...
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1answer
43 views

Does the surface roughness play any role in shock absorbing?

Consider a mass of about $130 \pm 10 $ kg, falls from height, let say $2.5 $ m. In order to dampen the vibration and sound, I use silencer or drop pads. I was wondering if introducing the macroscopic ...