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Questions tagged [biomechanics]

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1answer
26 views

Typical IMU accelerations and angular velocities for lower limbs

Is there a dataset out there right now that shows the typical acceleration and angular velocity values for sensors attached to the thigh, shank, and feet for standard walking? Or literature/textbook ...
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1answer
43 views

Polarity of a relative angle - Knee joint angle

I'm wondering if it's correct to write: $$ \alpha = \theta_{lg} - \theta_{th} $$ EDIT: the theta angles are defined positive in counter-clock direcction, instead alpha in clockwise direction. My ...
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0answers
10 views

material model or force model?

I ran milling test (measuring forces and torques between the tool and the sample) on samples in order to characterize the material properties and define a material model to be implemented in a haptic-...
8
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1answer
627 views

What is the physical meaning of pulse rate and blood pressure, from a turbo machinery point of view?

Our hearts are peristaltic pumps, which has a periodic compression and expansion. The head developed can be taken as blood pressure. There are situation when the blood pressure is normal while the ...
0
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2answers
39 views

Need advice: Estimating the compressive yield strength of abdominal tissues from the data of its rigidity or stiffness constant

I am doing research on biomedical device development, and focusing on devices that work on grasping tissues in the abdominal area. I need some help with applying the concepts of material strength to ...
1
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2answers
68 views

Filtering Long-duration Signal

I have a long-duration EMG signal (~4 hours long) with a sampling frequency of 1 kHz. If I want to filter the data with a low-pass filter in 10 Hz in MATLAB, should I filter the signal with ...
1
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1answer
59 views

RULA upper arm angle

I want to perform a RULA based analysis on a set of participants and in order to calculate the RULA score I would need the upper arm(shoulder) angle. My question is would the upper arm angle be based ...
1
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0answers
88 views

Creating a “pinhole” small enough to allow only one molecule to pass through

Consider a "cartridge" of sorts. Is it possible to construct a "pinhole" in the cartridge such that only one molecule will pass through at a time? If so, what sort of equipment would I need to ...
1
vote
1answer
81 views

Number of layers in a laminated steel transplant, using Young's Modulus

I'm not sure if my calculations are correct for the above question. $$ E = \frac{\sigma}{\epsilon} = \frac{\frac{My}{I}}{\frac{\delta}{L}} = k. \frac{1}{I} $$ Where k is constant for both beams, ...
2
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1answer
178 views

How to measure calories actually burned from exercise?

I'm just an average person who questions the validity of my treadmill's claims about how many calories I've burned after an hour's worth of a cardio workout. How can I get a more accurate measurement ...
2
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3answers
313 views

Easily accessible material for maximum grip on a prosthetic hand?

Currently in the process of developing a 3d printed prosthetic hand and I am in need of advice on the type of rubber (or other material) we should use at the finger tips to give it more grip. The hand ...
3
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2answers
572 views

Suggestions for low friction surface materials for a “beltless static treadmill”

I'm currently developing a treadmill for clinic gait research. If I were to build a flat treadmill with no moving surfaces what materials or coatings would be worth exploring as walking surface. ...
5
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3answers
460 views

Center of Pressure Line from Barefoot Scan (EMED)

I have raw data obtained from EMED barefoot scan containing a matrix of pressure sensors over about 70 frames. This totals 70 matrices that record a snapshot of the pressure over the duration of a ...
4
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1answer
2k views

Convert Load Deformation (Extension) Data to Stress-Strain Curve

I am trying to manipulate some data that were obtained from a three point load experiment on a porcine tibia. I would like to obtain a stress-strain curve for the various specimens; however, the only ...
1
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1answer
568 views

What are the basic mechanism, components or parts to generate relative movements?

I'm an engineer in industrial design and despite that I studied mechanics, kinematics and dynamics, I got difficulties when I try to label or find components which could enable my designs have ...
-1
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1answer
301 views

Material with very small Young's modulus

I'm looking for a material with a Young's modulus of less than 100 Pa. I've looked at elastomers, but I haven't had any luck.
27
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10answers
6k views

How to quantify martial arts strikes?

Subtitled: Ah, strong am I with the Force, but how do I measure it? With all due apologies for paraphrasing Yoda, I am trying to measure a force. Fortunately, it's an easier force to measure than ...
3
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1answer
52 views

How is the long term reactivity of implant materials evaluated?

Various materials are implanted within the human body as a result of of medical need. Dental implants, stabilizing plates, arterial stents, and orthopedic replacements are all common examples where a ...
2
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1answer
88 views

Estimating maximum lift or strength

Weight lifters will use the term "one rep maximum" in order to refer to the maximum amount of weight that they can lift one time. The one rep max is often used as a proxy for how strong someone is (...