By Jay D. Humphrey, Sherry L. O'Rourke
This e-book covers the basics of biomechanics. themes contain bio solids, biofluids, tension, stability and equilibrium. scholars are inspired to contextualize rules and workouts inside a “big photo” of biomechanics. this can be an incredible ebook for undergraduate scholars with pursuits in biomedical engineering.
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Additional resources for An Introduction to Biomechanics: Solids and Fluids, Analysis and Design
It is important to be comfortable with the calculation of moments; hence, consider the following example. 7 Vector operations are reviewed in Appendix 7, if needed. 1 Prove that r Â F r⊥ Â F where r⊥ is the shortest distance between o and the line of action of F. Solution: For simplicity, let us consider the 2-D case. Referring to Fig. 10 let 0 0 0 0 e ⊥ and r ¼ r x^i þr y ^j ¼rx^i þr y ^j depending on which coordinate r⊥ ¼ d^ system is found to be most convenient. Likewise, the force vector can be written 0 0 0 0 0 as F ¼ Fx^i þF y ^j ¼Fx ^i þF y ^j .
According to the sliding ﬁlament model proposed in 1954, sarcomeres consist of overlapping thin (actin) and thick (myosin) ﬁlaments. 4. 7 Schema of the cross-bridge mechanism that is thought to control the contraction and relaxation of muscle. In particular, the cross-bridges allow a ratcheting motion between the thick myosin ﬁlaments and the thin actin ﬁlaments. Calcium plays a key role in this process. that attach, detach, and reattach in a ratcheting fashion with the actin, which thereby produces movement associated with the contraction of muscle (Fig.
8), the collagen molecule consists of three polypeptide α chains, each containing 1,300–1,700 amino acid residues. 18 1. 8 Schema of collagen at different levels of organization: from the triple-helix molecule consisting of three α-helices of repeating triplets of amino acids (G-X-Y), where G is glycine and X and Y are often proline or hydroxyproline, to an undulated ﬁber that could be found in arteries, cartilage, cornea, the heart, lungs, skin, tendons, and many other tissues. ]. The majority of these residues ($1,000–1,400) are organized into a central triple-helix motif (Ayad et al.