Measurement of Mechanical Characteristics of Tibial Periosteum and Evaluation of Local Differences

1998 ◽  
Vol 120 (1) ◽  
pp. 85-91 ◽  
Author(s):  
E. Uchiyama ◽  
K. Yamakoshi ◽  
T. Sasaki
Keyword(s):  
Transverse Direction ◽  
Mechanical Characteristics ◽  
Soft Tissues ◽  
Experimental System ◽  
Longitudinal Direction ◽  
The Other ◽  
Connective Tissues ◽  
Stress Strain ◽  
Linear Region ◽  
Strain Pattern

Stress–strain relationships of bovine tibial periosteum, harvested from anterior, medial, lateral, and posterior aspects of tibia, were successfully measured using a newly developed experimental system. Results showed a curvilinear stress–strain pattern having three regions, i.e., toe, almost linear, and rupture regions, which resembled those of biological soft tissues like ligaments, skin, etc. Tensile moduli in the toe region (Ee) and in the linear region (Ec) were obtained by linear regressional analyses. These values and the tensile strength (σt) showed clear local differences. The values of Ee, Ec, and σt, in the longitudinal direction in the metaphyseal regions where ligaments or connective tissues attach were approximately two times larger than those in the diaphysis, where muscles or connective tissues attach. However, these properties in the metaphyseal and diaphyseal regions with muscle attachments were almost the same. In the transverse direction, these properties in the anterior proximal metaphysis were approximately two times larger than those in the diaphysis and in the distal metaphysis. In the other regions, these properties appeared not to be significantly different. These results clearly demonstrate that the mechanical properties of periosteum are strongly influenced by the ligament and muscle attachments.

Quality Assessment of Weldable Steel Mark P355NH from Decompression Chamber Construction for Diving

2012 ◽  
Vol 217-219 ◽  
pp. 2381-2387
Author(s):  
Doru Romulus Pascu ◽  
Radu Alexandru Roşu ◽  
Iuliana Duma ◽  
Horia Daşcău
Keyword(s):  
Test Temperature ◽  
Transverse Direction ◽  
Mechanical Characteristics ◽  
Longitudinal Direction ◽  
Pressure Vessels ◽  
Fine Grained ◽  
Weldable Steel ◽  
Breaking Energy ◽  
Fine Grained Steels ◽  
Selection Of

Non-alloyed P355NH steel according to EN 10028-3:2003 belongs to a group of fine-grained steels for pressure vessels being used in welded construction at decompression chamber for divers. Values of the chemical, structural and mechanical characteristics and steel toughness experimentally determined fit the analyzed steel in P355NH steel group according to EN 10028-3:2003. The toughness of the analyzed steel at the test temperature of -30°C is characterized by high values of fracture energy KV in longitudinal direction between 48 and 86 J and on transverse direction between 17 and 34J. Steel toughness at the test temperature of -30°C required by ABS standard (in Section 4/5.3 and Table 1) provides for breaking energy KV of min. 35J, with ductile fracture surfaces, value that is not respected at some lots of the three batches (A, B, C) of steel. Finally, based on the direct correlation established between HV10 hardness of the fine structure and the toughness it was made a selection of the lots of non-alloy steel P355NH which correspond to ABS norm for welded construction of the decompression chamber for divers

The Gravity Funnels, formed by the longitudinal vortices, according to the new Axioms and Laws

2021 ◽  
Vol 4 (1) ◽  
Keyword(s):  
Gravitational Waves ◽  
Scientific Theory ◽  
Transverse Direction ◽  
Modern Science ◽  
Longitudinal Direction ◽  
Space Time ◽  
The Other ◽  
Longitudinal Vortices ◽  
New Space ◽  
The One

In the age of information, it is no secret that the modern science is in a very difficult position. On the one hand, it has high hopes for solving the problems of modern humanity and very practical tasks. On the other hand, science shows limited potential and difficulty in carrying out the tasks. Beyond scientific theory remain such phenomena as gravity and gravitational waves and other unexplored and very useful phenomena. Obviously, the reason for these limited capabilities of modern science is its limited foundation. The foundation of science is determined by its basic axioms. If we expand the foundation of science, we will be able to build a more comprehensive, perfect and voluminous theory. In two monographs and a series of articles the author offers a system of extended axioms (with two new axioms) and a more extended theory (with eight new laws). To the great surprise of even the author, this new theory turned out to be extensive enough to cover and explain and the gravity. Moreover, the extended axioms and theory directly and naturally outlined the algorithm in the explanation of the so-called Gravity Funnels. According to the new axioms and laws, Gravity Funnels are both for suction (accelerating) and for expansion (decelerating). Expansion Gravity Funnel decelerates along its longitudinal direction as emits the matter in the transverse direction. In this way it consumes energy and generates matter. Suction Gravity Funnel accelerates along its longitudinal direction as sucks the matter in transverse direction. In this way it consumes matter and generates energy. The both of Funnels are situated in a new Space-time. The Space-time of decelerating and accelerating Funnels is packed by longitudinal vortices, in which the Space (S) is constant. It is radically different of the Space-Time where we live now. The Space-time where we live now is packed by cross vortices, where the time (T) is constant. According the new Axioms and Laws the two described Space- times are mutually orthogonal.

Effect of Field Irrigation on Tensile Behaviors of Disposable Drip Tapes Made from Virgin PE

2013 ◽  
Vol 357-360 ◽  
pp. 421-424 ◽  
Author(s):  
Shou Jun Wu ◽  
Zhi Hua Zhang ◽  
De Lan Zhu
Keyword(s):  
Tensile Stress ◽  
Transverse Direction ◽  
Acute Stress ◽  
Longitudinal Direction ◽  
Stress Strain ◽  
Transverse Tensile ◽  
Large Elongation ◽  
Stress Drops ◽  
Work Effect

In the present work, effect of field irrigation on tensile behaviors of disposable drip tape made from virgin PE is studied. Results show that after 5 months (from Novomber, 2012 to next April, 2013) field irrigation tests, there are no intrinsically changes in tensile stress-strain behaviors for the disposable drip tape made from virgin PE along the longitudinal direction. Tensile stress-strain behaviors for the disposable drip tape made from virgin PE along transverse direction is different. After field irrigation tests, the tapes are prone to sudden rupture at the seams accompanied with a relative smaller elongation and acute stress drops while those as-received show large elongation with gradual stress decrease under transverse tensile. However, rebound of the stretched tapes after field irrigation tests is distinctly smaller than those of as-received samples.

AISI 1141

Alloy Digest ◽  
1983 ◽  
Vol 32 (3) ◽  
Keyword(s):  
Carbon Steel ◽  
Transverse Direction ◽  
Longitudinal Direction ◽  
Heat Treating ◽  
Automatic Machine ◽  
Steel Mills ◽  
Light Duty ◽  
High Production ◽  
Ball Joints ◽  
Machining Characteristics

Abstract AISI 1141 is a resulfurized carbon steel containing nominally 1.50% manganese and 0.08-0.13% sulfur to give it free-machining characteristics. It has relatively low hardenability. Its ductility and toughness are fairly good in the longitudinal direction but tend to be low in the transverse direction. It is highly recommended for high-production automatic-machine products. Among its many uses are screws, bolts, ball joints, spindles and light-duty gears. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-93. Producer or source: Carbon steel mills.

A Yield Criterion of Porous Materials With Anisotropy Caused by Geometry or Distribution of Pores

1991 ◽  
Vol 113 (4) ◽  
pp. 425-429 ◽  
Author(s):  
T. Hisatsune ◽  
T. Tabata ◽  
S. Masaki
Keyword(s):  
Velocity Field ◽  
Porous Materials ◽  
Upper Bound ◽  
Volume Fraction ◽  
Yield Criterion ◽  
Longitudinal Direction ◽  
Axisymmetric Deformation ◽  
The Other ◽  
The Matrix ◽  
Spherical Cells

Axisymmetric deformation of anisotropic porous materials caused by geometry of pores or by distribution of pores is analyzed. Two models of the materials are proposed: one consists of spherical cells each of which has a concentric ellipsoidal pore; and the other consists of ellipsoidal cells each of which has a concentric spherical pore. The velocity field in the matrix is assumed and the upper bound approach is attempted. Yield criteria are expressed as ellipses on the σm σ3 plane which are longer in longitudinal direction with increasing anisotropy and smaller with increasing volume fraction of the pore. Furthermore, the axes rotate about the origin at an angle α from the σm-axis, while the axis for isotropic porous materials is on the σm-axis.

Effect of Specimen Geometry on the Predicted Mechanical Behavior of Polyethylene Pipe Material

2014 ◽  
Author(s):  
Tarek M. A. A. El-Bagory ◽  
Tawfeeq A. R. Alkanhal ◽  
Maher Y. A. Younan
Keyword(s):  
Mechanical Behavior ◽  
Longitudinal Direction ◽  
Primary Objective ◽  
The Other ◽  
Pipe Material ◽  
Ring Specimen ◽  
Design Data ◽  
Practical Applications ◽  
Other Hand ◽  
Gauge Section

The primary objective of the present paper is to depict the mechanical behavior of high density polyethylene, (HDPE), pipes under different loading conditions with different specimen geometries to provide the designer with reliable design data relevant to practical applications. Therefore, it is necessary to study the effect of strain rate, ring configuration, and grip or fixture type on the mechanical behavior of dumb-bell-shaped, (DBS), and ring specimens made from HDPE pipe material. DBS and ring specimens are cut from the pipe in longitudinally, and circumferential (transverse) direction respectively. On the other hand, the ring specimen configuration is classified into two types; full ring, (FR), and notched ring, (NR) (equal double notch from two sides of notched ring specimen) specimens according to ASTM D 2290-12 standard. Tensile tests are conducted on specimens cut out from the pipe with thickness 10 mm at different crosshead speeds (10–1000 mm/min), and ambient temperature, Ta = 20 °C to investigate the mechanical properties of DBS, and ring specimens. In the case of test specimens taken from longitudinal direction from the pipe a necking phenomenon before failure appears at different locations along the gauge section. On the other hand, the fracture of NR specimens occurs at one notched side. The results demonstrated that the NR specimen has higher yield stress than DBS, and FR specimens at all crosshead speeds. The present experimental work reveals that the crosshead speed has a significant effect on the mechanical behavior of both DBS, and ring specimens. The fixture type plays an important role in the mechanical behavior for both FR and NR specimens at all crosshead speeds.

Histologic Findings in Two Very Small Intracanalicular Solitary Schwannomas of the Eighth Nerve

1986 ◽  
Vol 95 (5) ◽  
pp. 460-465 ◽  
Author(s):  
J. Gail Neely ◽  
Jack Hough
Keyword(s):  
Nerve Fiber ◽  
Longitudinal Direction ◽  
Nerve Fibers ◽  
Vestibular Nerve ◽  
Cochlear Nerve ◽  
The Other ◽  
En Bloc ◽  
Hearing Conservation ◽  
Eighth Nerve ◽  
Conservation Surgery

Two very small intracanalicular tumors, resected en bloc with the complete eighth nerve, were serially sectioned in order to study the relationship between the tumors and the nerves of origin. Both cases met the size criteria for hearing conservation surgery; however, the patient with the smaller tumor and the better hearing had no recognizable cochlear nerve fibers passing the tumor. The cochlear nerve in the patient with poorer hearing was completely free of tumor. The tumor with the infiltrated cochlear nerve seemed to originate from the inferior vestibular nerve. The other tumor seemed to arise from the superior vestibular nerve. Proximally, the tumors occupied a more central location in the involved nerves, but they abruptly became eccentric and exophytic as they proceeded laterally. Nerve fibers remaining about the tumors were displaced to the periphery. These nerve fiber aggregates became quite thin and attenuated, frequently separating into smaller aggregates which, ultimately, were incorporated into the tumors. As fibers came closer to the tumors, they tended to change from their longitudinal direction toward a more circumferential orientation about the surface of the tumors. The tumor-nerve fiber interfaces were quite variable throughout the course of the tumor, ranging from large aggregates of nerve fibers distinctly separate from the tumors to aggregates separate but tightly applied to the tumors without a tissue plane between, to aggregates partially incorporated within the periphery of the tumors, to aggregates completely incorporated into the periphery of the tumors. Frequently several types of interfaces were seen in the same section. These findings showed that in one case the cochlear nerve could have been surgically separated from the acoustic tumor; in the other specimen, it could not have been separated. It was impossible to predict between the two. In these two very small tumors, the gross specimen observation correlated reasonably well with the histology, thus suggesting that intraoperative observation may be a predictor in hearing conservation surgery; however, previous studies in slightly larger tumors make this an extremely guarded concept.

scholarly journals A CLINICAL CASE OF REMOVING A RESIDUAL FOREIGN BODY FROM THE LEFT SUPRACLAVICULAR REGION

2017 ◽  
Vol 4 (3) ◽  
pp. 120-122
Author(s):  
V.V. Boyko ◽  
V.V. Makarov ◽  
A.L. Sochnieva ◽  
V.V. Kritsak
Keyword(s):  
Surgical Treatment ◽  
Foreign Body ◽  
Soft Tissue ◽  
Clinical Case ◽  
Foreign Bodies ◽  
Soft Tissues ◽  
Life Quality ◽  
The Other ◽  
Practical Case ◽  
The One

Boyko V.V., Makarov V.V., Sochnieva A.L., Kritsak V.V.Residual foreign bodies in soft tissues are one of the main causes of chronical infection lesions and decrease in life quality. Surgical treatment is the most common way to relieve the patient from a foreign body. Often there is a question whether to remove a foreign body? On the one hand, all foreign bodies that are in the human body must be removed. On the other hand, in the absence of symptoms, the risk of surgery performed for the purpose of removal exceeds the risk associated with finding the foreign body. We would like to describe a practical case of removing a foreign body (Kirschner`s wires) from the left supraclavicular region. The young patient lived with a fragment of Kirschner's wire left after the osteosynthesis of the fractured clavicle for 5 years. Surgery to remove the residual foreign body was successful. On the 7th postoperative day the patient was discharged from the hospital under the supervision of surgeons at the place of residence.Key words: foreign body in soft tissue, Kirschner`s wire, surgical treatment. КЛІНІЧНИЙ ВИПАДОК ВИДАЛЕННЯ ЗАЛИШКОВ СТОРОННЬОГО ТІЛА З ЛІВОЇ НАДКЛЮЧИЧНОЇ ОБЛАСТІБойко В.В., Макаров В.В., Сочнева А.Л.,  Крицак В.В.Залишкові чужорідні тіла м'яких тканин залишаються однією з основних причин виникнення вогнища хронічної інфекції та зниження рівня якості життя. Хірургічне лікування основний спосіб позбавити хворого від наявності чужорідного агента. Часто виникає питання чи видаляти чужорідне тіло. З одного боку, усі сторонні тіла, що знаходяться в тілі людини, підлягають видаленню, з іншого боку при відсутності симптомів ризик операції, проводимої з метою видалення, перевищує ризик, пов'язаний з перебуванням чужорідного тіла. Ми хотіли б поділитися випадком видалення залишкового стороннього тіла (спиці Кіршнера) лівої надключичної ділянки із власної практики. Молода пацієнтка прожила з уламком спиці Кіршнера, залишеної після металлоостеосинтезу поламаної ключиці протягом 5 років. Операція з видалення залишкового стороннього тіла пройшла успішно. На 7 післяопераційну добу пацієнтка була виписана зі стаціонару під спостереження хірурги за місцем проживання.Ключові слова: чужорідне тіло м'яких тканин, спиця Кіршнера, хірургічне лікування. кЛИНИЧЕСКИЙ СЛУЧАЙ УДАЛЕНИЯ ОСТАТКОВ ИНОРОДНОГО ТЕЛА ИЗ ЛЕВОЙ ПОДКЛЮЧИЧНОЙ ОБЛАСТИ Бойко В.В., Макаров В.В., Сочнева А.Л.,  Крицак В.В.Остаточные инородные тела мягких тканей остаются одной из основных причин возникновения очага хронической инфекции и снижения уровня качества жизни. Хирургическое лечение основной способ избавить больного от наличия чужеродного агента. Часто возникает вопрос удалять ли инородное тело? С одной стороны, все инородные тела, находящиеся в теле человека, подлежат удалению, с другой стороны при отсутствии симптомов риск операции, производимой с целью удаления, превышает риск, связанный с нахождением инородного тела. Мы хотели бы поделится случаем удаления остаточного инородного тела (спицы Киршнера) левой надключичной области из собственной практики. Молодая пациентка прожила с обломком спицы Киршнера, оставленной после металлоостеосинтеза поломанной ключицы в течении 5 лет. Операция по удалению остаточного инородного тела прошла успешно. На 7 послеоперационные сутки пациентка была выписана из стационара под наблюдение хирурги по месту жительства.Ключевые слова: инородное тело мягких тканей, спица Киршнера, оперативное лечение.

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