scholarly journals A Review on Damage and Rupture Modelling for Soft Tissues

2022 ◽  
Vol 9 (1) ◽  
pp. 26
Author(s):  
Sai Naga Sri Harsha Chittajallu ◽  
Ashutosh Richhariya ◽  
Kwong Ming Tse ◽  
Viswanath Chinthapenta

Computational modelling of damage and rupture of non-connective and connective soft tissues due to pathological and supra-physiological mechanisms is vital in the fundamental understanding of failures. Recent advancements in soft tissue damage models play an essential role in developing artificial tissues, medical devices/implants, and surgical intervention practices. The current article reviews the recently developed damage models and rupture models that considered the microstructure of the tissues. Earlier review works presented damage and rupture separately, wherein this work reviews both damage and rupture in soft tissues. Wherein the present article provides a detailed review of various models on the damage evolution and tear in soft tissues focusing on key conceptual ideas, advantages, limitations, and challenges. Some key challenges of damage and rupture models are outlined in the article, which helps extend the present damage and rupture models to various soft tissues.

2011 ◽  
Vol 21 (5) ◽  
pp. 713-754 ◽  
Author(s):  
M. S. Niazi ◽  
H. H. Wisselink ◽  
T. Meinders ◽  
J. Huétink

The Lemaitre's continuum damage model is well known in the field of damage mechanics. The anisotropic damage model given by Lemaitre is relatively simple, applicable to nonproportional loads and uses only four damage parameters. The hypothesis of strain equivalence is used to map the effective stress to the nominal stress. Both the isotropic and anisotropic damage models from Lemaitre are implemented in an in-house implicit finite element code. The damage model is coupled with an elasto-plastic material model using anisotropic plasticity (Hill-48 yield criterion) and strain-rate dependent isotropic hardening. The Lemaitre continuum damage model is based on the small strain assumption; therefore, the model is implemented in an incremental co-rotational framework to make it applicable for large strains. The damage dissipation potential was slightly adapted to incorporate a different damage evolution behavior under compression and tension. A tensile test and a low-cycle fatigue test were used to determine the damage parameters. The damage evolution was modified to incorporate strain rate sensitivity by making two of the damage parameters a function of strain rate. The model is applied to predict failure in a cross-die deep drawing process, which is well known for having a wide variety of strains and strain path changes. The failure predictions obtained from the anisotropic damage models are in good agreement with the experimental results, whereas the predictions obtained from the isotropic damage model are slightly conservative. The anisotropic damage model predicts the crack direction more accurately compared to the predictions based on principal stress directions using the isotropic damage model. The set of damage parameters, determined in a uniaxial condition, gives a good failure prediction under other triaxiality conditions.


2020 ◽  
pp. 105678952094856
Author(s):  
A Mattiello ◽  
R Desmorat

The lode angle dependency introduced by anisotropic damage evolution laws is analyzed in detail for initially isotropic materials. Many rupture criteria are obtained, under the proportional loading assumption, by the time integration of different anisotropic damage evolution laws [Formula: see text] among the three existing families: strain governed, stress governed and plastic strain governed. The cross-analysis of path independent rupture criteria and of anisotropic damage evolution laws finally allows us to improve the Lode angle dependency of (fully coupled) anisotropic damage models.


2013 ◽  
Vol 4 (4) ◽  
pp. 18-22
Author(s):  
Natalia Anatolievna Barhatova

In article include results of analyses specials clinical and laboratories manifestations the local and general forms of infection on the soft tissues at the children in different age. Were revealed the most significant factors of risk development general form of infection in the children´s age. Also were determined clinical specials of systemic inflammatory response syndrome in dependent of the character inflammatory reaction of soft tissues, time of hospitalization and time of surgical intervention. Were revealed the most typical combinations symptoms of systemic inflammatory response syndrome on the child in different age. It´s allow improve early clinical diagnostic of sepsis on the child and shorten time of start equivalent therapy of general forms of infection.


2007 ◽  
Vol 44 (18-19) ◽  
pp. 5894-5911 ◽  
Author(s):  
V. Alastrué ◽  
J.F. Rodríguez ◽  
B. Calvo ◽  
M. Doblaré

2016 ◽  
Vol 30 (3) ◽  
pp. 451-460
Author(s):  
Amol Raheja ◽  
Guru Dutta Satyarthee

AbstractChronic subdural hematoma (CSDH) is common squeal of trauma and rarely associated with anticoagulant therapy, antiplatelet, chemotherapeutic drugs, arteriovenous malformation, aneurysms and post-craniotomy. However its occurrence is very unusual with systemic haematological malignancy and mostly reported with acute myeloid leukemia; however incidence of SDH occurrence in chronic myelogenous leukemia (CML) is very rare. CML is a haematological malignancy characterized by chromosomal alteration, pathologically represents increased proliferation of the granulocytic cell line without loss of capacity to differentiate. CML has three phases - remission phase, accelerated phase and blast crisis. About 85 % of patients present in remission phase of disease and carries a favorable prognosis. As intracranial, subdural hematoma usually occur in the accelerated phase or blast crisis phase or extremely uncommon during chronic remission phase, although only those affected, who are neglecting therapeutic medication or discontinued therapy or rarely as an adverse effect of medications. However, important role of neurosurgeon lies in early detection and correction of platelet count and associated hematological abnormality as quite sizeable proportion of cases may not need surgical intervention instead can be managed conservatively under regular supervision in association with oncologist colleague, but few cases may need urgent surgical intervention. So, selecting a subgroup of CML cases in the remission phase requiring surgical intervention, presenting with CSDH is not only challenging, as failure to make an informed and timely precise decision can lead to catastrophic worse outcome and even mortality. So, purpose of current article is to formulate the management therapeutic plan. Authors report three cases of CML in chronic remission phase, receiving treatment under guidance of Haemto-oncologist at our institute presented with spontaneous chronic SDH. The mean age was 36 years (range 29- 44 years), 66% were male, headache was presenting feature in all 100% (n=3), 66% cases were hemiplegic and 33% unconscious each, in 66% cases CSDH were located on right fronto-temporal region and 33% had small left sided thin CSDH. About were 66% cases (n=2) were managed surgically by burr hole placement and drainage drain placement while 33% case (n=1), who had thin CSDH was managed conservatively.Favorable outcome was observed in 100% cases (n=3) Outcome was favorable in all of our cases.


Author(s):  
Amit S. Date ◽  
Amrapali Keny Pawar ◽  
Pooja Kamath ◽  
Treville Pereira

<p class="abstract">Partial hemifacial hyperplasia is a rare congenital malformation characterized by prominent unilateral overdevelopment of some of the hard and soft tissues of the face. This uncommon diagnosis should be considered while examining facial asymmetry. We report a case of slowly enlarging right facial swelling which turned out to be enlarged zygomtic arch. Complete evaluation led us to believe continued condylar hyperactivity as the underlying reason for worsening deformity. We offer an explanation for the same. Minimal surgical intervention led to significant aesthetic improvement which was patients main concern.</p>


Author(s):  
A. S. Skaliukh ◽  
P. A. Oganesyan ◽  
A. A. Solovieva ◽  
T. E. Gerasimenko

The main goal of the present work is mathematical and finite element modeling of component dynamic oscillatory systems, including piezoceramic elements, elastic elements and external influences from soft tissues that describe the operation of ultrasonic medical devices, as applied to instruments and medical devices for finding the most effective forms and modes of operation. Elastic and piezoceramic solids are modeled within the linear theory of elasticity and electroelasticity, and soft tissues are acoustically medium with certain viscosity coefficients. As a research tool used CAE package ACELAN, which builds three-dimensional and axisymmetric models of the device. In numerical experiments, a modal and harmonic analysis is performed, on the basis of which the most effective operating frequencies are identified.


Author(s):  
R. Feneck ◽  
F. Guarracino

Perioperative echocardiography is one of the fastest growing areas of echocardiography. Although transthoracic imaging has a role, intraoperative imaging is mostly undertaken using transoesophageal echocardiography (TOE).The indications for perioperative echo have recently been re-evaluated, resulting in recognition of the ubiquitous benefit in patients undergoing cardiac surgery, and recognition of the value in non-cardiac surgery and critical care also.Although TOE is safe, it should be remembered that there may be a greater risk of traumatic damage to the soft tissues in anaesthetized patients who cannot complain of pain during probe insertion.Perioperative imaging should be used to confirm and refine the preoperative diagnosis, detect new or unsuspected pathology, adjust the anaesthetic and surgical plan, and assess the results of surgical intervention. Using imaging to optimize myocardial function is a constantly developing technique, and one which may ensure that patients leave the operating room in the best possible condition. The use of perioperative echo in some procedures, for example, in mitral repair, is now regarded as so valuable that it is arguable that perioperative TOE should be mandatory in these cases.


Author(s):  
Tomoyuki Kato ◽  
Koji Abe ◽  
Kazuki Sato ◽  
Toshiyasu Nakamura

Abstract Background Isolated ulnar head fracture is a rare entity, and the restriction of range of motion in the wrist is rarely reported. Case Description We report two cases of conservatively treated ulnar head malunion with restricted supination and pronation. The increased tension of the volar portion of the triangular fibrocartilage complex was observed, and the surgical treatment significantly improved the range of motion. Literature Review There are a few reports on isolated ulnar head fracture. Other causes of restricted supination and pronation of the wrist are mostly due to the interposition of soft tissues or loose bodies. Clinical Relevance Malunion after ulnar head fracture can cause restriction of wrist supination and pronation. Surgical intervention may be considered if restricted range of motion remains after conservative treatment.


2018 ◽  
Vol 08 (01) ◽  
pp. e128-e137
Author(s):  
Christina Lampe ◽  
Christian Lampe

AbstractMucopolysaccharidoses (MPSs) are multisystemic, chronic progressive, heterogeneous, and life-threatening diseases, involving severely the musculoskeletal system, in particular in MPS I, II, IV, VI, VII, and less prevalent in MPS III. Accumulation of glycosaminoglycans (GAGs) in soft tissues, such as ligaments, tendons, and joint capsules, as well as in cartilage, and bone lead to orthopedic complications: joint stiffness, contractures, and skeletal deformities, resulting in hip dysplasia, genua valga, feet deformities, kyphoscoliosis, narrowing of the spinal canal, atlantoaxial instability, carpal tunnel syndrome, trigger finger, and growth retardation. These complications significantly reduce the quality of life due to impaired mobility, loss of independency, and pain. Compression of the cervical spinal cord is also life threatening. According to the progressive nature of MPSs, musculoskeletal symptoms worsen over time and surgical intervention may be inevitable. However, due to the increased anesthesia risk of MPSs, surgical intervention has to be evaluated carefully by a multidisciplinary team. Additionally, due to the rarity of the diseases, not many standards or recommendations are available to determine the indication of a surgical intervention, so each intervention must be decided individually, based on the few data available. In addition, conservative treatment should be taken into consideration. Physiotherapy, pain medication, insoles, orthosis, braces, corsets, and special footwear play a pivotal role. Unfortunately, the skeletal tissues are poorly vascularized and enzyme replacement therapy does not have much effect on them. It is important to detect and observe musculoskeletal complications in the regular follow-up visits, in particular the life-threatening compression of the cervical spinal cord.


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