A three-nested-deformation model is proposed to describe crack-tip fields in rubber-like materials with large deformation. The model is inspired by the distribution of the measured in-plane and out-of-plane deformatio...A three-nested-deformation model is proposed to describe crack-tip fields in rubber-like materials with large deformation. The model is inspired by the distribution of the measured in-plane and out-of-plane deformation. The in- plane displacement of crack-tip fields under both Mode 1 and mixed-mode （Mode I-II） fracture conditions is measured by using the digital Moir6 method. The deformation character- istics and experimental sector division mode are investigated by comparing the measured displacement fields under differ- ent fracture modes. The out-of-plane displacement field near the crack tip is measured using the three-dimensional digital speckle correlation method.展开更多
Background Fibrodysplasia ossificans progressiva(FOP)is a rare and disabling heritable connective tissue disease that is difficult to treat.This study seeks to explore the clinical characteristics,clinical manifestati...Background Fibrodysplasia ossificans progressiva(FOP)is a rare and disabling heritable connective tissue disease that is difficult to treat.This study seeks to explore the clinical characteristics,clinical manifestations,treatment and prognosis of FOP to provide a clinical basis for its early diagnosis and treatment.Methods Twenty-six children with FOP were retrospectively analyzed in terms of their onset,clinical manifestations,auxiliary examinations and treatment.Results Among the 26 cases,the youngest age of manifestation of mass was 8 days after birth,and the average age was 3 years and 2 months.The peak age was 2-5 years old.Inflammatory mass and toe-finger deformity are the main early clinical manifestations of the disease.These inflammatory masses often lead to hard osteogenic deposits that initially mainly involve the central axis,such as the neck(22/26,84.6%),back(20/26,76.9%),and head(13/26,50%).Toe-finger deformity mainly manifests as symmetrical great toe deformity,or short and deformed thumb and little finger.The diagnosis of FOP requires typical clinical manifestations or ACVR1 gene detection.The main therapeutic drugs for FOP include glucocorticoids and non-steroidal anti-inflammatory drugs.Although not compliant with the recommended medical management of FOP,in our clinical practice children with uncontrollable illness could be treated using a variety of immunosuppressive agents in combination.Conclusions FOP is a rare autosomal dominant heritable disease.The main clinical manifestations observed in this study were recurrent inflammatory mass and toe-finger deformity.If the diagnosis and treatment are not performed in a timely manner,serious complications are likely to affect the prognosis.Therefore,early diagnosis and active treatment should be performed.展开更多
基金supported by the National Natural Science Foundation of China (10732080 and 11102134)
文摘A three-nested-deformation model is proposed to describe crack-tip fields in rubber-like materials with large deformation. The model is inspired by the distribution of the measured in-plane and out-of-plane deformation. The in- plane displacement of crack-tip fields under both Mode 1 and mixed-mode （Mode I-II） fracture conditions is measured by using the digital Moir6 method. The deformation character- istics and experimental sector division mode are investigated by comparing the measured displacement fields under differ- ent fracture modes. The out-of-plane displacement field near the crack tip is measured using the three-dimensional digital speckle correlation method.
文摘Background Fibrodysplasia ossificans progressiva(FOP)is a rare and disabling heritable connective tissue disease that is difficult to treat.This study seeks to explore the clinical characteristics,clinical manifestations,treatment and prognosis of FOP to provide a clinical basis for its early diagnosis and treatment.Methods Twenty-six children with FOP were retrospectively analyzed in terms of their onset,clinical manifestations,auxiliary examinations and treatment.Results Among the 26 cases,the youngest age of manifestation of mass was 8 days after birth,and the average age was 3 years and 2 months.The peak age was 2-5 years old.Inflammatory mass and toe-finger deformity are the main early clinical manifestations of the disease.These inflammatory masses often lead to hard osteogenic deposits that initially mainly involve the central axis,such as the neck(22/26,84.6%),back(20/26,76.9%),and head(13/26,50%).Toe-finger deformity mainly manifests as symmetrical great toe deformity,or short and deformed thumb and little finger.The diagnosis of FOP requires typical clinical manifestations or ACVR1 gene detection.The main therapeutic drugs for FOP include glucocorticoids and non-steroidal anti-inflammatory drugs.Although not compliant with the recommended medical management of FOP,in our clinical practice children with uncontrollable illness could be treated using a variety of immunosuppressive agents in combination.Conclusions FOP is a rare autosomal dominant heritable disease.The main clinical manifestations observed in this study were recurrent inflammatory mass and toe-finger deformity.If the diagnosis and treatment are not performed in a timely manner,serious complications are likely to affect the prognosis.Therefore,early diagnosis and active treatment should be performed.
