Objective. The mechanical properties of ribs from a large number ofpost-mortemhuman subjects (PMHS) were analyzed to search for variation according to age, sex or BMI in the sample. A large sample of specimens from different donors (N= 64) with a very wide range of ages and anthropometric characteristics was tested.Methods. Uniaxial tensile tests were used for a sample of coupons machined from cortical bone tissue in order to isolate the purely mechanical properties from the geometrically influenced properties of the rib. Each coupon is about 25 mm long and has a thickness of about 0.5 mm. The mechanical properties measured for each specimen/coupon include YM, yield stress, ultimate stress (maximum failure stress), ultimate strain, and resilience (energy to fracture of SED). The study provides new methodological improvements in DIC techniques.Results. This study is notable for using an atypically large sample of number of PMHS. The size of the sample allowed the authors to determine that age has a significant effect on failure stress (p< 0.0001), yield stress (p= 0.0047), ultimate strain (p< 0.0001) and resilience (p< 0.0001) [numbers in parentheses represent the correspondingp- values]. Finally, there is a combined effect, so that for a given age, an increase of BMI leads to a decrease of the maximum strain (i.e. cortical bone is less stiff when both age and BMI are higher).

中文翻译：

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人体解剖学变量对人肋骨皮质骨力学性能的影响。

客观的。分析了来自大量尸体检验对象（PMHS）的肋骨的机械性能，以根据样品中的年龄，性别或BMI来寻找变化。测试了一大批来自不同供体的标本样本（N = 64），这些标本具有很宽的年龄范围和人体测量学特征。为了从肋骨的几何影响特性中分离出纯机械性能，将单轴拉伸试验用于从皮质骨组织加工的试样块的样品。每个试样约25mm长，厚度约0.5mm。测量的每个样品/试样的机械性能包括YM，屈服应力，极限应力（最大破坏应力），极限应变和回弹力（SED的断裂能）。该研究为DIC技术提供了新的方法论改进。结果。这项研究因使用非典型的大量PMHS样本而引人注目。样本的大小使作者能够确定年龄对破坏应力（p <0.0001），屈服应力（p = 0.0047），极限应变（p <0.0001）和回弹力（p <0.0001）有显着影响。括号代表相应的p值]。最后，存在综合作用，因此对于给定的年龄，BMI的增加会导致最大应变的降低（即，当年龄和BMI都较高时，皮质骨的僵硬程度会降低）。0001）[括号中的数字代表相应的p值]。最后，存在综合作用，因此对于给定的年龄，BMI的增加会导致最大应变的降低（即，当年龄和BMI都较高时，皮质骨的僵硬程度会降低）。0001）[括号中的数字代表相应的p值]。最后，存在综合作用，因此对于给定的年龄，BMI的增加会导致最大应变的降低（即，当年龄和BMI都较高时，皮质骨的僵硬程度会降低）。