Modeling Modulus Reduction in Bovine Trabecular Bone Damaged in Compression
Author:
Moore T. L. Arthur1, Gibson L. J.2
Affiliation:
1. Division of Health Sciences and Technology, Harvard Medical School–Massachusetts Institute of Technology, Cambridge, MA 02139; Orthopedic Biomechanics Laboratory, Beth Israel Deaconess Medical Center, Boston, MA 02215 2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
Abstract
Loading bone beyond its yield point creates microdamage, leading to reduction in stiffness. Previously, we related microdamage accumulation to changes in mechanical properties. Here, we develop a model that predicts stiffness loss based on the presence of microdamage. Modeling is done at three levels: (1) a single trabecula, (2) a cellular solid consisting of intact, damaged, and fractured trabeculae, and (3) a specimen with a localized damage band. Predictions of a reduced modulus agree well with experimental measured modulus reductions of post-yield compression of bovine trabecular bone. The predicted reduced modulus is relatively insensitive to changes in the input parameters.
Publisher
ASME International
Subject
Physiology (medical),Biomedical Engineering
Reference39 articles.
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