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Deformation of Member under Multiple Loadings

Deformation of Member under Multiple Loadings

When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...

Temperature Dependent Deformation

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When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
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Related Experiment Video

Updated: Sep 16, 2025

Quantification of Strain in a Porcine Model of Skin Expansion Using Multi-View Stereo and Isogeometric Kinematics

Quantification of Strain in a Porcine Model of Skin Expansion Using Multi-View Stereo and Isogeometric Kinematics

Published on: April 16, 2017

GPU-accelerated deformation mapping in hybrid organ models for real-time simulation.

Rintaro Miyazaki¹, Yuichiro Hayashi², Masahiro Oda^2,3

¹Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan. rmiyazaki@mori.m.is.nagoya-u.ac.jp.

International Journal of Computer Assisted Radiology and Surgery

|July 7, 2025

Summary

This study introduces a GPU-accelerated method for surgical simulation, significantly speeding up the mapping of soft tissue deformation in high-resolution organ models. This enhances real-time performance for medical training.

Keywords:

Deformation GPU Octree Surgical simulation Vertex shader

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Last Updated: Sep 16, 2025

Quantification of Strain in a Porcine Model of Skin Expansion Using Multi-View Stereo and Isogeometric Kinematics

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Published on: April 16, 2017

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Reconstituting Cytoarchitecture and Function of Human Epithelial Tissues on an Open-Top Organ-Chip

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Published on: February 17, 2023

Area of Science:

Medical Simulation
Computer Graphics
Computational Anatomy

Background:

Surgical simulation requires real-time soft tissue deformation for effective training.
Current methods using multiple resolutions or adaptive mesh refinement face processing delays in mapping deformation data.

Purpose of the Study:

To develop and evaluate a GPU-accelerated method for mapping soft tissue deformation in surgical simulations.
To address the computational bottleneck in real-time organ model deformation.

Main Methods:

A hierarchical octree cube structure was generated from high-resolution organ models.
Vertex coordinates were calculated using trilinear interpolation within the octree structure.
A vertex shader program processed organ model vertices in the GPU rendering pipeline for acceleration.

Main Results:

GPU-based processing time remained nearly constant with increasing model vertices, unlike CPU-based methods.
GPU performance showed linear scaling with the number of surface cubes.
Conditions were identified where GPU implementation significantly outperforms CPU-based approaches.

Conclusions:

The implemented octree cube deformation mapping using vertex shaders effectively accelerates the process.
GPU acceleration is beneficial for high-resolution organ models with numerous vertices in surgical simulations.