That Set PCDC Apart
Unified Cohesive Zone Model (UCZM)
PCDC introduces a innovative Unified Cohesive Zone Model (UCZM) for fracture and fragmentation simulation. Unlike traditional CZMs, UCZM dynamically inserts cohesive elements based on real-time material states (e.g., stress and strain), eliminating time-discontinuity problems ( Papoulia et al., 2003). The novel algorithm developed by Lei (2024) allows precise control of the transition from continuum to discontinuum, enabling any material model—elastic, plastic, or damage-based—to work seamlessly with discrete fracture mechanics.
统一内粘聚区模型（UCZM）
通过实时应力应变状态自动插入粘聚区（节理）单元，UCZM 避免了传统 CZM 的时间不连续性问题，支持任意材料模型（弹性、塑性、损伤等）无缝与离散破裂行为结合。
High-Precision Smooth Contact Algorithm
PCDC implements a GPU-optimized smooth contact model based on the potential distance method (Lei et al., 2020). This approach outperforms traditional contact algorithms in both accuracy and stability, especially in HFDEM modelling.
It accurately handles contact behaviors such as:
- Tensile separation
- Frictional sliding and dilation
- Residual strength and residual tension
By modeling contact forces using negative potential distances, PCDC achieves accurate simulation of contact mechanics in both static and dynamic regimes.
高精度平滑接触算法
基于距离势函数法，PCDC 提供稳定、高精度的接触力计算。支持含拉张、滑动、剪胀、残余摩擦和残余拉力等参数的复杂接触本构模型。
它可以准确地处理以下接触行为：
-拉伸分离
-摩擦滑动和膨胀
-残余强度和残余张力
通过使用负距离势函数法对接触力进行模拟，PCDC实现了静态和动态状态下接触力学的高精度模拟。
Multi-Physics Coupling for Realistic Simulation
PCDC is designed for fully coupled multi-physics simulations.
It explicitly simulates:
- Hydraulic-mechanical coupling
- Thermal-mechanical coupling
- Thermal-hydraulic-mechanical coupling
- Proppant transport in hydraulic fracturing
These capabilities make PCDC suitable for reservoir modeling, geothermal simulations, caving and backfilling, and complex mining processes with evolving thermal, fluid, and mechanical interactions.
多物理场耦合能力
PCDC 显式模拟以下耦合过程：
- 流-固耦合
- 热-固耦合
- 热-流-固三场耦合
- 支撑剂输运模拟
适用于油藏、水力压裂、地热、崩落与回填过程等建模。
User-Defined Constitutive Models — No Third-Party Tools Required
PCDC gives you full control to create your own:
- Constitutive models
- Contact and joint models
- Complex boundary condition behaviors
Thanks to its built-in open architecture, user-defined models can be developed and deployed without external tools, and executed as GPU-accelerated modules directly within the GUI. This enables advanced users and researchers to rapidly prototype and deploy novel models with full parallel performance.
无需第三方工具的自定义模型接口
用户可自行编写本构模型、接触模型、节理模型或复杂边界条件，直接在PCDC软件中以 GPU 加速方式运行，无需依赖外部软件。
