Chaste Commit::ca8ccdedf819b6e02855bc0e8e6f50bdecbc5208
PolynomialMaterialLaw3d.cpp
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34*/
35
36#include "PolynomialMaterialLaw3d.hpp"
37
38double PolynomialMaterialLaw3d::Get_dW_dI1(double I1, double I2)
39{
40 double ret = 0.0;
41 // notes: use ints not unsigned as doing p-1
42 // (except indexing from p=1 because multiplying by p, but
43 // still safer to use ints)
44 for (int p=1; p<=(int)mN; p++)
45 {
46 for (int q=0; q<=(int)mN-p; q++)
47 {
48 ret += mAlpha[p][q] * p * pow(I1-3,p-1) * pow(I2-3,q);
49 }
50 }
51
52 return ret;
53}
54
55double PolynomialMaterialLaw3d::Get_dW_dI2(double I1, double I2)
56{
57 double ret = 0.0;
58 // notes: use ints not unsigned as doing q-1
59 // (except indexing from q=1 because multiplying by q, but
60 // still safer to use ints)
61 for (int p=0; p<=(int)mN; p++)
62 {
63 for (int q=1; q<=(int)mN-p; q++)
64 {
65 ret += mAlpha[p][q] * q * pow(I1-3,p) * pow(I2-3,q-1);
66 }
67 }
68 return ret;
69}
70
71double PolynomialMaterialLaw3d::Get_d2W_dI1(double I1, double I2)
72{
73 double ret = 0.0;
74
75 // notes: use ints not unsigned as doing p-1
76 // (except indexing from p=2 because multiplying by p(p-1), but
77 // still safer to use ints)
78 for (int p=2; p<=(int)mN; p++)
79 {
80 for (int q=0; q<=(int)mN-p; q++)
81 {
82 ret += mAlpha[p][q] * p * (p-1) * pow(I1-3,(p-1)*(p-2)) * pow((double)I2-3,(double)q);
83 }
84 }
85 return ret;
86}
87
88double PolynomialMaterialLaw3d::Get_d2W_dI2(double I1, double I2)
89{
90 double ret = 0.0;
91
92 // notes: use ints not unsigned as doing q-1
93 // (except indexing from q=2 because multiplying by q(q-1), but
94 // still safer to use ints)
95 for (int p=0; p<=(int)mN; p++)
96 {
97 for (int q=2; q<=(int)mN-p; q++)
98 {
99 ret += mAlpha[p][q] * q * (q-1) * pow((double)I1-3,(double)p) * pow(I2-3,(q-1)*(q-2));
100 }
101 }
102 return ret;
103}
104
105double PolynomialMaterialLaw3d::Get_d2W_dI1I2(double I1, double I2)
106{
107 double ret = 0.0;
108
109 // notes: use ints not unsigned as doing p-1
110 // (except indexing from p=1,q=1 because multiplying by pq, but
111 // still safer to use ints)
112 for (int p=1; p<=(int)mN; p++)
113 {
114 for (int q=1; q<=(int)mN-p; q++)
115 {
116 ret += mAlpha[p][q] * p * q * pow(I1-3,p-1) * pow(I2-3,q-1);
117 }
118 }
119 return ret;
120}
121
122double PolynomialMaterialLaw3d::GetAlpha(unsigned i, unsigned j)
123{
124 assert(i+j > 0);
125 assert(i+j <= mN);
126
127 return mAlpha[i][j];
128}
129
130PolynomialMaterialLaw3d::PolynomialMaterialLaw3d(unsigned n, std::vector<std::vector<double> > alpha)
131{
132 if (n==0)
133 {
134 EXCEPTION("n must be positive");
135 }
136
137 mN = n;
138
139 // error checking: must have alpha[p][q]=0 if p+q>n
140 for (unsigned p=0; p<=mN; p++)
141 {
142 if (alpha[p].size() < mN+1-p)
143 {
144 EXCEPTION("alpha not big enough");
145 }
146
147 for (unsigned q=0; q<alpha[p].size(); q++)
148 {
149 if ((p+q>mN) && (fabs(alpha[p][q]) > 1e-12))
150 {
151 EXCEPTION("alpha[" << p << "][" << q << "] should be zero, as p+q > " << n);
152 }
153 }
154 }
155
156 mAlpha = alpha;
157}
158
159std::vector<std::vector<double> > PolynomialMaterialLaw3d::GetZeroedAlpha(unsigned n)
160{
161 std::vector<std::vector<double> > alpha(n+1);
162
163 for (unsigned i=0; i<n+1; i++)
164 {
165 alpha[i].resize(n+1);
166 for (unsigned j=0; j<n+1; j++)
167 {
168 alpha[i][j] = 0.0;
169 }
170 }
171
172 return alpha;
173}
#define EXCEPTION(message)
double Get_d2W_dI1(double I1, double I2)
double Get_dW_dI2(double I1, double I2)
double GetAlpha(unsigned i, unsigned j)
std::vector< std::vector< double > > mAlpha
double Get_dW_dI1(double I1, double I2)
double Get_d2W_dI1I2(double I1, double I2)
PolynomialMaterialLaw3d(unsigned n, std::vector< std::vector< double > > alpha)
static std::vector< std::vector< double > > GetZeroedAlpha(unsigned n)
double Get_d2W_dI2(double I1, double I2)